问题
I am trying to set the test database for the testing purpose, but its not working.
I am trying to connect to mongodb using mongoose, but finding problem in connection error shows:
throw new MongooseError('The `uri` parameter to `openUri()` must be a ' +
^
MongooseError: The `uri` parameter to `openUri()` must be a string, got "undefined". Make sure the first parameter to `mongoose.connect()` or `mongoose.createConnection()`is a string.
at new MongooseError (/media/abhigyan/ABHI/programming/node js/Practice/On my Own/Todo/node_modules/mongoose/lib/error/mongooseError.js:11:11)
at NativeConnection.Connection.openUri (/media/abhigyan/ABHI/programming/node js/Practice/On my Own/Todo/node_modules/mongoose/lib/connection.js:424:11)
at Mongoose.connect (/media/abhigyan/ABHI/programming/node js/Practice/On my Own/Todo/node_modules/mongoose/lib/index.js:230:15)
at Object.<anonymous> (/media/abhigyan/ABHI/programming/node js/Practice/On my Own/Todo/server/db/mongoose.js:5:10)
at Module._compile (module.js:635:30)
at Object.Module._extensions..js (module.js:646:10)
at Module.load (module.js:554:32)
at tryModuleLoad (module.js:497:12)
at Function.Module._load (module.js:489:3)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/media/abhigyan/ABHI/programming/node js/Practice/On my Own/Todo/server/models/Todo.js:1:82)
at Module._compile (module.js:635:30)
at Object.Module._extensions..js (module.js:646:10)
at Module.load (module.js:554:32)
at tryModuleLoad (module.js:497:12)
at Function.Module._load (module.js:489:3)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/media/abhigyan/ABHI/programming/node js/Practice/On my Own/Todo/server/tests/server.test.js:4:16)
at Module._compile (module.js:635:30)
at Object.Module._extensions..js (module.js:646:10)
at Module.load (module.js:554:32)
at tryModuleLoad (module.js:497:12)
at Function.Module._load (module.js:489:3)
at Module.require (module.js:579:17)
at require (internal/module.js:11:18)
at /media/abhigyan/ABHI/programming/node js/Practice/On my Own/Todo/node_modules/mocha/lib/mocha.js:250:27
at Array.forEach (<anonymous>)
at Mocha.loadFiles (/media/abhigyan/ABHI/programming/node js/Practice/On my Own/Todo/node_modules/mocha/lib/mocha.js:247:14)
at Mocha.run (/media/abhigyan/ABHI/programming/node js/Practice/On my Own/Todo/node_modules/mocha/lib/mocha.js:576:10)
at Object.<anonymous> (/media/abhigyan/ABHI/programming/node js/Practice/On my Own/Todo/node_modules/mocha/bin/_mocha:637:18)
at Module._compile (module.js:635:30)
at Object.Module._extensions..js (module.js:646:10)
at Module.load (module.js:554:32)
at tryModuleLoad (module.js:497:12)
at Function.Module._load (module.js:489:3)
at Function.Module.runMain (module.js:676:10)
at startup (bootstrap_node.js:187:16)
at bootstrap_node.js:608:3
error Command failed with exit code 1.
I am passing a valid String, but Its not working!
const mongoose = require('mongoose');
mongoose.Promise = global.Promise;
mongoose.connect(process.env.MONGODB_URI, err => {
if(err)
console.log(err);
}
);
module.exports = {
mongoose
};
Here is the Script to run mocha:
export NODE_ENV='test' && mocha server/**/*.test.js
Here is the configuration code:
const config = require('./config.json');
const env = process.env.NODE_ENV.toString() || 'development';
if(env === 'test' || env === 'development') {
const envConfig = config[env];
Object.keys(envConfig).forEach(key => {
process.env[key] = envConfig[key];
});
};
console.log(env);
Here is the config.json file:
{
"test": {
"PORT": 3000,
"MONGODB_URI": "mongodb://localhost:27017/TodoTest"
},
"development": {
"PORT": 3000,
"MONGODB_URI": "mongodb://localhost:27017/Todo"
}
}
Thanks for help!
回答1:
I think you miss importing env
file.
require('dotenv').config({ path: 'ENV_FILENAME' });
回答2:
I was also facing same problem after add code { useNewUrlParser: true }
in mongoose.connect() method. Problem resolved.
mongoose.connect(config.DB,{ useNewUrlParser: true }));
回答3:
To read from .env file you have to install dotenv ( npm i dotenv / yarn add dotenv) and then just add this on top of your file.
const dotenv = require("dotenv");
dotenv.config();
回答4:
Since error message returned UNDEFINED uri parameter, .toString()
will NOT work.
You can use the String()
function: String(your connection parameter)
.
Also, in if(env === 'test' || env === 'development')
try not to use (===), it is a strict equality.
Instead try if(env == 'test' || env == 'development')
. This is a loose equality. It doesn't care about the type match and will convert second operand's type to first one's type.
回答5:
This is what solved my problem. Happy Coding!
// Connect to MongoDB
mongoose.connect('mongodb://yourusername:yourpassword@ds121825.mlab.com:11025/yourmongodb', {useNewUrlParser: true});
mongoose.connection.once('open', function(){
console.log('Conection has been made!');
}).on('error', function(error){
console.log('Error is: ', error);
});
回答6:
I ran into the same problem. 1. I saved my ATLAS_URI ID to a file called .env 2. My .env file was in the wrong directory, that's how the problem cause 3. Solution: I used "ls -a" command to make sure my .env file is in the same location as my server
回答7:
I had the same problem, but then I realized that I saved the .env file as .env.txt which caused the issue. I deleted the file and created another file without .txt at the end and everything worked find.
I hope this helps.
Dhiya Aljaradi
回答8:
I had a similar issue, fixed by adding this code snippet.
mongoose.connect(config.DB,{ useMongoClient:true });
回答9:
Make sure that you have the .env file with the constants that you are using defined.
回答10:
I had same error, for me it was because I was trying to use environment variables in globalSetup
which had the file for initiating db connection.. mongoose.connect(global.__MONGO_URI__
Apparently, environment variables are not initialised yet in globalSetup
so I had to move the code somewhere else, either to setupFilesAfterEnv
or by using Async Test Environment
回答11:
const db = process.env.MONGO || 'test'
mongoose.connect(db, {
useNewUrlParser: true,
useUnifiedTopology:true,
useCreateIndex: true
}).then(()=>{
console.log("conected to mongodb");
}).catch(error => {
console.log("mongo error",error);
})
回答12:
just change the env
const db = process.env.MONGO || 'test'
回答13:
MongooseError: The uri
parameter to openUri()
must be a string, got "undefined". Make sure the first parameter to mongoose.connect()
or mongoose.createConnection()
is a string.
来源:https://stackoverflow.com/questions/51770772/mongoose-connect-first-argument-should-be-string-received-undefined