Persistent datastore not working

[vincentneuts]

I tried to create a persitent datastore like this:

var Datastore = require('react-native-local-mongodb');
var db = new Datastore({ filename: 'data',autoload:true});
var doc = { hello: 'world'  };
db.insert(doc);
db.find({}, function (err, docs) {
                console.log(docs);
 });

It didn't insert or find anything but, If I use it in memory like below. Then it works fine and just returns the doc that's inserted into it.

var Datastore = require('react-native-local-mongodb');
var db = new Datastore();
var doc = { hello: 'world'  };
db.insert(doc);
db.find({}, function (err, docs) {
                console.log(docs);
 });

Are there any android permissions that need to be set?

Update:

When performing insert, find or remove in an async function with wait before it it never finishes.

[antoniopresto]

Which version are you using?

[vincentneuts]

"dependencies": {
"react-native-local-mongodb": "^1.9.1",
"react": "16.2.0",
"react-native": "0.52.0"
........
}

and npm 4.6.1

[antoniopresto]

I can not test on android now. Can you try react-native-local-mongodb@1.9.2 ?

[antoniopresto]

please, try 2.0.0

[vincentneuts]

installed 2.0.0.

the persistance db works fine when running test, but skips inserting data when using android (6.0.1). did not try it on IOS

example of a scenario:

async function insert(){
    var testdb = await new Datastore({ filename: 'asyncStorageKey', autoload: true });
    console.log("Start persitence");
    await testdb.insertAsync({ name: 'Bob' })
    console.log("inserted")
    const items = await testdb.findAsync({})
    console.log(items);
    console.log("end test");
}

outcome:
only the first console.log will be executed.

Test:

import Datastore from "react-native-local-mongodb"
it('update with promise', async () => {
  const db = await new Datastore({filename: "test" , autoload: true })
  const items0 = await db.findAsync({})

  await db.insertAsync({ name: 'Maggie' })
  await db.insertAsync({ name: 'Bob' })

  const items = await db.findAsync({})

  const maggie1 = await db.findOneAsync({ name: 'Maggie' })
  const bob1 = await db.findOneAsync({ name: 'Bob' })

  await db.updateAsync({ name: { $in: ['Maggie', 'Bob'] } }, { $set: { age: 1 } }, { multi: true })

  const maggie2 = await db.findOneAsync({ name: 'Maggie' })
  const bob2 = await db.findOneAsync({ name: 'Bob' })

  expect(items0).toHaveLength(0)
  expect(items).toHaveLength(2)
  expect(maggie1.age).toBeUndefined()
  expect(bob1.age).toBeUndefined()
  expect(bob2.age).toEqual(1)
  expect(maggie2.age).toEqual(1)
})

Test Passed

[vincentneuts]

Solved:

It had something to do with the chrome debugging. -> Stopt debugging, restarted everything and it suddenly worked. Thanks for the help!

[vincentneuts]

Solved:

It had something to do with the chrome debugging. -> Stopt debugging, restarted everything and it suddenly worked. Thanks for the help!

source:
facebook/react-native#7605