Generally to install MongoDB we use the following command.
npm install mongodbIf you want to install specific version of mongodb, for example if you want install 3.4.0 version you can use the following command.
npm install mongodb@3.4.0In the same way if we want to install any version of mongodb we can use this format.
npm install mongodb@required_versionIf 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 --versionIf 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/brewInstall the latest version of MongoDB with the following command.
brew install mongodb-community@6.0Now check with the command mongod in the command prompt. Now it won’t show the error message as command not found.
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)
});
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