Create records with associated tables in Rails - ruby-on-rails

Question

I am new to ruby on rails and don't understand how to create and save records using associated tables. I want the controller to take the data create a product record and then create as many property and product properties associated with that product. The property and product property have a one to one relationship. The product can have many properties and product properties.
Properties and product properties are coming in like this:
{"name"=>"color", "value"=>"red"}
{"name"=>"material", "value"=>"cotton"}
My controller works for the creation of the product but I am unsure how to create a loop that will build as may associated product and product properties that come in the array sent from the client.
My controller now:
class SendDataController < ApplicationController
protect_from_forgery with: :null_session
def hi
product = Product.new
product.name = params[:name]
product.upc = params[:upc].to_i
product.available_on = params[:availableon]
product.save
end
end
Below are my models:
class Product < ApplicationRecord
has_many :propertys, dependent: :destroy
has_many :product_propertys, dependent: :destroy
end
class Property < ApplicationRecord
belongs_to :product
has_one :product_property, dependent: :destroy
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 CreateProductProperties < ActiveRecord::Migration[5.2]
def change
create_table :product_properties do |t|
t.string :value
t.belongs_to :property
t.belongs_to :product
t.timestamps
end
end
end
class CreateProperties < ActiveRecord::Migration[5.2]
def change
create_table :properties do |t|
t.string :name
t.belongs_to :product
t.timestamps
end
end
end
schema:
ActiveRecord::Schema.define(version: 2018_09_22_140824) do
create_table "product_properties", force: :cascade do |t|
t.string "value"
t.integer "property_id"
t.integer "product_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
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.integer "product_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["product_id"], name: "index_properties_on_product_id"
end
end
Thanks for any help you can give a new guy!

Answer 1

Your Product Model plurality required, has_many properties & equally has_many product_properties.
Your Property schema will need product_id as an integer. i would avoid using has_one it can get messy, just use has_many or you may require a has_many through
Your ProductProperty Model You'll also need product_id integer & property_id integer adding them as separate migration.
rails db:create add_product_id_to product_properties, product_id:integer
check the migration file product_id that the attribute is in the file
rails db:migrate
Restart server & test in the console.
Once the Models speak, instantiate a Product object, bring it across into Properties & ProductProperties through the respective controllers by setting & in turn making the SendDataController obsolete unless your logic requires this.