How to add custom route for user - strapi

Question

I have created a books content type containg books. Each book in the collection belongs to a user (user content type provided by Strapi).
I want to return list of books owned by authenticated user at /users/me/books endpoint. Where can I add this route and handler as there is /api/books directory containing books related route, controllers, etc. but not /api/users directory.

Answer 1

You can extend or override using the extensions system.
extensions/users-permissions/controllers
Just add the controller you want to extend or override as a .js file like so:
So to override the me endpoint under User.js you only need to define the method again:
'use strict';
module.exports = {
//Override me
async me(ctx) {
//do your thing
}
};
To extend, not override, means to add another endpoint, therefor you need to define it, add a route and set permissions for it. The routes.js files should be created at:
extensions/users-permissions/config/routes.json
Like so:
{
"routes": [
{
"method": "GET",
"path": "/users/me/books",
"handler": "User.getUserBooks",
"config": {
"policies": [],
"prefix": "",
"description": "description",
"tag": {
"plugin": "users-permissions",
"name": "User",
"actionType": "find"
}
}
}
}
The controller this time (same location as in beginning):
module.exports = {
async getUserBooks(ctx) {
//add logic
}
}
OP correctly added:
After adding custom route and controller, one has to go to Admin Panel(log in as admin)>Roles and Permission> Users-Permission. There you can find the newly added route and have to enable it by checking it.
The originals(if you need examples) are located at:
/node_modules/strapi-plugin-users-permissions/config/routes.json
/node_modules/strapi-plugin-users-permissions/controllers/User.js
I don't think you should extend the User controller as it isn't logically correct. You are trying to GET books - you should extend the book api in the same way.
From what I can tell a ContentType doesn't contain information about its creator(you're welcome to educate me if it's not true).
So to tackle that you can add to your ContentType "books" a relation to User.
Then I think you should extend the books api with a endpoint that returns books "belonging" to that user using the ctx received.
Also - check this question out
Comment if you need more info.