使用复选框更新嵌套表单我无法更新表。我收到以下消息:
未允许的参数:: category ActionController :: Parameters {“name”=>“Flux Capacitor”,“price”=>“19.55”}允许:true
我尝试了不同的方法通过允许的参数来解决这个问题,包括一个:category
参数,如下所示:
def product_params
params.require(:product).permit(:id, :name, :price, :category, categories_attributes: [:id, :name, :category], categorizations_attributes: [:id, :product_id, :category_ids, :category])
end
我的模特
class Product < ApplicationRecord
has_many :categorizations
has_many :categories, through: :categorizations
accepts_nested_attributes_for :categories, reject_if: proc {|attributes| attributes['name'].blank?}
accepts_nested_attributes_for :categorizations
end
class Categorization < ApplicationRecord
belongs_to :product, inverse_of: :categorizations
belongs_to :category, inverse_of: :categorizations
end
class Category < ApplicationRecord
has_many :categorizations
has_many :products, through: :categorizations, inverse_of: :category
end
class ProductsController < ApplicationController
def edit
@categories = Category.all
end
def new
@product = Product.new
end
def create
@product = Product.new(product_params)
if @product.save
flash[:notice] = 'Product succesfully created'
redirect_to products_path
else
flash[:notice] = 'Product was not created'
render 'edit'
end
end
def update
if @product.update(product_params)
flash[:notice] = "Product succesfully updated"
redirect_to products_path
else
flash[:notice] = 'Product was not updated'
render 'edit'
end
end
应用程序/视图/产品/ edit.html.erb
<%= simple_form_for(@product) do |f| %>
<%= f.input :name %>
<%= f.input :price %>
<%= f.simple_fields_for @product.categories do |cats| %>
<%= cats.collection_check_boxes :ids, Category.all, :id, :name, collection_wrapper_tag: :ul, item_wrapper_tag: :li %>
<% end %>
<%= f.button :submit %>
<% end %>
这似乎是一种常见的东西,rails和/或simple_form应该以更加内置的方式提供。我错过了一些明显的东西吗
如果我正确理解你,你应该能够在不使用accepts_nested_attributes_for或simple_fields_for的情况下做到这一点。尝试这样的事情:
<%= simple_form_for(@product) do |f| %>
<%= f.input :name %>
<%= f.input :price %>
<%= f.association :categories, as: :check_boxes %>
<%= f.button :submit %>
<% end %>
你强大的参数应该是这样的:
def product_params
params.require(:product).permit(:id, :name, :price, { category_ids: [] }])
end