Mongoose Pagination & Aggregate

Pagination Plugins:

• You're utilizing two pagination plugins provided by the mongoose-pagination-v2 package: mongoosePlugin and mongooseAggregatePlugin. These plugins enhance your mongoose schema with pagination capabilities for regular queries and aggregate queries respectively.

Pagination Methods:

• getAggregatedPaginatedData: This method is used to fetch paginated data from the MongoDB collection. It takes an object as an argument with properties like model (the mongoose model to query) and query (an array of query conditions). It returns paginated data based on the provided query conditions.
• getPaginatedData: Though not explicitly used in your code, it's likely a similar method provided by the pagination package for fetching paginated data from regular (non-aggregated) queries.

These methods and plugins streamline pagination handling in your application, making it easier to implement and manage pagination for mongoose queries and aggregations.

const mongoose = require('mongoose');
const { mongoosePlugin, mongooseAggregatePlugin, getAggregatedPaginatedData, getPaginatedData } = require('mongoose-pagination-v2');

const express = require('express');
const app = express();

mongoose.connect(process.env.MONGO_URI)
.then(() => console.log('Connected to MongoDB'))
.catch((err) => console.log('Failed to connect to MongoDB', err));

// any key value allowed
const UserSchema = new mongoose.Schema({}, { strict: false });

UserSchema.plugin(mongoosePlugin);
UserSchema.plugin(mongooseAggregatePlugin);

const UserModel = mongoose.model('User', UserSchema);

app.get('/', async (req, res) => {
    // pagination without aggregate query
    // const data = await getPaginatedData({ model: UserModel, query: {}, page: 1, limit: 10 });

    // pagination with aggregate query
    const data = await getAggregatedPaginatedData({ model: UserModel, query: [], page: 1, limit: 10 });
    res.send(data);
});

app.listen(3000, () => {
    console.log('Server is running on http://localhost:3000');
});