How can I implement validation in Mongoose for my Node.js application?

How can I implement validation in Mongoose for my Node.js application?

You can implement validation in Mongoose by defining validation rules in your schema. For example, you can use the 'required' property to ensure a field is not empty.

Can you show me an example of a Mongoose schema with validation?

Sure! Here's a simple example:

const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  name: { type: String, required: true },
  email: { type: String, required: true, unique: true },
  age: { type: Number, min: 18 }
});

const User = mongoose.model('User', userSchema);

What happens if validation fails?

If validation fails, Mongoose will throw a validation error, and you can catch it in your application to handle it appropriately.

Can I create custom validation logic?

Yes, you can create custom validation logic using the 'validate' property in your schema. You can define a function that returns true or false based on your custom rules.