For Solidus: making Property selectable field

app-models-product_property_decorator.rb

Spree::ProductProperty.class_eval do
  belongs_to :value_object, class_name: 'Spree::PropertyValue', foreign_key: :value_id

  before_validation { self.value = value_object.value if value_id and changes[:value_id] }
end

app-models-property_decorator.rb

Spree::Property.class_eval do
  enum data_type: [:textable, :selectable]
  has_many :property_values, :class_name => 'Spree::PropertyValue', foreign_key: :property_id

  accepts_nested_attributes_for :property_values, allow_destroy: true
end

app-models-property_value.rb

class Spree::PropertyValue < ActiveRecord::Base
  belongs_to :property, :class_name => 'Spree::Property'
end

db-migrate-files.rb

# Step 1
class CreateSpreePropertyValues < ActiveRecord::Migration
  def change
    create_table :spree_property_values do |t|
      t.integer :property_id, index: true
      t.string :value

      t.timestamps null: false
    end
  end
end


# Step 2
class AddDataTypeToSpreeProperty < ActiveRecord::Migration
  def change
    add_column :spree_properties, :data_type, :integer, default: 0
  end
end


# Step 3
class AddValueIdToSpreeProductProperty < ActiveRecord::Migration
  def change
    add_column :spree_product_properties, :value_id, :integer, index: true
  end
end

overrides.rb

Deface::Override.new(virtual_path: 'spree/admin/properties/index',
                     name: 'add_data_type_to_admin_properties_index_header',
                     insert_after: '[data-hook="listing_properties_header"] th:nth-child(2)',
                     text: <<ERB)
      <th><%= Spree::Property.human_attribute_name(:data_type) %></th>
ERB

Deface::Override.new(virtual_path: 'spree/admin/properties/index',
                     name: 'add_data_type_to_admin_properties_index_row',
                     insert_after: '[data-hook="listing_properties_row"] td:nth-child(2)',
                     text: <<ERB)
      <td style="padding-left:1em"><%= property.data_type %></td>
ERB

Deface::Override.new(virtual_path: 'spree/admin/product_properties/_product_property_fields',
                     name: 'make_property_value_selectable_when_property_is_selectable',
                     replace_contents: '[data-hook="product_property"] .value',
                     text: <<ERB)
      <%- prop = f.object.property %>
      <%- if prop&.selectable? %>
        <%= f.collection_select :value_id, prop.property_values, :id, :value %>
      <%- else %>
        <%= f.text_field :value %>
      <%- end %>
ERB

Deface::Override.new(virtual_path: 'spree/admin/product_properties/_product_property_fields',
                     name: 'property_name_is_not_modifiable_in_product_property_edit_page',
                     replace_contents: '[data-hook="product_property"] .property_name',
                     text: <<ERB)
    <%- if f.object.persisted? %>
      <%= f.object.property_name %>
      <%= f.hidden_field :property_name %>
    <%- else %>
      <%= f.collection_select :property_name, Spree::Property.all, :name, :presentation, {prompt: true}, {id: 'product-select-new-property'} %>
    <%- end %>
ERB