根据上图,我做了一个简单的例子。
型号:人
class Person < ApplicationRecord
belongs_to :personable, polymorphic: true
end
型号:客户
class Customer < ApplicationRecord
has_one :person, as: :personable
accepts_nested_attributes_for :person
end
控制器:customers_controller
def new
@customer = Customer.new
@customer.build_person
end
def create
@customer = Customer.new(customer_params)
@customer.save
redirect_to customers_path
end
private
def customer_params
params.require(:customer).permit(:id, person_attributes: [:id, :name, :personable_type, :personable_id])
end
查看
<%= form_with(model: customer) do |form| %>
<%= form.fields_for customer.person do |form_fields| %>
<%= form_fields.label :name %>
<%= form_fields.text_field :name %>
<% end %>
<div>
<%= form.submit %>
</div>
<% end %>
当我使用 Rails Console 运行时,没有问题,根据下面的代码。
c = Customer.create()
Person.create(name: "Saulo", personable: c)
但是当我使用视图和控制器运行时,我收到以下错误。
Unpermitted parameter: :person. Context: { controller: CustomersController, action: create, request: #<ActionDispatch::Request:0x00007fdad45e3650>, params: {"authenticity_token"=>"[FILTERED]", "customer"=>{"person"=>{"name"=>"Alisson"}}, "commit"=>"Create Customer", "controller"=>"customers", "action"=>"create"} }
我相信错误出现在 customer_params 方法中,但我没有找到解决方法。
Rails 期望
person
属性嵌套在 person_attributes
下,但表单将它们发送到 person
下。
要解决此问题,请确保
fields_for
正确设置要嵌套在 person_attributes
下的字段,格式为:
<%= form_with(model: [customer, customer.build_person]) do |form| %>
<%= form.fields_for :person_attributes, customer.person do |person_form| %>
<%= person_form.label :name %>
<%= person_form.text_field :name %>
<% end %>
<%= form.submit %>
<% end %>
这应该为嵌套属性生成正确的参数名称 (
person_attributes
)。