SimpleForm fancy uploads

A set of simple_form (~> 4.1) custom inputs to get image previews or a link to uploaded file.

This gem uses the simple_form ability to write your own form tags (check the simple_form-bootstrap example). In 90% of cases, you need some kind of preview when it comes to uploaded files (avatar, images, docs, etc..), why should I write the same markup each time?

What you get

There're only two new file inputs:

ImagePreview: guess what? when you edit an entry that contains an uploaded image, it will be shown (how many times did you this in a CMS?)
AttachmentPreview: this is a generic upload field, it will show a direct link to the file, so you can check what was uploaded.

How it works

Install

Simply add gem 'simple_form_fancy_uploads' to your Gemfile and run bundle install

Usage

Here's a basic example, as you can see, it's just a matter of specify the input as :image_preview or :attachment_preview. If using :image_preview, you can also specify a :preview_version => :some_version_name inside the :input_html Hash. This will let you to show a custom version generated with Carrierwave. Nice, isn't it?

If you need to fallback on Carrierwave's #default_url method to show a default image defined in your upload class, set :use_default_url => true in the options hash.

<%= simple_form_for @some_model do |f| %>
  <!-- we specify that this is an image form upload input, and we want to show the 'thumb' version
  of the carrierwave upload to not break our layout with a non-resized image -->
  <%= f.input :some_image_field, as: :image_preview, input_html: {preview_version: :thumb} %>

  <!-- here's a *normal* attachment. with this input, a link to the filename will be shown
  if there's an uploaded file -->
  <%= f.input :some_attachment_field, as: :attachment_preview %>
<% end %>

If you want, you can pass the preview_url to the image on the input_html options. This might be useful when you don't have a model binded to the form.

<%= simple_form_for :user do |f| %>
  <%= f.input :image, as: :image_preview, input_html: { preview_url: image_url } %>
<% end %>

Dependencies

To get it work, you need:

simple_form ~> 4.1 (repetita iuvant)
carrierwave actually it's the most opinionated gem for uploads (thank you paperclip for the good times, but you know... life goes on)
ruby 2.2.2+

Testing

clone this repo
run bundle install
run rspec spec

Contributions & Bugs

the easy way: go to issues page and blame me.
the hard way: repeat the above points, then show your power and send a pull request.