ActiveScaffold :: Wiki
File Column Bridge

Overview

Do you upload files? Do you use active scaffold? If you answered yes to both of these questions, this solution is for you!

This small, easy plugin automatically gets you on the track to uploading files in Active Scaffold by tightly integrating in the file_column

Installation

To use, you’ll need the latest trunk version of Active Scaffold.

svn export http://activescaffold.googlecode.com/svn/trunk/ vendor/plugins/active_scaffold

Then, you’ll need file_column

script/plugin install http://filecolumn.googlecode.com/svn/tags/file_column

File Column Bridge is now in active scaffold core. Active Scaffold will automatically detect that File Column is installed, and will make use it.

Usage

Step 1

Create a model with a file column:

# app/models/entry.rb

# id           integer
# title        string(255)
# filename     string(255)

class Entry < ActiveRecord::Base
  file_column :filename
end

Step 2

Create your scaffold controller

# app/controllers/entries_controller.rb

class EntryController < ApplicationController
  active_scaffold :entries
end

and layout

# app/views/layouts/application.rhtml
<html>
<head>
  <title>active scaffold demo application</title>
  <%= javascript_include_tag :defaults %>
  <%= active_scaffold_includes %>
</head>
<body>
  <%= yield %>
</body>
</html>

Step 3

That’s it! Your form input will be automatically set to a file upload box, and in the list view (and show view) the “filename” will link to the uploaded file. Righteous! Also, File Column Bridge fixes the issue so if you edit a record, and don’t
upload a file, the previous file is kept. Gnarly!

(NOTE: file column usage instructions included in the README file in the plugin’s directory)

Troubleshooting

Problem: My web server won’t start anymore ever since I installed this plug-in.
- Solution: Make sure you have installed the latest TRUNK version of Active Scaffold.

Support

If you have issues installing the plugin, post to the Active Scaffold Forums .

If you are having troubles with file_column itself, go to the file_column website.

Author

Contact me:

  Tim C. Harper - irb(main):001:0> ( 'tim_see_harperATgmail._see_om'.gsub('_see_', 'c').gsub('AT', '@') )

Commentary

RaL (ravwar@gmail.com)

It is work for me only if I install Active Scaffold from http://activescaffold.googlecode.com/svn/trunk/
May be it’s help you too!

And thx a lot Tim for this wonderful plugin!

herval (http://hervalicio.us)

It doesn’t work for me if I have a configuration like that on my controller:

  active_scaffold do |config|
    config.actions = [:create,:list, :show, :update, :delete, :search, :nested]
    config.list.columns = [:name,:link, :logo]
    config.update.columns = [:name,:link, :logo]
    #config.update.multipart = true
    #config.create.multipart = true
    config.create.columns = [:name,:link, :logo]
  end

The error that pops up is this:

Update is not enabled. Please enable it or remove any references in your configuration (e.g. config.update.columns = [...]).

#{RAILS_ROOT}/vendor/plugins/active_scaffold/lib/config/core.rb:134:in `method_missing'
#{RAILS_ROOT}/vendor/plugins/active_scaffold_file_column_bridge/lib/active_scaffold_file_column_bridge.rb:19:in `initialize'
#{RAILS_ROOT}/vendor/plugins/active_scaffold/lib/active_scaffold.rb:47:in `new'
#{RAILS_ROOT}/vendor/plugins/active_scaffold/lib/active_scaffold.rb:47:in `active_scaffold'
#{RAILS_ROOT}/app/controllers/my_controller.rb:4

If I comment out the self.update.multipart call that provokes the error and activate it explicitly afterwards (see the two commented lines on my config above), it works like a charm.

Problem: My application encounters a Template Error when I want to use ‘show’ action to see the details of the new record created.

ActionView::TemplateError (`@#<Requirement:0xb68a5b7c>' is not allowed as an instance variable name) on line #8 of vendor/plugins/active_scaffold/frontends/default/views/_show_columns.rhtml:
5:     <dd><%= render :partial => 'show_columns' %></dd>
6:   <% else -%>
7:     <dt><%= column.label -%></dt>
8:     <dd><%= get_column_value(@record, column) -%> &nbsp;</dd>
9:   <% end -%>
10: <% end -%>
11: </dl>

Solution: You have an old version of file column installed. Remove all instances of the file column plugin from your project and use the one provided here.

Problem : The file upload dialog don’t seem working at all when I just installed file_column bridge.

Solution: Add the following two lines in controller

active_scaffold :entries do |conf| conf.create.link.page = true conf.update.link.page = true end

Problem : I’m keep gettig this error ,

Parameters: {“commit”=>“Create”, “action”=>“create”, “controller”=>“entries”, “entry”=>{“filename_temp”=>””, “filename”=>“C:\\Documents and Settings\\ks37877\\Desktop\\d11e.jpg”}}

NoMethod Error (You have a nil object when you didn’t expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.each): /vendor/plugins/active_scaffold/lib/attribute_params.rb:32:in `update_record_from_params’

what am I missing that required to fix this issue when I upload any image file?

Solution: you should override the form for your file column, put this partial on your app/views/etries/_filename_form_column.rhtml
```
 <dl>
   <dt>file</dt>
   <dd><%= file_column_field 'record', :filename %></dd>
 </dl>
```

It does works! thanks.

but in list the link is not activated? any help pls.

ActiveScaffold :: Wiki File Column Bridge