calling multiple rjs files

[macsig]

Hello, I have just added AJAX to show a notice in my view and it works fine showing a static message but I need to show a message according to the number of element I have in my DB. For instance if the table is empty the message shall be "message1", however if there is at least 1 element the message shall be "message2" and this works fine. But I would like to have different styles for each message so I though to call a different rjs for each condition but I don't know how.

How can I specify the name of rjs file to call?

What do I have to use instead "format.js" ?

THANKS

[Fenrir2]

You can specify the rjs to call in a parameter for the link/form helpers. You can also use ifs in rjs:

# rjs file
if something
  show message 1
else
  show message 2
end

[macsig]

Thanks
could you please provide to me a sample of

specify the rjs to call in a parameter for the link/form helpers

.

I guess I'm going to use the if within the rjs file but, you know, just to improve my rails skills.

Thanks again and have a nice day!

[Fenrir2]

You can easily find it yourself on http://railsmanual.com/

[macsig]

Thanks I guess I got it


link_to_remote "Delete this post",
url => { :action => "destroy", :id => post.id },
:update => { :success => "posts", :failure => "error" }

[Fenrir2]

[macsig]

actually I did in a different way

 if count == 0
       @category = Category.find(params[:id])
       @category.destroy
 
       flash[:notice] = lc(:destroyed)
       respond_to do |format|
         format.html { redirect_to categories_path }
         format.js   # Execute destroy.rjs
       end
     else
        flash[:notice] = lc(:not_destroyed)
        respond_to do |format|
          format.html { redirect_to categories_path }
          format.js { render :action => 'no_destroy.rjs' }
        end
      end

[Fenrir2]

Alternatively you could override destroy() to check if the category is empty and if it isn't it throws an exception.

You can then code the controller like this:

def the_action
  Category.find(params[:id]).destroy
  flash[:notice] = lc(:destroyed)
  respond_to do |format|
    format.html { redirect_to categories_path }
    format.js   # Execute destroy.rjs
  end
rescue
  flash[:notice] = lc(:not_destroyed)
  respond_to do |format|
    format.html { redirect_to categories_path }
    format.js { render :action => 'no_destroy.rjs' }
  end
end

[macsig]

Thanks, could you please explain to me the vantages to use this approach instead mine.

Moreover, which is the right way to call rjs file in Rails 2: if I call destroy.rjs it works fine, however if I call it destroy.js.rjs it doesn't but I would like to have the names with .extension.template.

Have a nice day!

[Fenrir2]

It feels cleaner to me. If you're going to use it then it's better to use a different method name for destroying + exception if not empty.

I just use .rjs, because rjs is always js. You should be able to use .js.rjs though.

[macsig]

it's better to use a different method name for destroying + exception if not empty.

Thanks, I see your point so, if I understand well you suggest to check out in destroy if it is empty and after calling "the_action" but how can I do that? I mean I can I hook the exception?

Thanks and have a nice day!

[Fenrir2]

Yes you can "rescue" the exception like all other exceptions in Ruby. In fact that is what I did in the code I posted. You raise the exception in checked_destroy() in your model, and you rescue it in the controller action.

[macsig]

Thanks,
I'm sorry but that you call "checked_destroy" (that it is the same action you called earlier "the_action") should be in the controller or in the model?

Could you please provide to me a sample. I really appreciate it.

Thanks again

[Fenrir2]

In the model. Google "exceptions in ruby".