Difference between new mongoose.schema and mongoose.schema

In Mongoose, mongoose.Schema and new mongoose.Schema are two different ways to create a schema, but they are equivalent in terms of functionality.

mongoose.Schema

mongoose.Schema is a static method of the Mongoose module that returns a new schema object. When you call mongoose.Schema, you are creating a new schema object that you can then use to define your model's structure.

Example:

const mongoose = require('mongoose');
const schema = mongoose.Schema({
  name: String,
  age: Number
});

In this example, mongoose.Schema is called with an object literal that defines the schema's structure. The resulting schema object can then be used to create a model.

new mongoose.Schema

new mongoose.Schema is a constructor function that creates a new schema object. When you call new mongoose.Schema, you are creating a new instance of the Schema class, which is a subclass of Object.

Example:

const mongoose = require('mongoose');
const schema = new mongoose.Schema({
  name: String,
  age: Number
});

In this example, new mongoose.Schema is called with an object literal that defines the schema's structure. The resulting schema object is an instance of the Schema class and can be used to create a model.

Key differences

While both mongoose.Schema and new mongoose.Schema create a new schema object, there are some subtle differences:

In practice, both approaches are equivalent, and you can use either one to create a schema. However, if you need to create multiple schema instances or want more control over the schema creation process, using new mongoose.Schema might be a better choice.