@142vip.nest typeorm.类.MongoClient

TypedEventEmitter.addListener

listener

(eventName, listener) => void

返回

this

添加于

v0.1.26

继承自

调用签名

addListener(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5081

Alias for emitter.on(eventName, listener).

参数

event

string | symbol

listener

TypedEventEmitter.addListener

返回

this

添加于

v0.1.26

继承自

close()

close(force?): Promise<void>

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:3574

Close the client and its underlying connections

参数

force?

boolean

Force close, emitting no events

返回

Promise<void>

connect()

connect(): Promise<MongoClient>

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:3568

Connect to MongoDB using a url

返回

Promise<MongoClient>

参阅

docs.mongodb.org/manual/reference/connection-string/

db()

db(dbName?, options?): Db

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:3581

Create a new Db instance sharing the current socket connections.

参数

dbName?

string

The name of the database we want to use. If not provided, use database name from connection string.

options?

DbOptions

Optional settings for Db construction

返回

Db

emit()

emit<EventKey>(event, ...args): boolean

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5097

Synchronously calls each of the listeners registered for the event named eventName, in the order they were registered, passing the supplied arguments to each.

Returns true if the event had listeners, false otherwise.

import { EventEmitter } from 'node:events'

const myEmitter = new EventEmitter()

// First listener
myEmitter.on('event', () => {
  console.log('Helloooo! first listener')
})
// Second listener
myEmitter.on('event', (arg1, arg2) => {
  console.log(`event with parameters ${arg1}, ${arg2} in second listener`)
})
// Third listener
myEmitter.on('event', (...args) => {
  const parameters = args.join(', ')
  console.log(`event with parameters ${parameters} in third listener`)
})

console.log(myEmitter.listeners('event'))

myEmitter.emit('event', 1, 2, 3, 4, 5)

// Prints:
// [
//   [Function: firstListener],
//   [Function: secondListener],
//   [Function: thirdListener]
// ]
// Helloooo! first listener
// event with parameters 1, 2 in second listener
// event with parameters 1, 2, 3, 4, 5 in third listener

类型参数

EventKey

参数

event

symbol | EventKey

args

...Parameters<MongoClientEvents[EventKey]>

返回

boolean

添加于

v0.1.26

继承自

TypedEventEmitter.emit

eventNames()

eventNames(): string[]

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5105

Returns an array listing the events for which the emitter has registered listeners. The values in the array are strings or Symbols.

import { EventEmitter } from 'node:events'

const myEE = new EventEmitter()
myEE.on('foo', () => {})
myEE.on('bar', () => {})

const sym = Symbol('symbol')
myEE.on(sym, () => {})

console.log(myEE.eventNames())
// Prints: [ 'foo', 'bar', Symbol(symbol) ]

返回

string[]

添加于

v6.0.0

继承自

TypedEventEmitter.eventNames

getMaxListeners()

getMaxListeners(): number

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5106

Returns the current max listener value for the EventEmitter which is either set by emitter.setMaxListeners(n) or defaults to EventEmitter.defaultMaxListeners.

返回

number

添加于

v1.0.0

继承自

TypedEventEmitter.getMaxListeners

listenerCount()

listenerCount<EventKey>(type): number

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5098

Returns the number of listeners listening for the event named eventName. If listener is provided, it will return how many times the listener is found in the list of the listeners of the event.

类型参数

EventKey

参数

type

string | symbol | EventKey

返回

number

添加于

v3.2.0

继承自

TypedEventEmitter.listenerCount

listeners()

listeners<EventKey>(event): MongoClientEvents[EventKey][]

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5095

Returns a copy of the array of listeners for the event named eventName.

server.on('connection', (stream) => {
  console.log('someone connected!')
})
console.log(util.inspect(server.listeners('connection')))
// Prints: [ [Function] ]

类型参数

EventKey

参数

event

string | symbol | EventKey

返回

MongoClientEvents[EventKey][]

添加于

v0.1.26

继承自

TypedEventEmitter.listeners

off()

调用签名

off<EventKey>(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5091

Alias for emitter.removeListener().

类型参数

EventKey

参数

event

EventKey

listener

MongoClientEvents[EventKey]

返回

this

添加于

v10.0.0

继承自

TypedEventEmitter.off

调用签名

off(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5092

Alias for emitter.removeListener().

参数

event

TypedEventEmitter.off

listener

(eventName, listener) => void

返回

this

添加于

v10.0.0

继承自

调用签名

off(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5093

Alias for emitter.removeListener().

参数

event

string | symbol

listener

TypedEventEmitter.off

返回

this

添加于

v10.0.0

继承自

on()

调用签名

on<EventKey>(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5082

Adds the listener function to the end of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventName and listener will result in the listener being added, and called, multiple times.

server.on('connection', (stream) => {
  console.log('someone connected!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

By default, event listeners are invoked in the order they are added. The emitter.prependListener() method can be used as an alternative to add the event listener to the beginning of the listeners array.

import { EventEmitter } from 'node:events'

const myEE = new EventEmitter()
myEE.on('foo', () => console.log('a'))
myEE.prependListener('foo', () => console.log('b'))
myEE.emit('foo')
// Prints:
//   b
//   a

类型参数

EventKey

参数

event

EventKey

listener

MongoClientEvents[EventKey]

The callback function

返回

this

添加于

v0.1.101

继承自

调用签名

on(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5083

Adds the listener function to the end of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventName and listener will result in the listener being added, and called, multiple times.

server.on('connection', (stream) => {
  console.log('someone connected!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

By default, event listeners are invoked in the order they are added. The emitter.prependListener() method can be used as an alternative to add the event listener to the beginning of the listeners array.

import { EventEmitter } from 'node:events'

const myEE = new EventEmitter()
myEE.on('foo', () => console.log('a'))
myEE.prependListener('foo', () => console.log('b'))
myEE.emit('foo')
// Prints:
//   b
//   a

参数

event

listener

(eventName, listener) => void

The callback function

返回

this

添加于

v0.1.101

继承自

调用签名

on(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5084

Adds the listener function to the end of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventName and listener will result in the listener being added, and called, multiple times.

server.on('connection', (stream) => {
  console.log('someone connected!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

By default, event listeners are invoked in the order they are added. The emitter.prependListener() method can be used as an alternative to add the event listener to the beginning of the listeners array.

import { EventEmitter } from 'node:events'

const myEE = new EventEmitter()
myEE.on('foo', () => console.log('a'))
myEE.prependListener('foo', () => console.log('b'))
myEE.emit('foo')
// Prints:
//   b
//   a

参数

event

string | symbol

listener

The callback function

返回

this

添加于

v0.1.101

继承自

once()

调用签名

once<EventKey>(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5085

Adds a one-time listener function for the event named eventName. The next time eventName is triggered, this listener is removed and then invoked.

server.once('connection', (stream) => {
  console.log('Ah, we have our first user!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

By default, event listeners are invoked in the order they are added. The emitter.prependOnceListener() method can be used as an alternative to add the event listener to the beginning of the listeners array.

import { EventEmitter } from 'node:events'

const myEE = new EventEmitter()
myEE.once('foo', () => console.log('a'))
myEE.prependOnceListener('foo', () => console.log('b'))
myEE.emit('foo')
// Prints:
//   b
//   a

类型参数

EventKey

参数

event

EventKey

listener

MongoClientEvents[EventKey]

The callback function

返回

this

添加于

v0.3.0

继承自

调用签名

once(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5086

Adds a one-time listener function for the event named eventName. The next time eventName is triggered, this listener is removed and then invoked.

server.once('connection', (stream) => {
  console.log('Ah, we have our first user!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

By default, event listeners are invoked in the order they are added. The emitter.prependOnceListener() method can be used as an alternative to add the event listener to the beginning of the listeners array.

import { EventEmitter } from 'node:events'

const myEE = new EventEmitter()
myEE.once('foo', () => console.log('a'))
myEE.prependOnceListener('foo', () => console.log('b'))
myEE.emit('foo')
// Prints:
//   b
//   a

参数

event

listener

(eventName, listener) => void

The callback function

返回

this

添加于

v0.3.0

继承自

调用签名

once(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5087

Adds a one-time listener function for the event named eventName. The next time eventName is triggered, this listener is removed and then invoked.

server.once('connection', (stream) => {
  console.log('Ah, we have our first user!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

By default, event listeners are invoked in the order they are added. The emitter.prependOnceListener() method can be used as an alternative to add the event listener to the beginning of the listeners array.

import { EventEmitter } from 'node:events'

const myEE = new EventEmitter()
myEE.once('foo', () => console.log('a'))
myEE.prependOnceListener('foo', () => console.log('b'))
myEE.emit('foo')
// Prints:
//   b
//   a

参数

event

string | symbol

listener

The callback function

返回

this

添加于

v0.3.0

继承自

TypedEventEmitter.prependListener

prependListener()

调用签名

prependListener<EventKey>(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5099

Adds the listener function to the beginning of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventName and listener will result in the listener being added, and called, multiple times.

server.prependListener('connection', (stream) => {
  console.log('someone connected!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

类型参数

EventKey

参数

event

EventKey

listener

MongoClientEvents[EventKey]

The callback function

返回

this

添加于

v6.0.0

继承自

调用签名

prependListener(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5100

Adds the listener function to the beginning of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventName and listener will result in the listener being added, and called, multiple times.

server.prependListener('connection', (stream) => {
  console.log('someone connected!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

参数

event

TypedEventEmitter.prependListener

listener

(eventName, listener) => void

The callback function

返回

this

添加于

v6.0.0

继承自

调用签名

prependListener(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5101

Adds the listener function to the beginning of the listeners array for the event named eventName. No checks are made to see if the listener has already been added. Multiple calls passing the same combination of eventName and listener will result in the listener being added, and called, multiple times.

server.prependListener('connection', (stream) => {
  console.log('someone connected!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

参数

event

string | symbol

listener

TypedEventEmitter.prependListener

The callback function

返回

this

添加于

v6.0.0

继承自

prependOnceListener()

调用签名

prependOnceListener<EventKey>(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5102

Adds a one-timelistener function for the event named eventName to the beginning of the listeners array. The next time eventName is triggered, this listener is removed, and then invoked.

server.prependOnceListener('connection', (stream) => {
  console.log('Ah, we have our first user!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

类型参数

EventKey

参数

event

EventKey

listener

MongoClientEvents[EventKey]

The callback function

返回

this

添加于

v6.0.0

继承自

TypedEventEmitter.prependOnceListener

调用签名

prependOnceListener(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5103

Adds a one-timelistener function for the event named eventName to the beginning of the listeners array. The next time eventName is triggered, this listener is removed, and then invoked.

server.prependOnceListener('connection', (stream) => {
  console.log('Ah, we have our first user!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

参数

event

TypedEventEmitter.prependOnceListener

listener

(eventName, listener) => void

The callback function

返回

this

添加于

v6.0.0

继承自

调用签名

prependOnceListener(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5104

Adds a one-timelistener function for the event named eventName to the beginning of the listeners array. The next time eventName is triggered, this listener is removed, and then invoked.

server.prependOnceListener('connection', (stream) => {
  console.log('Ah, we have our first user!')
})

Returns a reference to the EventEmitter, so that calls can be chained.

参数

event

string | symbol

listener

TypedEventEmitter.prependOnceListener

The callback function

返回

this

添加于

v6.0.0

继承自

rawListeners()

rawListeners<EventKey>(event): MongoClientEvents[EventKey][]

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5096

Returns a copy of the array of listeners for the event named eventName, including any wrappers (such as those created by .once()).

import { EventEmitter } from 'node:events'

const emitter = new EventEmitter()
emitter.once('log', () => console.log('log once'))

// Returns a new Array with a function `onceWrapper` which has a property
// `listener` which contains the original listener bound above
const listeners = emitter.rawListeners('log')
const logFnWrapper = listeners[0]

// Logs "log once" to the console and does not unbind the `once` event
logFnWrapper.listener()

// Logs "log once" to the console and removes the listener
logFnWrapper()

emitter.on('log', () => console.log('log persistently'))
// Will return a new Array with a single function bound by `.on()` above
const newListeners = emitter.rawListeners('log')

// Logs "log persistently" twice
newListeners[0]()
emitter.emit('log')

类型参数

EventKey

参数

event

string | symbol | EventKey

返回

MongoClientEvents[EventKey][]

添加于

v9.4.0

继承自

TypedEventEmitter.rawListeners

removeAllListeners()

removeAllListeners<EventKey>(event?): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5094

Removes all listeners, or those of the specified eventName.

It is bad practice to remove listeners added elsewhere in the code, particularly when the EventEmitter instance was created by some other component or module (e.g. sockets or file streams).

Returns a reference to the EventEmitter, so that calls can be chained.

类型参数

EventKey

参数

event?

string | symbol | EventKey

返回

this

添加于

v0.1.26

继承自

TypedEventEmitter.removeAllListeners

removeListener()

调用签名

removeListener<EventKey>(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5088

Removes the specified listener from the listener array for the event named eventName.

function callback(stream) {
  console.log('someone connected!')
}
server.on('connection', callback)
// ...
server.removeListener('connection', callback)

removeListener() will remove, at most, one instance of a listener from the listener array. If any single listener has been added multiple times to the listener array for the specified eventName, then removeListener() must be called multiple times to remove each instance.

Once an event is emitted, all listeners attached to it at the time of emitting are called in order. This implies that any removeListener() or removeAllListeners() calls after emitting and before the last listener finishes execution will not remove them fromemit() in progress. Subsequent events behave as expected.

import { EventEmitter } from 'node:events'

class MyEmitter extends EventEmitter {}
const myEmitter = new MyEmitter()

function callbackA() {
  console.log('A')
  myEmitter.removeListener('event', callbackB)
}

function callbackB() {
  console.log('B')
}

myEmitter.on('event', callbackA)

myEmitter.on('event', callbackB)

// callbackA removes listener callbackB but it will still be called.
// Internal listener array at time of emit [callbackA, callbackB]
myEmitter.emit('event')
// Prints:
//   A
//   B

// callbackB is now removed.
// Internal listener array [callbackA]
myEmitter.emit('event')
// Prints:
//   A

Because listeners are managed using an internal array, calling this will change the position indices of any listener registered after the listener being removed. This will not impact the order in which listeners are called, but it means that any copies of the listener array as returned by the emitter.listeners() method will need to be recreated.

When a single function has been added as a handler multiple times for a single event (as in the example below), removeListener() will remove the most recently added instance. In the example the once('ping') listener is removed:

import { EventEmitter } from 'node:events'

const ee = new EventEmitter()

function pong() {
  console.log('pong')
}

ee.on('ping', pong)
ee.once('ping', pong)
ee.removeListener('ping', pong)

ee.emit('ping')
ee.emit('ping')

Returns a reference to the EventEmitter, so that calls can be chained.

类型参数

EventKey

参数

event

EventKey

listener

MongoClientEvents[EventKey]

返回

this

添加于

v0.1.26

继承自

TypedEventEmitter.removeListener

调用签名

removeListener(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5089

Removes the specified listener from the listener array for the event named eventName.

function callback(stream) {
  console.log('someone connected!')
}
server.on('connection', callback)
// ...
server.removeListener('connection', callback)

removeListener() will remove, at most, one instance of a listener from the listener array. If any single listener has been added multiple times to the listener array for the specified eventName, then removeListener() must be called multiple times to remove each instance.

Once an event is emitted, all listeners attached to it at the time of emitting are called in order. This implies that any removeListener() or removeAllListeners() calls after emitting and before the last listener finishes execution will not remove them fromemit() in progress. Subsequent events behave as expected.

import { EventEmitter } from 'node:events'

class MyEmitter extends EventEmitter {}
const myEmitter = new MyEmitter()

function callbackA() {
  console.log('A')
  myEmitter.removeListener('event', callbackB)
}

function callbackB() {
  console.log('B')
}

myEmitter.on('event', callbackA)

myEmitter.on('event', callbackB)

// callbackA removes listener callbackB but it will still be called.
// Internal listener array at time of emit [callbackA, callbackB]
myEmitter.emit('event')
// Prints:
//   A
//   B

// callbackB is now removed.
// Internal listener array [callbackA]
myEmitter.emit('event')
// Prints:
//   A

Because listeners are managed using an internal array, calling this will change the position indices of any listener registered after the listener being removed. This will not impact the order in which listeners are called, but it means that any copies of the listener array as returned by the emitter.listeners() method will need to be recreated.

When a single function has been added as a handler multiple times for a single event (as in the example below), removeListener() will remove the most recently added instance. In the example the once('ping') listener is removed:

import { EventEmitter } from 'node:events'

const ee = new EventEmitter()

function pong() {
  console.log('pong')
}

ee.on('ping', pong)
ee.once('ping', pong)
ee.removeListener('ping', pong)

ee.emit('ping')
ee.emit('ping')

Returns a reference to the EventEmitter, so that calls can be chained.

参数

event

TypedEventEmitter.removeListener

listener

(eventName, listener) => void

返回

this

添加于

v0.1.26

继承自

调用签名

removeListener(event, listener): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5090

Removes the specified listener from the listener array for the event named eventName.

function callback(stream) {
  console.log('someone connected!')
}
server.on('connection', callback)
// ...
server.removeListener('connection', callback)

removeListener() will remove, at most, one instance of a listener from the listener array. If any single listener has been added multiple times to the listener array for the specified eventName, then removeListener() must be called multiple times to remove each instance.

Once an event is emitted, all listeners attached to it at the time of emitting are called in order. This implies that any removeListener() or removeAllListeners() calls after emitting and before the last listener finishes execution will not remove them fromemit() in progress. Subsequent events behave as expected.

import { EventEmitter } from 'node:events'

class MyEmitter extends EventEmitter {}
const myEmitter = new MyEmitter()

function callbackA() {
  console.log('A')
  myEmitter.removeListener('event', callbackB)
}

function callbackB() {
  console.log('B')
}

myEmitter.on('event', callbackA)

myEmitter.on('event', callbackB)

// callbackA removes listener callbackB but it will still be called.
// Internal listener array at time of emit [callbackA, callbackB]
myEmitter.emit('event')
// Prints:
//   A
//   B

// callbackB is now removed.
// Internal listener array [callbackA]
myEmitter.emit('event')
// Prints:
//   A

Because listeners are managed using an internal array, calling this will change the position indices of any listener registered after the listener being removed. This will not impact the order in which listeners are called, but it means that any copies of the listener array as returned by the emitter.listeners() method will need to be recreated.

When a single function has been added as a handler multiple times for a single event (as in the example below), removeListener() will remove the most recently added instance. In the example the once('ping') listener is removed:

import { EventEmitter } from 'node:events'

const ee = new EventEmitter()

function pong() {
  console.log('pong')
}

ee.on('ping', pong)
ee.once('ping', pong)
ee.removeListener('ping', pong)

ee.emit('ping')
ee.emit('ping')

Returns a reference to the EventEmitter, so that calls can be chained.

参数

event

string | symbol

listener

TypedEventEmitter.removeListener

返回

this

添加于

v0.1.26

继承自

setMaxListeners()

setMaxListeners(n): this

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:5107

By default EventEmitters will print a warning if more than 10 listeners are added for a particular event. This is a useful default that helps finding memory leaks. The emitter.setMaxListeners() method allows the limit to be modified for this specific EventEmitter instance. The value can be set to Infinity (or 0) to indicate an unlimited number of listeners.

Returns a reference to the EventEmitter, so that calls can be chained.

参数

n

number

返回

this

添加于

v0.3.5

继承自

TypedEventEmitter.setMaxListeners

startSession()

startSession(options?): ClientSession

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:3592

Starts a new session on the server

参数

options?

ClientSessionOptions

返回

ClientSession

watch()

watch<TSchema, TChange>(pipeline?, options?): ChangeStream<TSchema, TChange>

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:3619

Create a new Change Stream, watching for new changes (insertions, updates, replacements, deletions, and invalidations) in this cluster. Will ignore all changes to system collections, as well as the local, admin, and config databases.

类型参数

TSchema

TSchema extends Document = Document

Type of the data being detected by the change stream

TChange

TChange extends Document = ChangeStreamDocument<TSchema>

Type of the whole change stream document emitted

参数

pipeline?

Document[]

An array of pipeline stages through which to pass change stream documents. This allows for filtering (using $match) and manipulating the change stream documents.

options?

ChangeStreamOptions

Optional settings for the command

返回

ChangeStream<TSchema, TChange>

备注

watch() accepts two generic arguments for distinct use cases:

The first is to provide the schema that may be defined for all the data within the current cluster
The second is to override the shape of the change stream document entirely, if it is not provided the type will default to ChangeStreamDocument of the first argument

withSession()

调用签名

withSession(callback): Promise<void>

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:3602

Runs a given operation with an implicitly created session. The lifetime of the session will be handled without the need for user interaction.

NOTE: presently the operation MUST return a Promise (either explicit or implicitly as an async function)

参数

callback

WithSessionCallback

An callback to execute with an implicitly created session

返回

Promise<void>

调用签名

withSession(options, callback): Promise<void>

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:3603

Runs a given operation with an implicitly created session. The lifetime of the session will be handled without the need for user interaction.

NOTE: presently the operation MUST return a Promise (either explicit or implicitly as an async function)

参数

options

ClientSessionOptions

Optional settings for the command

callback

WithSessionCallback

An callback to execute with an implicitly created session

返回

Promise<void>

addAbortListener()

static addAbortListener(signal, resource): Disposable

定义于: node_modules/.pnpm/@types+node@22.10.7/node_modules/@types/node/events.d.ts:437

Experimental

Listens once to the abort event on the provided signal.

Listening to the abort event on abort signals is unsafe and may lead to resource leaks since another third party with the signal can call e.stopImmediatePropagation(). Unfortunately Node.js cannot change this since it would violate the web standard. Additionally, the original API makes it easy to forget to remove listeners.

This API allows safely using AbortSignals in Node.js APIs by solving these two issues by listening to the event such that stopImmediatePropagation does not prevent the listener from running.

Returns a disposable so that it may be unsubscribed from more easily.

import { addAbortListener } from 'node:events'

function example(signal) {
  let disposable
  try {
    signal.addEventListener('abort', e => e.stopImmediatePropagation())
    disposable = addAbortListener(signal, (e) => {
      // Do something when signal is aborted.
    })
  }
  finally {
    disposable?.[Symbol.dispose]()
  }
}

参数

signal

AbortSignal

resource

(event) => void

返回

Disposable

Disposable that removes the abort listener.

添加于

v20.5.0

继承自

TypedEventEmitter.addAbortListener

connect()

static connect(url, options?): Promise<MongoClient>

定义于: node_modules/.pnpm/typeorm@0.3.30_ioredis@5.6.0_mongodb@6.19.0_mssql@11.0.1_mysql2@3.15.1_pg@8.11.3_ts-node@10.9_6zvdq3z7xgsf663jy3j6oymho4/node_modules/typeorm/driver/mongodb/typings.d.ts:3590

Connect to MongoDB using a url

参数

url

string

options?

MongoClientOptions

返回

Promise<MongoClient>

备注

The programmatically provided options take precedence over the URI options.

参阅

https://www.mongodb.com/docs/manual/reference/connection-string/

getEventListeners()

static getEventListeners(emitter, name): Function[]

定义于: node_modules/.pnpm/@types+node@22.10.7/node_modules/@types/node/events.d.ts:358

Returns a copy of the array of listeners for the event named eventName.

For EventEmitters this behaves exactly the same as calling .listeners on the emitter.

For EventTargets this is the only way to get the event listeners for the event target. This is useful for debugging and diagnostic purposes.

import { EventEmitter, getEventListeners } from 'node:events'

{
  const ee = new EventEmitter()
  const listener = () => console.log('Events are fun')
  ee.on('foo', listener)
  console.log(getEventListeners(ee, 'foo')) // [ [Function: listener] ]
}
{
  const et = new EventTarget()
  const listener = () => console.log('Events are fun')
  et.addEventListener('foo', listener)
  console.log(getEventListeners(et, 'foo')) // [ [Function: listener] ]
}

参数

emitter

EventEmitter<DefaultEventMap> | EventTarget

name

string | symbol

返回

Function[]

添加于

v15.2.0, v14.17.0

继承自

TypedEventEmitter.getEventListeners

getMaxListeners()

static getMaxListeners(emitter): number

定义于: node_modules/.pnpm/@types+node@22.10.7/node_modules/@types/node/events.d.ts:387

Returns the currently set max amount of listeners.

For EventEmitters this behaves exactly the same as calling .getMaxListeners on the emitter.

For EventTargets this is the only way to get the max event listeners for the event target. If the number of event handlers on a single EventTarget exceeds the max set, the EventTarget will print a warning.

import { EventEmitter, getMaxListeners, setMaxListeners } from 'node:events'

{
  const ee = new EventEmitter()
  console.log(getMaxListeners(ee)) // 10
  setMaxListeners(11, ee)
  console.log(getMaxListeners(ee)) // 11
}
{
  const et = new EventTarget()
  console.log(getMaxListeners(et)) // 10
  setMaxListeners(11, et)
  console.log(getMaxListeners(et)) // 11
}

参数

emitter

EventEmitter<DefaultEventMap> | EventTarget

返回

number

添加于

v19.9.0

继承自

TypedEventEmitter.getMaxListeners

listenerCount()

static listenerCount(emitter, eventName): number

定义于: node_modules/.pnpm/@types+node@22.10.7/node_modules/@types/node/events.d.ts:330

A class method that returns the number of listeners for the given eventName registered on the given emitter.

import { EventEmitter, listenerCount } from 'node:events'

const myEmitter = new EventEmitter()
myEmitter.on('event', () => {})
myEmitter.on('event', () => {})
console.log(listenerCount(myEmitter, 'event'))
// Prints: 2

参数

emitter

EventEmitter

The emitter to query

eventName

string | symbol

The event name

返回

number

添加于

v0.9.12

已被弃用

Since v3.2.0 - Use listenerCount instead.

继承自

TypedEventEmitter.listenerCount

on()

调用签名

static on(emitter, eventName, options?): AsyncIterator<any[]>

定义于: node_modules/.pnpm/@types+node@22.10.7/node_modules/@types/node/events.d.ts:303

import { EventEmitter, on } from 'node:events'
import process from 'node:process'

const ee = new EventEmitter()

// Emit later on
process.nextTick(() => {
  ee.emit('foo', 'bar')
  ee.emit('foo', 42)
})

for await (const event of on(ee, 'foo')) {
  // The execution of this inner block is synchronous and it
  // processes one event at a time (even with await). Do not use
  // if concurrent execution is required.
  console.log(event) // prints ['bar'] [42]
}
// Unreachable here

Returns an AsyncIterator that iterates eventName events. It will throw if the EventEmitter emits 'error'. It removes all listeners when exiting the loop. The value returned by each iteration is an array composed of the emitted event arguments.

An AbortSignal can be used to cancel waiting on events:

import { EventEmitter, on } from 'node:events'
import process from 'node:process'

const ac = new AbortController();

(async () => {
  const ee = new EventEmitter()

  // Emit later on
  process.nextTick(() => {
    ee.emit('foo', 'bar')
    ee.emit('foo', 42)
  })

  for await (const event of on(ee, 'foo', { signal: ac.signal })) {
    // The execution of this inner block is synchronous and it
    // processes one event at a time (even with await). Do not use
    // if concurrent execution is required.
    console.log(event) // prints ['bar'] [42]
  }
  // Unreachable here
})()

process.nextTick(() => ac.abort())

Use the close option to specify an array of event names that will end the iteration:

import { EventEmitter, on } from 'node:events'
import process from 'node:process'

const ee = new EventEmitter()

// Emit later on
process.nextTick(() => {
  ee.emit('foo', 'bar')
  ee.emit('foo', 42)
  ee.emit('close')
})

for await (const event of on(ee, 'foo', { close: ['close'] })) {
  console.log(event) // prints ['bar'] [42]
}
// the loop will exit after 'close' is emitted
console.log('done') // prints 'done'

参数

emitter

EventEmitter

eventName

string | symbol

options?

StaticEventEmitterIteratorOptions

返回

AsyncIterator<any[]>

An AsyncIterator that iterates eventName events emitted by the emitter

添加于

v13.6.0, v12.16.0

继承自

调用签名

static on(emitter, eventName, options?): AsyncIterator<any[]>

定义于: node_modules/.pnpm/@types+node@22.10.7/node_modules/@types/node/events.d.ts:308

import { EventEmitter, on } from 'node:events'
import process from 'node:process'

const ee = new EventEmitter()

// Emit later on
process.nextTick(() => {
  ee.emit('foo', 'bar')
  ee.emit('foo', 42)
})

for await (const event of on(ee, 'foo')) {
  // The execution of this inner block is synchronous and it
  // processes one event at a time (even with await). Do not use
  // if concurrent execution is required.
  console.log(event) // prints ['bar'] [42]
}
// Unreachable here

Returns an AsyncIterator that iterates eventName events. It will throw if the EventEmitter emits 'error'. It removes all listeners when exiting the loop. The value returned by each iteration is an array composed of the emitted event arguments.

An AbortSignal can be used to cancel waiting on events:

import { EventEmitter, on } from 'node:events'
import process from 'node:process'

const ac = new AbortController();

(async () => {
  const ee = new EventEmitter()

  // Emit later on
  process.nextTick(() => {
    ee.emit('foo', 'bar')
    ee.emit('foo', 42)
  })

  for await (const event of on(ee, 'foo', { signal: ac.signal })) {
    // The execution of this inner block is synchronous and it
    // processes one event at a time (even with await). Do not use
    // if concurrent execution is required.
    console.log(event) // prints ['bar'] [42]
  }
  // Unreachable here
})()

process.nextTick(() => ac.abort())

Use the close option to specify an array of event names that will end the iteration:

import { EventEmitter, on } from 'node:events'
import process from 'node:process'

const ee = new EventEmitter()

// Emit later on
process.nextTick(() => {
  ee.emit('foo', 'bar')
  ee.emit('foo', 42)
  ee.emit('close')
})

for await (const event of on(ee, 'foo', { close: ['close'] })) {
  console.log(event) // prints ['bar'] [42]
}
// the loop will exit after 'close' is emitted
console.log('done') // prints 'done'

参数

emitter

EventTarget

eventName

string

options?

StaticEventEmitterIteratorOptions

返回

AsyncIterator<any[]>

An AsyncIterator that iterates eventName events emitted by the emitter

添加于

v13.6.0, v12.16.0

继承自

once()

调用签名

static once(emitter, eventName, options?): Promise<any[]>

定义于: node_modules/.pnpm/@types+node@22.10.7/node_modules/@types/node/events.d.ts:217

Creates a Promise that is fulfilled when the EventEmitter emits the given event or that is rejected if the EventEmitter emits 'error' while waiting. The Promise will resolve with an array of all the arguments emitted to the given event.

This method is intentionally generic and works with the web platform EventTarget interface, which has no special'error' event semantics and does not listen to the 'error' event.

import { EventEmitter, once } from 'node:events'
import process from 'node:process'

const ee = new EventEmitter()

process.nextTick(() => {
  ee.emit('myevent', 42)
})

const [value] = await once(ee, 'myevent')
console.log(value)

const err = new Error('kaboom')
process.nextTick(() => {
  ee.emit('error', err)
})

try {
  await once(ee, 'myevent')
}
catch (err) {
  console.error('error happened', err)
}

The special handling of the 'error' event is only used when events.once() is used to wait for another event. If events.once() is used to wait for the 'error' event itself, then it is treated as any other kind of event without special handling:

import { EventEmitter, once } from 'node:events'

const ee = new EventEmitter()

once(ee, 'error')
  .then(([err]) => console.log('ok', err.message))
  .catch(err => console.error('error', err.message))

ee.emit('error', new Error('boom'))

// Prints: ok boom

An AbortSignal can be used to cancel waiting for the event:

import { EventEmitter, once } from 'node:events'

const ee = new EventEmitter()
const ac = new AbortController()

async function foo(emitter, event, signal) {
  try {
    await once(emitter, event, { signal })
    console.log('event emitted!')
  }
  catch (error) {
    if (error.name === 'AbortError') {
      console.error('Waiting for the event was canceled!')
    }
    else {
      console.error('There was an error', error.message)
    }
  }
}

foo(ee, 'foo', ac.signal)
ac.abort() // Abort waiting for the event
ee.emit('foo') // Prints: Waiting for the event was canceled!

参数

emitter

EventEmitter

eventName

string | symbol

options?

StaticEventEmitterOptions

返回

Promise<any[]>

添加于

v11.13.0, v10.16.0

继承自

调用签名

static once(emitter, eventName, options?): Promise<any[]>

定义于: node_modules/.pnpm/@types+node@22.10.7/node_modules/@types/node/events.d.ts:222

Creates a Promise that is fulfilled when the EventEmitter emits the given event or that is rejected if the EventEmitter emits 'error' while waiting. The Promise will resolve with an array of all the arguments emitted to the given event.

This method is intentionally generic and works with the web platform EventTarget interface, which has no special'error' event semantics and does not listen to the 'error' event.

import { EventEmitter, once } from 'node:events'
import process from 'node:process'

const ee = new EventEmitter()

process.nextTick(() => {
  ee.emit('myevent', 42)
})

const [value] = await once(ee, 'myevent')
console.log(value)

const err = new Error('kaboom')
process.nextTick(() => {
  ee.emit('error', err)
})

try {
  await once(ee, 'myevent')
}
catch (err) {
  console.error('error happened', err)
}

The special handling of the 'error' event is only used when events.once() is used to wait for another event. If events.once() is used to wait for the 'error' event itself, then it is treated as any other kind of event without special handling:

import { EventEmitter, once } from 'node:events'

const ee = new EventEmitter()

once(ee, 'error')
  .then(([err]) => console.log('ok', err.message))
  .catch(err => console.error('error', err.message))

ee.emit('error', new Error('boom'))

// Prints: ok boom

An AbortSignal can be used to cancel waiting for the event:

import { EventEmitter, once } from 'node:events'

const ee = new EventEmitter()
const ac = new AbortController()

async function foo(emitter, event, signal) {
  try {
    await once(emitter, event, { signal })
    console.log('event emitted!')
  }
  catch (error) {
    if (error.name === 'AbortError') {
      console.error('Waiting for the event was canceled!')
    }
    else {
      console.error('There was an error', error.message)
    }
  }
}

foo(ee, 'foo', ac.signal)
ac.abort() // Abort waiting for the event
ee.emit('foo') // Prints: Waiting for the event was canceled!

参数

emitter

EventTarget

eventName

string

options?

StaticEventEmitterOptions

返回

Promise<any[]>

添加于

v11.13.0, v10.16.0

继承自