I am running a database connection to mongoDB using mongoose(v 8.6.2) in next.js and it keeps throwing an error of .connect not being a function, this is my database.js file
import mongoose from 'mongoose';
let isConnected = false; // track the connection
export const connectToDB = async () => {
if(isConnected) {
console.log('MongoDB is already connected');
return;
}
try {
await mongoose.connect(process.env.MONGODB_URI, {
dbName: "share_prompt",
useNewUrlParser: true,
useUnifiedTopology: true,
strictQuery: true
})
isConnected = true;
console.log('MongoDB connected')
} catch (error) {
console.log(error);
}
}
I’ve tried checking mongoose documentation to see if there’s any new syntax for .connect, but I’ve gotten nothing
2
Answers
It is happening because to call a Server Action in a Client Component, create a new file and add
use server
directive at the top of it. All exported functions within the file will be marked as Server Actions that can be reused in both Client and Server Components.Just do this.
If you are calling a Server Action in a Client Component then try the above code, it will work.
Check the
link
for detailed information.EDIT :-
In basic
Node.js
projects, you can connect to the database in the entry fileindex.js
and you don’t call that again.But inNextjs
, there isn’t any entry file. Because all the pages and route handlers are specific to the pages or API routes, you can use the experimental feature calledinstrumentation
.Enable the instrumentation feature by adding the code below to the
next.config.js
file.Create a new file
instrumentation.js
at the root of project or insidesrc
directory if it exist. And add the code below.You just need to export the
register
function and call theconnectToDB()
function inside it.If the connection is successful, you will see the message
MongoDB is already connected
in the console even before you access any page or api route.For detailed information you can visit this
[link][2]
where you will get each & every aspect about how to connect withMongoDB
usingmongoose
.I think problem might be due to trying to connect mongo db from client side. There are some points to keep in mind.
Ensure that the Mongoose connection is only initialized on the server side, not on the client side, since Next.js has both client and server components.
It’s important to cache the database connection to prevent re-establishing the connection on every request in a serverless environment.