rails_model_form_v2

rails_model_form_v2

module ModelForm
  extend ActiveSupport::Concern

  included do
    class_attribute :model_class
    self.model_class = self.superclass

    class_attribute :permitted_attrs
    self.permitted_attrs = []
  end

  module ClassMethods
    def model_name
      model_class.model_name
    end

    def permit(*permitted_attrs)
      self.permitted_attrs.concat permitted_attrs
    end

    def wrap(model)
      model.becomes(self).tap do |form|
        form.send :set_model, model
      end
    end

    def form_field(name, options={})
      if options[:accessor]
        attr_accessor name
      end

      permit name
    end

    def form_fields(*names, **options)
      names.each do |name|
        form_field(name, options)
      end
    end
  end

  def assign_attributes(attrs = {})
    if attrs.respond_to?(:permitted?)
      attrs = attrs.permit(*permitted_attrs)
    end
    super(attrs)
  end

  def model
    @model ||= self.becomes(self.class.model_class)
  end

  private

  def set_model(model)
    @model = model
    if respond_to?(:load_model, true)
      send(:load_model, model)
    end
  end
end