mongoose-filter-query

Middleware which implements a standardized format and maps an incoming http request's query params to a format which is supported by mongoose

Installation

# using npm
npm install mongoose-filter-query

# using yarn
yarn add mongoose-filter-query

Usage

const { default: mongooseFilterQuery } = require("mongoose-filter-query");

// or

import mongooseFilterQuery from "mongoose-filter-query";

.....
.....

// in your express app

app.use(mongooseFilterQuery);


// while invoking your database query

const data = await Model.find(req.query.filter).sort(req.query.sort)

console.log(data);

// rest of your code

Basic Usage Examples

'http://localhost:3000/api/users?filter[first_name]=eq(John)'

• This will return all users with the first name John
  
  

'http://localhost:3000/api/users?filter[first_name]=ne(John)'

• This will return all users with the first name not equal to John
  
  

'http://localhost:3000/api/users?filter[first_name]=reg(Jo)'

• This will return all users with the first name matching the given regular expression
  
  

'http://localhost:3000/api/users?filter[age]=gt(20)'

• This will return all users with the age greater than 20
  
  

'http://localhost:3000/api/users?filter[age]=gte(20)'

• This will return all users with the age greater than or equal to 20
  
  

'http://localhost:3000/api/users?filter[age]=lt(20)'

• This will return all users with the age less than 20
  
  

'http://localhost:3000/api/users?filter[age]=lte(20)'

• This will return all users with the age less than or equal 20
  
  

'http://localhost:3000/api/users?filter[role]=in(staff,manager)'

• This will return all users with a user role of either staff or manager
  
  

'http://localhost:3000/api/users?filter[role]=nin(staff,manager)'

• This will return all users with a user role which is neither of staff and manager
  
  

'http://localhost:3000/api/users?filter[phone]=exists(true)'

• This will return all users who have the phone number attribute in their database record
  
  

'http://localhost:3000/api/users?filter[phone]=exists(false)'

• This will return all users who doesn't have the phone number attribute in their database record
  
  

Advanced Usage Examples

'http://localhost:3000/api/users?filter[first_name]=or(eq(John),eq(Eric),reg(Kat))'

• This will return all users with a first name of John, Eric or matches the given regular expression
  
  

'http://localhost:3000/api/users?filter[age]=and(gt(20),lt(30))'

• This will return all users with an age which is between 20 and 30
  
  

Multiple Filters

• Multiple filters can be chained together with the use of the & operator
  
  

'http://localhost:3000/api/users?filter[first_name]=eq(John)&filter[age]=gt(20)'

• This will return all users with the first name John and an age greater than 20
  
  

Sorting Support

• Filters could be used along with sorting
  
• A value of 1 or asc for the sort parameter will sort the results in ascending order
  
• A value of -1 or desc for the sort parameter will sort the results in descending order
  
  

'http://localhost:3000/api/users?filter[first_name]=eq(John)&sort[age]=1'

• This will return all users with the first name John and sorted by age in ascending order
  
  

'http://localhost:3000/api/users?filter[first_name]=eq(John)&sort[age]=desc'

• This will return all users with the first name John and sorted by age in descending order