Rails - Sep 2007 - automatic scoping in controller based on params

Hi guys,

let''s say I have a nested route, like User > Roles

# map.resources :user, :has_many => [ :roles ]

In this case, calling new_user_role_url gets me to the role  
controller''s :create method with a user_id set in the parameters. Is  
there a better way to handle the creation of this role object  
automatically in the User object''s :roles association or I just have  
to resort to the good old method of finding the appropriate user  
object first and add the new role object to it''s association proxy:

# @user = User.find(params[:id])
# @user.roles << Role.create(params[:role])

Any ideas would be appreciated.

Regards,
András

--
Tarsoly András
tarsolya-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org




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User.find(params[:user_id]).roles.create(params[:role])

or

Role.create( params[:role].merge(:user_id => params[:user_id]) )

I would prefer the first way.

Sometimes is better to be more verbose

if user = User.find_by_id(params[:user_id])
  user.create(params[:role])
end

what you might want to do is something like this especially if the
presence of the user is obbligatory:

before_filter :get_user
private
def get_user
  @user = params[:user_id] || current_user
  raise YourOwnCustomError unless @user
end
public

def create
  @user.roles.create(params[:role])
end

Diego

On 9/6/07, Tarsoly András
<tarsolya-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
> Hi guys,
>
> let''s say I have a nested route, like User > Roles
>
> # map.resources :user, :has_many => [ :roles ]
>
> In this case, calling new_user_role_url gets me to the role
controller''s
> :create method with a user_id set in the parameters. Is there a better way
> to handle the creation of this role object automatically in the User
> object''s :roles association or I just have to resort to the good
old method
> of finding the appropriate user object first and add the new role object to
> it''s association proxy:
>
> # @user = User.find(params[:id])
> # @user.roles << Role.create(params[:role])
>
> Any ideas would be appreciated.
>
> Regards,
> András
>
> --
> Tarsoly András
> tarsolya-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
>
>
>
>
>  >
>

-- 
Diego Scataglini

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