NodeJS – Learners Store

Solution: zsh: command not found: mongod

If MongoDB is not installed properly in the system, then this error comes on command prompt. To fix this problem follow the below steps.

Try to install MongoDB by using Homebrew. Before that ensure Homebrew is installed or not by using the following command.

brew --version

If Homebrew is not installed, install it. After completion of Homebrew installation, Add MongoDB to Homebrew’s list of packages by using the following command.

brew tap mongodb/brew

Install the latest version of MongoDB with the following command.

brew install mongodb-community@6.0

Now check with the command mongod in the command prompt. Now it won’t show the error message as command not found.

Mongoose Model.find() method with query parameter.

We can use query parameter with Model.find() method as follows.

userRouter.route('/users').get((req, res) => {
    const { query } = req; 
    Users.find(query).then((err, books) => {
        if(err){
            return res.send(err)
        }
            return res.json(books)
    });
})

MongooseError: Model.find() no longer accepts a callback

The use of callback functions has been deprecated in the latest version of Mongoose.

we need to use either Promises or async/await syntax.

Particularly if Model.find throws an error then we can replace it as follows.

Model.find().then((err, data) => {
        if(err){
            return res.send(err)
        }
            return res.json(data)
    });