Level 2 (related model) scope over REST - strongloop api

Question

I found in the documentation that scopes enable you to specify commonly-used queries that you can reference as method calls on a model. Below i have a categories

Answer 1

Loopback api is based on swagger and scopes is a new concept in loopback.

Currently it doesn't have support for related methods i.e. you cannot access it from a related model i.e category (in your case) but only from model where the scope is defined i.e. game.

Thus you can achieve what you want right now using remote methods.

By Using Remote Methods. Loopback Remote Methods

common/models/category.js add the following lines.

module.exports = function(Category) {

    Category.mature = function(id, filter, callback) {
        var app = this.app;
        var Game = app.models.Game;
        if(filter === undefined){
             filter = {};
        }

        filter.where  = filter.where || {};

        filter.where.categoryId =  id;
        filter.where.mature = true;

        Game.find(filter, function(err, gameArr) {
            if (err) return callback(err);
            console.log(gameArr);
            callback(null, gameArr);
        });
    }

    Category.remoteMethod(
        'mature', {
            accepts: [{
                arg: 'id',
                type: 'number',
                required: true
            },
            {
                arg: 'filter',
                type: 'object',
                required: false
            }
            ],
            // mixing ':id' into the rest url allows $owner to be determined and used for access control
            http: {
                path: '/:id/games/mature',
                verb: 'get'
            },
            returns: {
                arg: 'games',
                type: 'array'
            }
        }
    );

};

Now in your common/models/category.json Add this to your ACL property.

.....
.....
"acls": [
  {
     "principalType": "ROLE",
     "principalId": "$everyone",
     "permission": "ALLOW",
     "property": "mature"
  }
] 

Now you can get all your game of mature type by get method http://0.0.0.0:3000/api/categories/:id/games/mature

Or you can also try the API from loopback-explorer now.