Loopback - "Cannot read property 'connector' of null" in Connector hooks - node.js

I tried to follow this example
https://docs.strongloop.com/display/public/LB/Connector+hooks
var connector = MyModel.getDataSource().connector;
connector.observe('before execute', function(ctx, next) {
// ...
next();
});
But the property 'connector' seems to be undefined. I need to add a connector hook in the boot script. Any idea?

Use something like this to add a connector.
In server/datasource.json
{
"db": {
"host": "",
"port": 0,
"database": "",
"password": "",
"name": "db",
"connector": "memory",
"user": ""
},
"mongodb": {
"host": "0.0.0.0",
"port": 27017,
"database": "drugcorner",
"password": "12345",
"name": "mongodb",
"connector": "mongodb",
"user": "robins"
}
}
We have have MongoDb datasource datasource defined with name mongodb.
Now to use a connector for mongodb inside any boot files.
server/boot/testConnector.js
var mongoConnector = app.dataSources.mongodb.connector;

Related

loopback 3 creating only test database for mongo

I exported NODE_ENV=local and defined my mongo datasource as follows in datasources.local.json
"mongo": {
"host": "localhost",
"port": 27017,
"url": "mongodb://localhost:27017/mydb",
"database": "mydb",
"password": "",
"name": "mongo",
"user": "",
"connector": "mongodb"
},
But the database name is getting created as 'test'.I also tried in datasources.json but it's still the same. I need the database name to be 'mydb'. Please help
What fixed the problem for me was to set the name of the object to "db" and not "mongo" or "mongods".
"db": {
"host": "localhost",
"port": 27017,
"url": "mongodb://localhost:27017/mydb",
"database": "mydb",
"password": "",
"name": "mongo",
"user": "",
"connector": "mongodb"
},

Issue with Loopback MongoDB Connector

i am using special character $ in my Mongodb password.
this is how my connector looks like
{
"name": {
"host": "using ip here",
"port": 27017,
"url": "",
"database": "",
"password": "example123$",
"name": "name",
"user": "username",
"connector": "mongodb"
}
}
Error
Cannot initialize connector "mongodb": Password contains an illegal unescaped character
is there a way i can use special character in Loopback connector.
Try with %24. ie example123%24
%24 is the encoded value of $
const enc = encodeURIComponent('$')
console.log('Encoded Value :', enc)
Pls looking at issue #3764 on loopback Github.
https://github.com/strongloop/loopback/issues/3764

Connect to mLab mongoDB database using nodeJS Strapi

I just got started using strapi framework and I would like to use mLab as my mongoDB database, so I go to configure strapi and fill the following details:
{
"defaultConnection": "default",
"connections": {
"default": {
"connector": "strapi-mongoose",
"settings": {
"client": "mongo",
"host": "localhost",
"port": 27017,
"database": "development",
"username": "",
"password": ""
},
"options": {}
}
}
}
The details I get from mLab are:
mongodb://myUsername:myPassword#ds047891.mlab.com:41365/myDatabase
Here is my final config:
{
"defaultConnection": "default",
"connections": {
"default": {
"connector": "strapi-mongoose",
"settings": {
"client": "mongo",
"host": "ds047891.mlab.com",
"port": 41365,
"database": "myDatabase",
"username": "myUsername",
"password": "myPassword"
},
"options": {}
}
}
}
When I try to start strapi, I get the following error:
DEBUG (2748 on DESKTOP-HAL1ATE): Server wasn't able to start properly.
ERROR (2748 on DESKTOP-HAL1ATE): (hook:mongoose) takes too long to load
I think that I did not setup my configuration right, but I can't pinpoint where the problem is. I hope someone could, thanks.
I am Pierre, on of the creators of Strapi. I tried with the following configuration and it worked well:
{
"defaultConnection": "default",
"connections": {
"default": {
"connector": "strapi-mongoose",
"settings": {
"client": "mongo",
"host": "ds135777.mlab.com",
"port": "35777",
"database": "myDatabase",
"username": "myUsername",
"password": "myPassword"
},
"options": {}
}
}
}
Our configurations files look quiet similar.
What file did you updated (/config/environment/development/database.json or /config/environment/production/database.json)?
Are you sure you entered the correct username and password? Did you try to login to your MongoDB instance through the command line mongo ds135777.mlab.com:35777/myDatabase -u <dbuser> -p <dbpassword>?
UPDATE
In version >= 3 for mlab don't forget to specify authenticationDatabase
"options": {
"authenticationDatabase": "your_mlad_database_name",
"ssl": false
}

TypeORM with multiple env setups

I want to use a separate database for running tests. So I tried to configure TypeORM for multiple environments (dev and test) but it's not working. It only use the 'dev' configuration.
This is my npm scripts:
"scripts": {
"start": "NODE_ENV=dev node dist/index.js",
"test": "NODE_ENV=test mocha --reporter spec --compilers ts:ts-node/register 'test/**/*.test.ts'"
}
If I console.log(process.env.NODE_ENV) I get the correct results ("dev" / "test").
This is my ormconfig.json
[
{
"environment": "dev",
"name": "default",
"driver": {
"type": "mysql",
"host": "localhost",
"port": 3306,
"username": "root",
"password": "",
"database": "api"
},
"entities": [ "dist/model/*.js" ],
"autoSchemaSync": true
},
{
"environment": "test",
"name": "default",
"driver": {
"type": "mysql",
"host": "localhost",
"port": 3306,
"username": "root",
"password": "",
"database": "api_test"
},
"entities": [ "dist/model/*.js" ],
"autoSchemaSync": true
}
]
I connect with createConnection();. I manually created both databases api and api_test beforehand.
Why is TypeORM not using the "test" configuration when I set NODE_ENV=test?
You could change your ormconfig.json to a js file then do something similar to this:
require('dotenv/config');
const database = {
development: "dev-db",
production: 'prod-db',
test: 'test-db'
}
module.exports = {
type: 'postgres',
host: 'localhost',
port: 5432,
username: 'ur-username',
password: 'password',
database: database[process.env.NODE_ENV],
entities: ['dist/**/*.entity{.ts,.js}'],
synchronize: true,
migrationsTableName: 'migration',
migrations: ['migration/*.js'],
cli: {
migrationsDir: 'migration',
},
};
Then when running your tests, don't forget to set the appropriate environment. NODE_ENV=test should do.
I had a similar problem. I got this to work by using different 'name' fields for each connection. For my run-time connection, I kept name=default, and for my test connection I used name=test. So:
[
{
"environment": "dev",
"name": "default",
"driver": {
"type": "mysql",
"host": "localhost",
"port": 3306,
"username": "root",
"password": "",
"database": "api"
},
"entities": [ "dist/model/*.js" ],
"autoSchemaSync": true
},
{
"environment": "test",
"name": "test", //// CHANGED
"driver": {
"type": "mysql",
"host": "localhost",
"port": 3306,
"username": "root",
"password": "",
"database": "api_test"
},
"entities": [ "dist/model/*.js" ],
"autoSchemaSync": true
}
]
In my application, I would simply use createConnection(), which would automatically use the connection with name=default.
For my tests, I used typeorm's createConnections() (notice the s). This loads all connections. Once loaded, I would immediately after use getConnection('test'), which would get the test connection. My beforeAll in my tests looked like this in typescript:
beforeAll(async () => {
await createConnections();
getConnection('test');
});
In javascript, it would probably look something like:
beforeAll(() => {
createConnections().then(() => {
getConnection('test');
});
});
Then my tests started to pass. Hope that helps.
I had the same problem and I solved it by installing cross-env and the dotenv-flow package.
My typeorm script looked like this:
"typeorm": "cross-env NODE_ENV=development ts-node -r tsconfig-paths/register ./node_modules/typeorm/cli -d src/core/database/ormconfig.ts",
And I created an ormconfig.ts file, where I define the database connection variables through process.env, and all I had to do was add the "require" related to "dotenv-flow".
My ormconfig.ts
import { DataSource } from "typeorm";
require('dotenv-flow').config();
export const AppDataSource = new DataSource({
type: 'postgres',
host: process.env.DB_HOST,
port: parseInt(process.env.DB_PORT) || 5432,
username: process.env.DB_USER,
password: process.env.DB_PASS,
database: process.env.DB_NAME,
entities: [
],
migrations: [
],
migrationsRun: false,
migrationsTableName: 'history'
});
This option is no longer available.
You can see the pull request that removed it from the TypeORM docs, in Aug, 2017, here:
https://github.com/typeorm/typeorm.github.io/pull/13/files
The functionality itself seems to have been removed in a commit with other changes to fix another (unrelated?) issue. It is not immediately clear what the intent was in removing it.

Configuring database username and password in Compound JS project (MongoDB)

I have started using CompoundJS with MongoDB as database.
I know i should do the host configuration in /config/database.json,
but not sure how i should add username/password for database configuration.
I tried to add username/password like below, but its not functional
{ "development":
{ "driver": "mongoose"
, "url": "mongodb://localhost/stats_development",
"username": "admin",
"password": "123456"
}
, "test":
{ "driver": "mongoose"
, "url": "mongodb://localhost/stats_test",
"username": "admin",
"password": "123456"
}
, "production":
{ "driver": "mongoose"
, "url": "mongodb://localhost/stats_production",
"username": "admin",
"password": "123456"
}
}
I found the solution..
mongodb://user:password#host:port/dbname
Thanks to Sagish, Reference : https://github.com/1602/compound/issues/377

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