Paperclip::Staging

Allow Paperclip to pass attachments as data-uri on unsaved records. Useful when dealing with forms and validation errors.

Imagine you have two fields on a model - name and attachment. Let's say that name has a validation. If you edit an object and change both name and attachment, but the new name doesn't meet the validation, then you lose the new attachment.

With paperclip-staging, the attachment is preserved using a hidden field. It is also available with staged_url(style_name) (instead of regular url(style_name)) calls, using data-uri encoding - which is useful if you want to display current value for the attachment/image.

You can check the example project.

Add this line to your application's Gemfile:

gem 'paperclip-staging'

And then execute:

$ bundle

Or install it yourself as:

$ gem install paperclip-staging

1. Add a new hidden field in the form, named <attachment_name>_staging.

   f.hidden_field :file_staging

   or

   f.input :file_staging, as: :hidden for simple_form

2. Add this field as a valid form param:

   attr_accessible :file_staging

   or

   params.require(xxx).permit(xxx, :file_staging) for Rails 4

3. That's it!

1. Fork it ( https://github.com/dabroz/paperclip-staging/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request