Hi all,
today I am releasing ResourcefulViews 0.1, a Rails plugin that I have
been working on lately. ResoursefulViews started as a simple naming
convention for CSS classes that we began using at twinity.com a while
ago, and that was aimed at taking RESTful conventions far beyond
controllers. It eventually became a plugin.
Please check it out, and please let me know what you think!
http://svn.ingoweiss.com/plugins/resourceful_views/tags/REL_0_1
Ingo Weiss
From the README:
= ResourcefulViews 0.1
ResourcefulViews aims to take RESTful conventions beyond controllers
and into views by extending the ''map.resources'' method to
install a
comprehensive vocabulary of resource-oriented view helpers
== Why?
Rails, being it''s opinionated self, establishes strong RESTful
conventions for routes and controllers. In comparison, Rails appears
to have few opinions about how views should be written, let alone CSS
sheets or JavaScripts. I think this is some wasted RESTful momentum
worth recouping, and ResourcefulViews is here to recoup it.
The vision is that once an application''s resources are defined,
developers and designers will have a rich, shared vocabulary of view
helpers and CSS classes readily available, greatly reducing the need
to come up with their own, potentially conflicting vocabularies, and
freeing them to focus on higher level problems instead.
== How?
For every resource defined in routes.rb via ''resources'' or
''resource'',
ResourcefulViews defines seven helper methods (plus some extra ones).
For each of the seven ''CRUD'' actions one helper is installed
which:
* is named ''[CRUD action]_[route name prefix][resource name]'':
''create_table'', ''destroy_table_leg'',
''new_table_top'', etc.
* renders either a link (index new show edit) or a form (create update
delete), that, when clicked/submitted, will trigger an HTTP request
which gets routed to the helper''s CRUD action on the
resource''s
controller
* equips the link/form with a set of standard class attributes
composed of the resource name, the CRUD action name, plus the two
joined with ''_'' to help IE (''create table
create_table'')
== Basic example:
Say you have an app for furnishing your dream aparmtment, with a
''tables'' resource. With ResourcefulViews installed,
<code>map.resources :tables</code> will not only install the
standard
named route helpers, but also the following ones:
index_tables, new_table, create_table, show_table, edit_table,
update_table, destroy_table
Now let''s look at a vertical slice through an application, with the
deletion of a ''table'' resource as an example:
==== Routes
map.resources :tables
==== Controller
class TablesController < ActiveRecord::Base
def destroy
@table = Table.find(params[:table])
@table.destroy
redirect_to :action => ''index''
end
end
==== View
So far so familar. However, here is where Rails drops the RESTful
ball. With ResourcefulViews, however, you can write in your views:
<% destroy_table(@table) %>
# this will render:
<form action="/tables/1" method="post"
class="destroy table
destroy_table">
<input type="hidden" name="_method"
value="delete" />
<button type="submit">Delete</button>
</form>
Note the auto-generated class names, allowing you to use
''resourceful''
naming conventions beyond the view, for example in CSS sheets and
JavaScript scripts:
==== CSS
form.destroy_table button { background-image: url(/images/buttons/
remove.png) }
==== JavaScript
# LowPro behavior:
Event.addBehavior({
''form.destroy'': ConfirmDestroyResource()
});
==== Tests
# rspec story step
Then(/the page should have a(n?) ([a-z_]+) ([a-z_]+) (form|link)/)
do |_, crud_action, resource_name, tag|
response.should have_tag("#{tag}.#{crud_action}_#{resource_name}")
end
# rspec text story
Then the page should have a create comment form
Nice and consistent, isn''t it? And compact, too:
<% create_table(:type => ''DiningTable'') %>
# will render:
<form action="/tables" method="post" class="create
table
create_table">
<input type="text" name="table[type]"
value="DiningTable" />
<button type="submit">Add</button>
</form>
<% search_tables(:parameters => {:order => ''name''})
%>
# will render:
<form action="/tables" method="get" class="index
tables index_tables
search search_tables">
<input type="hidden" name="order"
value="name">
<input type="text" name="query" />
<button type="submit">Search</button>
</form>
This is just to give you a taste of what is possible. For more
examples please refer to the rdoc for the individual ''build_[CRUD
action name]_helper'' methods (<code>rake doc:plugins
PLUGIN=resourceful_views</code>)
== Common options
* <code>:label</code> specifies the content of the link tag in link
helpers, and of the button tag in form helpers. If
<code>:label</code>
is omitted, the helpers will use a default label
* <code>:parameters</code> allows for specifying additional
parameters
to send with the request, via url query parameters in link helpers,
and via hidden fields in form helpers
* For block-less create_resource and update_resource helpers, the
<code>:attributes</code> option is used to specify resource
attributes
to be sent with the request
* All other options(such as <code>:id</code> and
<code>:title</code>)
are applied to the form in form helpers and to the link in link
helpers
* To apply options to the button tag instead of the form tag in form
helpers, make the options hash the value of the <code>:button</code>
option (<code>:button => {:id =>
''logout_button''}</code>)
* both the <code>create_resource</code> and the
<code>update_resource</
code> helpers support passing in a ''template'' model as the
last
argument that is passed on to the ''fields_for'' helper
== How about nested resources?
Not a problem. In fact, here is where it gets interesting:
<% edit_table_top(@table) %>
# will render:
<a href="/tables/1/top/edit" class="edit top
edit_top">Edit</a>
== Helper name suffixes
If the helpers are crowding your namespace, or if you just don''t like
the short helper names, you can tell ResourcefulViews to use suffixes
for naming the helpers. Just put this in an initializer:
# This will append ''_link'' to all link helpers, like
''edit_table_top_link''
ResourcefulViews.link_helpers_suffix = ''_link''
# This will append ''_form'' to all link helpers, like
''search_tables_form''
ResourcefulViews.form_helpers_suffix = ''_form''
== Tests
ResourcefulViews comes with en extensive rspec test suite: <code>rake
spec:plugins PLUGIN=resourceful_views</code>
== Plans
ResourcefulViews 0.1 is an experimental release. If you decide to give
it a spin, please be aware that future versions might introduce
incompatible syntax changes.
The plugin is all about the power of conventions, and about maximizing
their benefits. Consequently, I have no plans to give it the
flexibiliy to handle every non-standard situation out there. There are
always the standard Rails form/link helpers to fall back to if more
flexibility is needed. However, here are a couple of features that I
could see being useful:
* There are situations, especially in lists, where the auto-generated
classnames seem very verbose, so it will likely be possible to turn
them on/off for individual helpers, or in lists only.
* It will likely be possible to configure defaults for options like
<code>:label</code> or <code>:title</code>
== Known problems
* ActiveMerchant seems to run ''routes.rb'' before
ResourcefulViews
loads, resulting in ResourcefulViews helpers not being defined. To fix
this, make sure ResourcefulViews loads before active_merchant by
putting this in your environment file: <code>config.plugins [
:resourceful_views, :all ]</code>
== License
Copyright (c) 2008 Ingo Weiss, released under the MIT license
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