Creating record that belongs to 2 seperate tables - ruby-on-rails

Question

So I am trying to create a record that is associated with 2 tables but I cannot seem to get it to work.
Parameters: {"name"=>"asdfasd", "upc"=>"243252353", "availableOn"=>"07/12/2020", "properties"=>[{"name"=>"material", "value"=>"jean"}], "send_datum"=>{"name"=>"asdfasd", "upc"=>"243252353", "availableOn"=>"07/12/2020", "properties"=>[{"name"=>"material", "value"=>"jean"}]}}
class SendDataController < ApplicationController
protect_from_forgery with: :null_session
def save
product = Product.create(name:params[:name], upc:params[:upc].to_i, available_on:params[:availableon])
x=0
while x < params[:properties].length
property = product.properties.create(name:params[:properties][x][:name])
property.product_properties.create(value:params[:properties][x][:value])
x += 1;
end
end
end
This line is the one I cannot seam to get to work:
property.product_properties.create(value:params[:properties][x][:value])
This is my first react on rails project and understanding table assoc. has been a real challenge but I am getting there.
Models:
class Property < ApplicationRecord
belongs_to :product
has_many :product_properties
end
class Product < ApplicationRecord
has_many :properties
has_many :product_properties
end
class ProductProperty < ApplicationRecord
belongs_to :property
belongs_to :product
end
Migration:
class CreateProducts < ActiveRecord::Migration[5.2]
def change
create_table :products do |t|
t.string :name
t.string :upc
t.datetime :available_on
t.timestamps
end
end
end
class CreateProperties < ActiveRecord::Migration[5.2]
def change
create_table :properties do |t|
t.string :name
t.timestamps
end
end
end
class CreateProductProperties < ActiveRecord::Migration[5.2]
def change
create_table :product_properties do |t|
t.string :value
t.timestamps
end
end
end
class AddProductRefToProperties < ActiveRecord::Migration[5.2]
def change
add_reference :properties, :product, foreign_key: true
end
end
class AddProductRefToProductProperties < ActiveRecord::Migration[5.2]
def change
add_reference :product_properties, :product, foreign_key: true
end
end
class AddPropertiesRefToProductProperties < ActiveRecord::Migration[5.2]
def change
add_reference :product_properties, :property, foreign_key: true
end
end
Schema:
ActiveRecord::Schema.define(version: 2018_09_24_163027) do
create_table "product_properties", force: :cascade do |t|
t.string "value"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "product_id"
t.integer "property_id"
t.index ["product_id"], name: "index_product_properties_on_product_id"
t.index ["property_id"], name: "index_product_properties_on_property_id"
end
create_table "products", force: :cascade do |t|
t.string "name"
t.string "upc"
t.datetime "available_on"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
create_table "properties", force: :cascade do |t|
t.string "name"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "product_id"
t.index ["product_id"], name: "index_properties_on_product_id"
end
end
UPDATE::
It is related to the fact that the product_property is getting the property_id from property but is not getting the product_id from the product. How do I fix that?
Any help is greatly appreciated. Thanks!!

Answer 1

The issue was I had my associations set up incorrectly. As #DavidAldridge pointed out I needed to link Property to Product through product property.
class Product < ApplicationRecord
has_many :product_properties
has_many :properties, through: :product_properties
end
class ProductProperty < ApplicationRecord
belongs_to :property, required: false
belongs_to :product, required: false
end
class Property < ApplicationRecord
has_many :product_properties
has_many :products, through: :product_properties
accepts_nested_attributes_for :product_properties
end