Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
dumbdb ain't couchdb - it's an attempt to do the simplest nodb possible, using just core JS stuff.
JavaScript
Branch: master

Fetching latest commit…

Cannot retrieve the latest commit at this time

Failed to load latest commit information.
.gitignore
README.md
dumbdb.js
package.json
test1.js
test2.js

README.md

dumbdb.js

summary

dumbdb ain't couchdb.

it's an attempt to do the simplest nodb possible, using just core JS stuff.

each collection is a JS object used as a hash (duh).

collections are persisted to disk every n seconds.

_ids are auto generated if ommitted.

there are no _revs or attachments... or synchronization magic either.

you can spawn an http interface though, using dumbdb_srv! :)

otherwise, you get an in-process kinda-db-thingy. if so, be careful since dumb doesn't clone given objects by default.

does it scale? probably not. what's the purpose? fun and a little bit of learning. KISS was the main concern here.

API

require

the require returns a function which can receive configuration options, namely:

  • saveEveryNSeconds (defaults to 5)
  • rootDir (defaults to __dirname, i.e., the current directory collections are read/saved to)
  • verbose (defaults to false, iif true prints out additional info to stdout)
  • timestamps (defaults to true, sets _createdAt and _modifiedAt keys on objects)

var dumbdb = require('dumbdb')({verbose:true});

create and open collection

from that, you can either open or create a collection. (will be stored as <collection_name>.ddb)

dumbdb.create({String} collectionName, [{Boolean} openIfExistent], Function({String} err, {Collection} coll))

dumbdb.open({String} collectionName, [{Boolean} createIfInexistent], Function({String} err, {Collection} coll))

collection methods

once you create/open a collection you get this interface:

{Boolean} <coll>.exists({String} id) to find if item exists (id is assigned)

{Object|null} <coll>.get({String} id, [{Number} rev]) gets the object assigned to the id, optionally a revision other than the last one

{Object} <coll>.put({Object} o) saves the given object, creating a new revision

{Boolean} <coll>.del({String} id) deletes the object

{Object[]} <coll>.getRevisions({String} id) returns item revisions

{Number[]} <coll>.getRevisionDates({String} id) returns item revision dates

{Boolean} <coll>.restore({String} id, [{Number} rev]) restores an object's revision

<coll>.discardRevisions() discards revisions, making the actual one revision 1

<coll>.clear() removes all items from a collection

<coll>.close() closes a collection (no longer usable for the session)

<coll>.drop() closes and delete data from disk

{Object[]} <coll>.all() returns all items of the collection

{Object[]} <coll>.mapReduce({Function({Object} doc, [{Function({String} key, {Array} values)})

the mapping function must invoke this.emit(key, value) to publish rows. reduction is optional. there are some auxiliary methods to aid in common reductions (this.sum(arr), this.factor(arr), this.avg(arr)).

Something went wrong with that request. Please try again.