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resouce_this
===========
Not scaffolding. Resourcing. Creates extremely customizable resource controllers with one line of code.
class PostsController < ActionController::Base
resource_this
end
...will generate the following code:
class PostsController < ActionController::Base
before_filter :load_post, :only => [ :show, :edit, :update, :destroy ]
before_filter :load_posts, :only => [ :index ]
before_filter :new_post, :only => [ :new ]
before_filter :create_post, :only => [ :create ]
before_filter :update_post, :only => [ :update ]
before_filter :destroy_post, :only => [ :destroy ]
protected
def load_post
@post = Post.find(params[:id])
end
def new_post
@post = Post.new
end
def create_post
returning true do
@post = Post.new(params[:post])
@created = @post.save
end
end
def update_post
returning true do
@updated = @post.update_attributes(params[:post])
end
end
def destroy_post
@post = @post.destroy
end
def load_posts
@posts = Post.find(:all)
end
public
def index
respond_to do |format|
format.html
format.xml { render :xml => @posts }
format.js
end
end
def show
respond_to do |format|
format.html
format.xml { render :xml => @post }
format.js
end
end
def new
respond_to do |format|
format.html { render :action => :edit }
format.xml { render :xml => @post }
format.js
end
end
def create
respond_to do |format|
if @created
flash[:notice] = 'Post was successfully created.'
format.html { redirect_to @post }
format.xml { render :xml => @post, :status => :created, :location => @post }
format.js
else
format.html { render :action => :new }
format.xml { render :xml => @post.errors, :status => :unprocessable_entity }
format.js
end
end
end
def edit
respond_to do |format|
format.html
format.js
end
end
def update
respond_to do |format|
if @updated
flash[:notice] = 'Post was successfully updated.'
format.html { redirect_to @post }
format.xml { head :ok }
format.js
else
format.html { render :action => :edit }
format.xml { render :xml => @post.errors, :status => :unprocessable_entity }
format.js
end
end
end
def destroy
respond_to do |format|
format.html { redirect_to :action => posts_url }
format.xml { head :ok }
format.js
end
end
end
Nested Resources
===========
class CommentsController < ActionController::Base
resource_this :nested => [:posts]
end
This generates a very similar controller to the one above with adjusted redirects and one additional before_filter / loader method pair to grab the parent resource. In this case:
before_filter :load_post
def load_post
@post = Post.find(params[:post_id])
end
Sorting, etc
===========
class CommentsController < ActionController::Base
resource_this :finder_options => {:order => 'created_on'}
end
...or, for lazily evaluated sorting options:
class CommentsController < ActionController::Base
resource_this :finder_options => Proc.new { finder_options }
protected
def finder_options
order = case params[:sort]
when 'date_reverse' then 'created_on desc'
else 'created_on'
end
{:order => order, :limit => params[:limit] || 10 }
end
end
will_paginate
===========
will_paginate support is baked right in:
class CommentsController < ActionController::Base
resource_this :will_paginate => true
end
This works with the :finder_options option as well
Opinionated Software
===========
The separation of logic - DB operations in before_filters, rendering in the standard resource controller methods - makes this approach ridiculously easy to customize. Need to load an additional object for the :show action? Slap another before_filter on it. Need to change the path that the :update action redirects to? Override the :update action with your new rendering behavior.
Generator
===========
A resource_this generator is included - does the same thing as the 'resource' generator but adds 'resource_this' to the generated controller.
Questions? Comments? Flames? Patches?
===========
jnewland@gmail.com
Copyright
===========
Copyright (c) 2007 Jesse Newland, released under the MIT license
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