Question

我有两个型号，'产品'带'belongs_to'，'category'带'has_many'。产品有一个外键'category_id'。在product / _form形式中，我试图包含带有select选项的category字段，该选项显示类别表中的选项。但是当我点击提交时，category_id不会填充在产品表中。请帮忙......

product_controller.rb

def create
@product = Product.new(params[:product])

respond_to do |format|
  if @product.save
    format.html { redirect_to([:backend, @product], :notice => 'Product was successfully created.') }
    format.xml  { render :xml => @product, :status => :created, :location => @product }
  else
    format.html { render :action => "new" }
    format.xml  { render :xml => @product.errors, :status => :unprocessable_entity }
  end
end
end

_form.html.erb

<%= f.label :category %><br />
 <%= f.select :category_id, options_from_collection_for_select(Category.all, :id, :name), :prompt => "Select" %>

模型/ product.rb

class Product < ActiveRecord::Base

attr_accessible :name, :desc, :price, :is_special

belongs_to :category
end

模型/ category.rb

class Category < ActiveRecord::Base

attr_accessible :name

has_many :products
end

Answer 1

attr_accessible :name, :desc, :price, :is_special负责此

您应该将:category_id添加到此列表中。当您使用attr_accessbible时，所有其他字段都受到保护

外键未在create-rails 3中的表中填充

1 个答案: