'Adding an attribute to json from joined table

I am trying to provide a json that would contain information coming from two tables:MenuItem, and Partner.

In the json below "partner_number" would actually come from the partner table.

{
    "id": 33,
    "partner_id": 12,
    "partner_number":234526,
    "item_price": "15.0",
    "item_type": "Main-meal",
    "name": "Teriyaki Chicken Donburi",
    "description": "Three eggs with cilantro, tomatoes, onions, avocados and melted Emmental cheese. With a side of roasted potatoes, and your choice of toast or croissant."
  },

This is the method I built, trying to add the information into the results.

def index
    @menu_items = policy_scope(MenuItem).joins(:partner)
    @menu_items.each do|item|
      item[:partner_number] = item.partner.partner_number
    end
  end

But it gives me this error message

ActiveModel::MissingAttributeError in Api::V1::MenuItemsController#index can't write unknown attribute partner_number

Is there a way to do it from the controller ?

Solution 1:^[1]

join method not load relationships into results. You should use includes who make a join AND load relationships

@menu_items = policy_scope(MenuItem).includes(:partner)

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Source: Stack Overflow

Solution	Source
Solution 1	alexandre-rousseau

'Adding an attribute to json from joined table

Solution 1:[1]

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Related Questions

Solution 1:^[1]