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joshsusser committed Apr 24, 2011
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21 changes: 21 additions & 0 deletions LICENSE
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The MIT License

Copyright (c) 2011 by Josh Susser

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
65 changes: 65 additions & 0 deletions README.md
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# Informal

Informal is a small gem that enhances a Plain Old Ruby Object so it can be used
with Rails 3 form helpers in place of an ActiveRecord model. It works with the
Rails `form_for` helper, and `simple_form` as well.

Here's a quick (and slightly insane) example:

# models/command.rb
require "informal"
class Command
include Informal::Model
attr_accessor :command, :args
validates_presence_of :command
def run; `#{command} #{args}`; end
end

# views/commands/new.html.erb
<%= form_for @command do |form| %>
<%= form.text_field :command %>
<%= form.text_field :args %>
<%= form.submit "Do It!" %>
<% end %>

# controllers/commands_controller.rb
def create
command = Command.new(params[:command])
if command.valid?
command.run
end
end

## Installation

It's a Ruby gem, so just install it with `gem install informal`, add it to your
bundler Gemfile, or do whatever you like to do with gems. There is nothing to
configure.

## Usage

The insanity of the above example aside, Informal is pretty useful for creating
simple RESTful resources that don't map directly to ActiveRecord models. It
evolved from handling login credentials to creating model objects that were
stored in a serialized attribute of a parent resource.

In many ways using an informal model is just like using an AR model in
controllers and views. The biggest difference is that you don't `save` an
informal object, but you can add validations and check if it's `valid?`. If
there are any validation errors, the object will have all the usual error
decorations so that error messages will display properly in the form view.

### Initialization, #super and attributes

If you include `Informal::Model`, your class automatically gets an
`#initialize` method that takes a params hash and calls setters for all
attributes in the hash. If your model class inherits from a class that has its
own `#initialize` method that needs to get the super call, you should instead
include `Informal::ModelNoInit`, which does not create an `#initialize` method.
Make your own `#initialize` method, and in that you can assign the attributes
using the `#attributes=` method and also call super with whatever args are
needed.

## License

Released under the MIT License. See the LICENSE file.

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