预期的ProductField，出现数组问题 [英] Expected ProductField, got array issue

问题描述

我有一个Rails 4应用程序，该应用程序具有如下所示的params块:

I have a rails 4 application that has a params block that looks like:

def store_params
   params.require(:store).permit(:name, :description, :user_id, products_attributes: [:id, :type, { productFields: [:type, :content ] } ])
end

但是我遇到了错误:

ActiveRecord::AssociationTypeMismatch in StoresController#create
ProductField expected, got Array

我要插入的参数如下:

Parameters: {"utf8"=>"✓", "store"=>{"name"=>"fdsaf", "description"=>"sdfd","products_attributes"=>{"0"=>{"productFields"=>{"type"=>"", "content"=>""}}}}, "type"=>"Magazine", "commit"=>"Create store"}

我的模特是

1. 商店(有一个has_many :products)
2. 产品(具有has_many :productFields和belongs_to :store)
3. ProductField(具有belongs_to :product)

1. Store (has a has_many :products)
2. Product (has a has_many :productFields and belongs_to :store)
3. ProductField (has a belongs_to :product)

我的视图如下:

<%= f.fields_for :products do |builder| %>
  <%= render 'product_fields', f: builder %>
<% end %>

，然后是product_fields部分:

and then the product_fields partial:

<%= f.fields_for :productFields do |builder| %>
  <%= builder.text_field :type%>
  <%= builder.text_area :content %>
<% end %>

推荐答案

确保您的产品和商店模型具有:

Make sure your Product and Store models have:

accepts_nested_attributes_for

在他们里面.

然后，如果您这样调用嵌套的fields_for，请确保您在控制器中构建它们，如下所示:

Then, if your calling nested fields_for like that, make sure you build them (in the controller), something like:

product = @store.products.build
product.productFields.build

这篇关于预期的ProductField，出现数组问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！