Question

I’ve got User has_one Shop & Shop has_many Branches.

When I do this:

class UsersController < ApplicationController
  def show
    @user = User.find(params[:id])
    @shop = @user.shop
    @branches = @shop.branches
  end
...

The @user & @shop instance variable works in view, but @branches gives me the error:

undefined method `branches' for nil:NilClass

Application Trace | Framework Trace | Full Trace
app/controllers/users_controller.rb:13:in `show'

---

However, if I discard @branches in the controller:

class UsersController < ApplicationController
  def show
    @user = User.find(params[:id])
    @shop = @user.shop
  end
...

….and use this in the view:

@shop.branches

….it works! It’s kinda tiring to use @shop.branches in the view all the time, so I prefer to just use @branches.

Answer 1

The message indicates that @shop is nil in the controller. If with the same request it works in the view, it means that certainly @shop has been set somewhere else after the controller.