why do you show code of Product controller, if you create new Line_Item?
понедельник, 18 марта 2013 г., 11:46:48 UTC+4 пользователь Ruby-Forum.com
User написал:
>
> Hey.
>
> After adding the item, an error undefined method `key?' for nil:NilClass
>
> its my controller products:
>
> ...
> # GET /products/new
> # GET /products/new.json
> def new
> @product = Product.new
>
> respond_to do |format|
> format.html # new.html.erb
> format.json { render json: @product }
> end
> end
> ...
>
> model product:
>
> lass Product < ActiveRecord::Base
> has_many :line_items
> before_destroy : ensure_not_referenced_by_any_line_item
>
> attr_accessible :title, :description, :image_url, :price
>
> validates :title, :description, :image_url, :price, presence: true
> validates :price, numericality: {greater_than_or_equal_to: 0.01}
> validates :title, uniqueness: true
> # validates :image_url, allow_blank: true, format: {
> # with: %r{ \.(gif|jpg|png)$}i,
> #message: 'gif, jpg png. '
> #}
>
> def ensure_not_referenced_by_any_line_item
> if line_items.empty?
> return true
> else
> errors.add(:base, " существуют товарные позиции")
> return false
> end
>
> end
>
> class CreateProducts < ActiveRecord::Migration
> def change
> create_table :products do |t|
> t.string :title
> t.text :description
> t.string :image_url
> t.decimal :price
>
> t.timestamps
> end
> end
> end
>
> How solve this problem?
>
> --
> Posted via http://www.ruby-forum.com/.
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