Get a belongs_to relationship from class Ruby on Rails

Question

Here are my models:

class OrderItem < ApplicationRecord
   belongs_to :order
   belongs_to :product
end

class Order < ApplicationRecord
   has_many :order_items
end

Here is my controller:

def index
    orders = Order.where(nil)
    render json: {'orders': orders}, include: 
    ['order_items'], status: :ok
end

I want to also include the product in the order_items. How can I achieve this to get the following JSON:

    {
        "id": 2,
        "order_items": [
            {
                "id": 1,
                "product": {
                    "name": "abc"
                },
            }
        ]
    },

Is is correct belongs_to :product? A order has many order items and the order item has one product? — amarradi, Mar 27 '18 at 08:28
create_table "order_items", force: :cascade do |t| t.integer "order_id" t.integer "product_id" t.index ["order_id"], name: "index_order_items_on_order_id" t.index ["product_id"], name: "index_order_items_on_product_id" — An Nguyen, Mar 27 '18 at 08:47

score 0 · Answer 1 · answered Mar 27 '18 at 08:38

0

You can reach this with changing include: ['order_items'] to include: ['order_items', 'order_items.product'].

More details you can get here.

answered Mar 27 '18 at 08:38

nautgrad

414
2
8

I tried that, it gave me NoMethodError: undefined method – An Nguyen Mar 27 '18 at 08:45

score 0 · Accepted Answer · answered Mar 27 '18 at 08:46

0

I have been able to solve this by changing include: ['order_items'] to include: {'order_items': {include: 'product'}}

answered Mar 27 '18 at 08:46

An Nguyen

383
1
3
12

Get a belongs_to relationship from class Ruby on Rails

2 Answers2