i do some refactoring for my models and want to use "magic" of *delegate* in
my models.
Have models:
class Asset < ActiveRecord::Base
has_many :attachments, inverse_of: :asset
attr_accessible :file
end
which have file attribute. For example needs is file only as string
attribute.
And Attachment, which is polymorphic and single table inherited. There is
delegate method for file attribute to asset model.
class Attachment < ActiveRecord::Base
belongs_to :attachmentable, polymorphic: true, touch: true
belongs_to :asset, inverse_of: :attachments, autosave: true
attr_accessible :file
attr_accessible :remove_file, :file_cache
delegate :file, :file=, :file?, to: :asset, allow_nil: true
after_initialize :build_asset_model
def build_asset_model
build_asset if self.asset.blank?
end
end
These 2 models are used to store file and association to between other
models. So for example we could have:
class Category < ActiveRecord::Base
has_one :image, as: :attachmentable, dependent: :destroy, autosave: true
attr_accessible :name, :position
attr_accessible :image_attributes
accepts_nested_attributes_for :image, reject_if: :all_blank, allow_destroy:
true
end
connected with
class Category::Image < Attachment
end
When is is category with image created from console, it works:
cc = Category.new
cc.build_image
cc.name = 'name'
cc.image.file = 'filename.jpg'
cc.save
This works great! Category is created, attachment has polymorphic and STI
information, asset is created and associated to attachment.
But when is Category saved from front-end html form. It doesn't work, and
return me, that file attribute is blank. My form:
= simple_nested_form_for @category, html: { class: "form-horizontal" } do |f|
= render 'shared/error_messages', object: @category
legend= Category.model_name.human
= f.input :name
= f.simple_fields_for :image do |ima|
= ima.input :file
.form-actions
= f.button :submit, :class => 'btn-primary', data: { disable_with:
t('processing') }
'
= link_to t('.cancel', :default => t("helpers.links.cancel")),
categories_path, :class => 'btn'
controller actions: (using CanCan is automaticaly initialized)
def new
# build location
@category.build_image
respond_with @category
end
def create
@category.build_image unless @category.image
@category.save
respond_with @category
end
category params
params[:category]
=> {"name"=>"name",
"image_attributes"=>{"file"=>"filename.jpg"}}
Some help please? Thank you so much.
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