Route alias, is it possible?
I have a Vehicle model:
Routes:
map.resource开发者_运维技巧s :vehicles, :has_many => :suppliers
Everything works great, but Vehicle has a boolean attribute is_truck. I want to make an Alias so I can get the same resources filtering only trucks, I tried with:
Routes:
map.trucks '/trucks', :controller => :vehicles, :action => :index, :is_truck => true
map.trucks '/trucks/by_supplier/:supplier', :controller => :vehicles, :action => :index, :is_truck => true
The first one works well, but when I search within a Form the second doesn't work and searches all suppliers.
Controller:
class VehiclesController
def index
if params[:supplier]
@vehicles = Vehicle.all :conditions => { :is_truck => params[:is_truck] }
else
@vehicles = Vehicle.all
end
end
...
end
Search Form:
<% form_for :truck, :url => {:controller => :trucks, :action => :index}, :html => {:method => :get} do |f| %>
<% f.text_field :search %>
<% f.submit 'Search Trucks' %>
<% end %>
Is it possible to map.resources as an alias ?
I found a cleaner way to do it, but Search is still broken under a specific supplier:
# Show all vehicles
map.connect '/vehicles/supplier/:supplier', :controller => :vehicles, :action => :index
map.resources :vehicles
# Only show trucks
map.connect '/trucks/supplier/:supplier', :controller => :vehicles, :action => :index, :is_truck => true
map.resources :vehicles, :as => 'trucks', :requirements => { :is_truck => true }
Resource: http://api.rubyonrails.org/classes/ActionController/Resources.html
Just amend your routes in the following way:
map.resources :vehicles, :has_many => :suppliers,
:collection => { :trucks => :get }
And check rake routes
for the routes this generates. It will allow you to list vehicles which are trucks:
trucks_vehicles GET /vehicles/trucks(.:format)
{:controller=>"vehicles", :action=>"trucks"}
So you now just need to add a new action called "trucks" which works similar to "index". Forms should keep track on it's own (via form fields) if you create a truck or another vehicle. Don't try to trick around with rails routing, which usually would mean your app design is flawed which will get you into trouble later.
You may take a look at STI (single table inheritance: one table stores multiple classes of vehicles). Another way would be to create a trucks controller which inherits from the vehicles controllers and overwrites just some methods like so:
class TrucksController < VehiclesController
def new
@is_truck = true
super
end
...
end
or
class TrucksController < VehiclesController
before_filter :this_is_a_truck
...
private
def this_is_a_truck
@is_truck = true
super
end
end
Update: Here's another one (given you have a is_truck column):
class TrucksController < VehiclesController
around_filter :with_truck_scope
...
private
# Scope every active record access with an is_truck condition
# you may want to put this directly into the model to get rid of the .send
# method and directly access "Vehicle.with_truck_scope &block" here
def with_truck_scope(&block)
Vehicle.send :with_scope, :find => { :conditions => "is_truck = 1" },
:create => { :is_truck => 1 }, &block
end
end
But I recommend really first to try out going with the :collection
and :member
parameters of Rails' routing.
are you processing it in your controller?
smth like:
class VehiclesController
def index
if params[:supplier]
@vehicles = Vehicle.all :conditions => { :supplier_id => params[:supplier] }
else
@vehicles = Vehicle.all
end
end
end
Not sure if it's possible to make an alias but at least you can try to swap your routes:
map.trucks '/trucks/by_supplier/:supplier', :controller => :vehicles, :action => :index, :is_truck => true
map.trucks '/trucks', :controller => :vehicles, :action => :index, :is_truck => true
Since routes works like 'first added - has higher priority' your solution could fail since map.trucks '/trucks' catch '/trucks/by_supplier/:supplier' as well. Also I'd recommed to refactor it a bit:
map.with_options :controller => :vehicles, :action => :index, :is_truck => true do |v|
v.trucks '/trucks/by_supplier/:supplier'
v.trucks '/trucks'
end
I recommend you to use another resource, just adding:
map.resources :vehicles, :as => :trucks, :has_many => :suppliers
Then handle it in your controller with something like:
def index
conds = {}
conds = { ... } if request.uri =~ /trucks/ # you can be more specific about the regexp if you need to
@vehicles = Vehicle.all :conditions => conds
end
What do you think about it?
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