MongoDB mongoose Deprecation Warning

mongoose.connect(process.env.DATABASE, {
useNewUrlParser: true,
useCreateIndex: true,
useFindAndModify: false,
useUnifiedTopology: true,
})
.then(() => {
console.log("DB connected");
})
.catch((err) => console.log(`DB connection Err`, err));

here
`connectionString` is your DB Address
```javascript
mongoose
.connect(connectionString, {
useNewUrlParser: true,
useUnifiedTopology: true,
useCreateIndex: true,
})
.then(
app.listen(port, () => {
console.log(`server started on port ${port}`);
})
)
.catch((err) => console.log(err));
```

When we make connection request to connect mongo db we just have to add one more key value pair into that callback function

useCreateIndex:true

inside the function

mongoose.connect(config.DB_URI, {
useNewUrlParser: true,
useUnifiedTopology: true,
useCreateIndex:true
}

**Am using mongoose version 6.8.0 and this worked for me**

```
//connect mongodb
mongoose.set('strictQuery', false);
mongoose.connect('url',(err,db) => {

if(err){
console.log(`Database not connected : ${err}`)
}else{
console.log('Database connected Successfully')
}
})
```

if depreciation error occurred to you while trying to connect to your mongodb database, if you are storing your connection strings in an environment variables file, like this

//database connection string saved to a env variable
DB='mongodb://127.0.0.1:27017/players'

use the actual ip address instead of the common way of defining it:

DB='mongodb://localhost/players'

Then, when connecting to the database you can use, this code:

//requiring the database driver mongoose
const mongoose = require('mongoose');

//connecting to mongodb
mongoose.connect(process.env.DB)
.then(() => console.log('Connected to mongodb Database...'))
.catch((err) => console.error('Unable to connect to MongoDB...', err));

This definitely, worked for me..am using locally on my machine so if you are using server based database then your database connnection string will not be the same as mine.