How to check if mongoose ( MongoDb ) is installed or not

To verify if a project has installed mongoose, follow these steps:

1. Check the package.json file: This file lists all dependencies of the project. Locate package.json in the project's root directory and check if mongoose is present in the dependencies or devDependencies object. For example:

json
"dependencies": {
  "express": "^4.17.1",
  "mongoose": "^5.10.9"
}

If mongoose is found in the dependencies section, it indicates that the project has installed mongoose.

1. Use npm or yarn command-line tools: If you use npm, run the following command in the project's root directory to list all installed packages, including mongoose:

sh
npm list mongoose

If you use yarn, run:

sh
yarn list --pattern mongoose

Both commands will display the installed version of mongoose in the console if it is present.

1. Check the node_modules directory: Navigate to the project's node_modules directory and verify if a folder named mongoose exists. If it does, it confirms that mongoose is installed locally in your development environment.

sh
ls node_modules | grep mongoose

If none of the above steps confirm mongoose, it likely means the package is not installed. If you need to install mongoose, use the following commands:

For npm users:

sh
npm install mongoose

For yarn users:

sh
yarn add mongoose

After confirming that mongoose is installed, proceed with the project documentation or development guide for subsequent steps.