Nested attribute not saving in rails 4.

[MohdAnas]

I am using mexicon sofa(1.11.0) in rails 4 and trying to save the nested attributes but it is not saving.
The problem is:

gallery.rb

class Gallery < ActiveRecord::Base
has_attached_file :top_image, :styles => {:thumb => "200x200>" }
has_many :gallery_images, :dependent => :destroy
accepts_nested_attributes_for :gallery_images, :reject_if => lambda { |a| a[:content].blank? }, :allow_destroy => true
end

galery_image.rb

class GalleryImage < ActiveRecord::Base
 has_attached_file :image, :styles => {:thumb => "200x200>" }
 belongs_to :gallery
end

_form.html.haml

= form.text_field :title
= form.text_field :description
= form.file_field :top_image
= form.fields_for :gallery_images do |builder|
= render "gallery_image_fields", :form => builder
 %p= link_to_add_fields "Add Image", form, :gallery_images
 .form-actions
   = form.submit :class => 'btn btn-primary'

_gallery_image_fields.html.haml

= form.file_field :image
= form.hidden_field :_destroy
= link_to_remove_fields "Remove Image", form 

gallery_controller.rb

def gallery_params
  params.fetch(:gallery, {}).permit(:title, :description, :top_image, gallery_images_attributes: [:id, :image, :_destroy])
 end

Parametrs in the server logs

 Parameters: {"utf8"=>"✓", "authenticity_token"=>"d7Zb8wVKVU6omi9Aicvr4WIgz+TcN7Cl40w9wneBhas=", "gallery"=>{"title"=>"gfhgf", "description"=>"hfghfghgf", "gallery_images_attributes"=>{"1390804105999"=>{"image"=>#<ActionDispatch::Http::UploadedFile:0xcaa7d94 @tempfile=#<Tempfile:/tmp/RackMultipart20140127-3901-tz2cb9>, @original_filename="abc.jpg", @content_type="image/jpeg", @headers="Content-Disposition: form-data; name=\"gallery[gallery_images_attributes][1390804105999][image]\"; filename=\"abc.jpg\"\r\nContent-Type: image/jpeg\r\n">, "_destroy"=>"false"}}}, "commit"=>"Create Gallery"}

Everything is running fine even it is sending the image attribute but it is not saving. Can anyone tell me where is the problem?

[GBH]

This doesn't really have anything to do with Blog, but I don't see anything particularly wrong with your code. I'd try relaxing params to params.fetch(:gallery, {}).permit! and see if that helps.

[MohdAnas]

Thanks for your reply,, but it is still not working. In the server logs i am getting

{"utf8"=>"✓", "authenticity_token"=>"N86EVxHFq6/8KWnucXhrJD4akFU+vssNXm4ILMK7dXY=", "gallery"=>{"title"=>"yuiyu", "description"=>"iyuiyuiyu", "top_image"=>#<ActionDispatch::Http::UploadedFile:0xc64ed9c @tempfile=#<Tempfile:/tmp/RackMultipart20140128-3127-hfzayw>, @original_filename="Screenshot from 2013-12-13 14:35:04.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"gallery[top_image]\"; filename=\"Screenshot from 2013-12-13 14:35:04.png\"\r\nContent-Type: image/png\r\n">, "gallery_images_attributes"=>{"1390884783725"=>{"image"=>#<ActionDispatch::Http::UploadedFile:0xc64ecc0 @tempfile=#<Tempfile:/tmp/RackMultipart20140128-3127-s3mfcw>, @original_filename="Screenshot from 2013-12-13 14:34:38.png", @content_type="image/png", @headers="Content-Disposition: form-data; name=\"gallery[gallery_images_attributes][1390884783725][image]\"; filename=\"Screenshot from 2013-12-13 14:34:38.png\"\r\nContent-Type: image/png\r\n">, "_destroy"=>"false"}}}, "commit"=>"Create Gallery", "action"=>"create", "controller"=>"admin/galleries"}

[GBH]

That's odd. Watch the log. Does it even attempt to do inserts?