query mongodb
db.inventory.find( {} )
query mongodb
db.inventory.find( {} )
query mongodb
const Books = require("Books.js") async getBooks(req, res, next) { let query; // Copy req.query let reqQuery = { ...req.query }; // Fields to exclude const removeFields = ["select", "sort"]; // Loop over removeFields and delete them from reqQuery removeFields.forEach(param => delete reqQuery[param]); // Create query string let queryStr = JSON.stringify(reqQuery); // Create operators ($gt, $gte, etc) queryStr = queryStr.replace( /b(gt|gte|lt|lte|in)b/g, match => `$${match}` ); // Find resource query = Books.findQuery(JSON.parse(queryStr)); // Select Fields if (req.query.select) { const fields = req.query.select.split(",").join(" "); query = query.select(fields); } // Sort if (req.query.sort) { const sortBy = req.query.sort.split(",").join(" "); query = query.sort(sortBy); } else { query = query.sort("-createdAt"); } // Pagination const page = parseInt(req.query.page, 10) || 1; const limit = parseInt(req.query.limit, 10) || 10; const startIndex = (page - 1) * limit; const endIndex = page * limit; const total = await Books.countDocuments(); query = query.skip(startIndex).limit(limit); // Executing query let books = await query; // Pagination result const pagination = {}; if (endIndex < total) { pagination.next = { page: page + 1, limit, }; } if (startIndex > 0) { pagination.prev = { page: page - 1, limit, }; } res.status(200).json({ success: true, count: books.length, pagination, data: books, }); }
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