Rails - Nested Form Not Saving - ruby-on-rails

Question

I have problem and I can't figure out how to solve this, I tried trace every character on codes but I think I didn't get mistake on code
I have 3 models : Product, AttributeProduct and AttributeProductRelation, and relations :
class Product < ActiveRecord::Base
has_many :attribute_product_relations
has_many :attribute_products, through: :attribute_product_relations
accepts_nested_attributes_for :attribute_product_relations, allow_destroy: true
end
class AttributeProduct < ActiveRecord::Base
has_many :attribute_product_relations
has_many :products, through: :attribute_product_relations
end
class AttributeProductRelation < ActiveRecord::Base
belongs_to :product
belongs_to :attribute_product
end
And on ProductsController I have this :
def new
#product = Product.new(id: generate_product_id)
2.times { #product.attribute_product_relations.build }
end
def create
#store = current_user.store
#product = #store.products.build(new_product_params)
respond_to do |format|
if #product.save
format.html { redirect_to red_path, notice: I18n.t('notice.create_product_success') }
format.json { render :show, status: :created, location: #product }
else
format.html { render :new }
format.json { render json: #product.errors, status: :unprocessable_entity }
end
end
end
private
def new_product_params
params.require(:product).permit(:id, :name :description, attribute_product_relations_attributes: [:id, :product_id, :attribute_product_id, :value])
end
And this is a form :
<%= nested_form_for #product, html: { class: "form-horizontal" } do |f| %>
<%#= order stuff here %>
<%= f.fields_for :attribute_product_relations do |attribute_product_relation_form| %>
<div class="row">
<div class="col-xs-6 col-md-6">
<%= attribute_product_relation_form.hidden_field :attribute_product_id, value: 1 %>
<label class="control-label">size</label>
</div>
<div class="col-xs-6 col-md-6">
<%= attribute_product_relation_form.text_field :value, {class: "form-control text select_short" %>
</div>
</div>
<% end %>
<% end %>
And this is a log when I submit a form :
Started POST "/products" for 127.0.0.1 at 2015-10-09 16:11:51 +0700
Processing by ProductsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"WzSKpXm4AFhETrPyv0Ez/WohxoAMMiiRRc6CNhgIPC8=", "product"=>{"id"=>"2132051", "name"=>"T-shirt", "attribute_product_relations_attributes"=>{"0"=>{"attribute_product_id"=>"1", "value"=>"Medium"}, "1"=>{"attribute_product_id"=>"1", "value"=>"SMALL"}} , "description"=>"cool t-shirt"}, "button"=>""}
You can see attribute_product_relations_attributes are exists on parameter, So I'm use pry-debugger gems to trace new_product_params method and I just get this :
[1] pry(#<ProductsController>)> new_product_params
=> {"id"=>"2132051",
"name"=>"T-shirt"
"description"=>"cool t-shirt"}
I can't see attribute_product_relations_attributes on new_product_params and didn't save to database.

Answer 1

As you are have has many relationship in new_product_params methods, it is required to make permit for array of attribute_product_relations_attributes. So, your should refactor new_product_params method to
def new_product_params
params.require(:product).permit(:id, :name :description, attribute_product_relations_attributes: [ [:id, :product_id, :attribute_product_id, :value] ])
end
I think this will help.