What is the best way to filter out empty arrays when executing a multiple get request in MongoDB containing a mix of strings and numbers?

Question

What is the best way to filter out empty arrays when executing a multiple get request in MongoDB containing a mix of strings and numbers?

I am currently working on a solution that involves the following code:

export const ProductsByFilter = async (req, res) => {

  const {a, b, c} = req.query

  let query = {}

  if (a) {
    query.a = a;
  }
  if (b) {
    query.b = b;
  }
  if (c) {
    query.c = c;
  }

  const products = await Product.find(query);

  res.status(200).json(products);
}

The challenge I'm facing is that a is a String and b is a Number, so they work fine when making multiple requests even if one is empty. However, c is an array and it's not functioning properly. How can I adjust the logic to make c work as well, while still allowing for multiple query requests that ignore empty or null parameters?

javascript mongodb express mongoose

Answer 1

Answer №1

After receiving a user's code as a response, I made some modifications to ensure its full functionality. The addition of $in in the code snippet below allowed me to successfully execute the query with an array:

    export const ProductsByFilter = async (req, res) => {

    const {a, b, c} = req.query

    let query = {}

    if (a) {
       query.a = a;
    }
    if (b) {
       query.b = b;
    }
    if (c?.length) {
       query.c ={$in:c};
    }

    const products = await Product.find(query);

    res.status(200).json(products);
                                                          }

Answer 2

After receiving a user's code as a response, I made some modifications to ensure its full functionality. The addition of $in in the code snippet below allowed me to successfully execute the query with an array:

    export const ProductsByFilter = async (req, res) => {

    const {a, b, c} = req.query

    let query = {}

    if (a) {
       query.a = a;
    }
    if (b) {
       query.b = b;
    }
    if (c?.length) {
       query.c ={$in:c};
    }

    const products = await Product.find(query);

    res.status(200).json(products);
                                                          }

What is the best way to filter out empty arrays when executing a multiple get request in MongoDB containing a mix of strings and numbers?

Answer №1

Similar questions

Displaying JSON array data across three different pages using AngularJS and Ionic framework

The Angular framework may have trouble detecting changes made from global window functions

What is the reason behind having all bindings resolved during each $digest cycle?

automatically changing radio button selection based on dropdown choice

Issues encountered when attempting to append the array objects to HTML using $.getjson

Using useState in ReactJS does not allow setting state data

Validation of textfields using React.js

Optimal approach for integrating enum with Angular, Mongoose, and Node.js

Creating an empty array within an object in JavaScript

Explore the capabilities of Vue.js by creating multiple JavaScript classes within your application

I'm looking to dive into the world of MongoDB and NoSQL databases and need a

Struggling to display my array data retrieved from the database on my Angular 5 page

I encountered the following error message: Unable to access properties of undefined (specifically 'header'). I am currently attempting to utilize middleware to retrieve user data

Tips for detecting a new day with server-side JavaScript

Posting several pictures with Protractor

Using JavaScript, what is the process for getting the value of a child node within Firebase

Can you define a secondary index in MongoDB and review the execution plan when using an update statement?

How can I send dynamic props between pages using Next.js?

Implementing Gatsby-js for client-side JavaScript directly within a blog post is a powerful

Aframe Descend Rotation