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comp.lang.ruby

how(where) to define a method that to be called by views?

hyena

12/6/2007 3:02:00 PM

Hi,

I just dabbed Ruby on rails abit and what to know where is the right place
to define a method, that prinf some output information to views, based on
some variable.

I define a function "def foo " in contrioller but the calling from a view
"test.rhtml" give errors. I google a while and did not find a quick answer
for this. Or shall I do this in helper class?

May some one shed some light on this?

Thanks.


3 Answers

Rick DeNatale

12/6/2007 3:16:00 PM

0

On 12/6/07, Sun <as@hut.at> wrote:
> Hi,
>
> I just dabbed Ruby on rails abit and what to know where is the right place
> to define a method, that prinf some output information to views, based on
> some variable.
>
> I define a function "def foo " in contrioller but the calling from a view
> "test.rhtml" give errors. I google a while and did not find a quick answer
> for this. Or shall I do this in helper class?
>
> May some one shed some light on this?

Yes that's what helpers are for.

Also, the rails-talk list is a better place to ask questions about rails.

--
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denh...

Reacher

12/6/2007 3:16:00 PM

0

On Dec 6, 9:02 am, "Sun" <a...@hut.at> wrote:
> Hi,
>
> I just dabbed Ruby on rails abit and what to know where is the right place
> to define a method, that prinf some output information to views, based on
> some variable.
>
> I define a function "def foo " in contrioller but the calling from a view
> "test.rhtml" give errors. I google a while and did not find a quick answer
> for this. Or shall I do this in helper class?
>
> May some one shed some light on this?
>
> Thanks.

You'll need to post some code. It's basically done like this:
[code]
app/controllers/my_controller.rb:
class MyController < ActiveController::Base
def index
@somevar = 'Hi!'
end
end

app/views/my_controller/index.rhtml:
<p><%= @somevar %></p>
[/code]
If you want to call a routine in your view, it's best to put it into
the appropriate helper class (that's what they are there for)
[code]
app/helpers/my_controller_helper.rb:
module MyControllerHelper
def somevar
'Hi!'
end
end
[/code]
now your controller/view looks like this
[code]
app/controllers/my_controller.rb:
class MyController < ActiveController::Base
def index
end
end

app/views/my_controller/index.rhtml:
<p><%= somevar %></p>
[/code]

hyena

12/6/2007 3:22:00 PM

0


"Reacher" <brandon.g.jones@gmail.com> wrote in message
news:f967ff7f-e2c6-43f0-8cc3-571af0151eb4@x69g2000hsx.googlegroups.com...
> On Dec 6, 9:02 am, "Sun" <a...@hut.at> wrote:
>> Hi,
>>
>> I just dabbed Ruby on rails abit and what to know where is the right
>> place
>> to define a method, that prinf some output information to views, based on
>> some variable.
>>
>> I define a function "def foo " in contrioller but the calling from a view
>> "test.rhtml" give errors. I google a while and did not find a quick
>> answer
>> for this. Or shall I do this in helper class?
>>
>> May some one shed some light on this?
>>
>> Thanks.
>
> You'll need to post some code. It's basically done like this:
> [code]
> app/controllers/my_controller.rb:
> class MyController < ActiveController::Base
> def index
> @somevar = 'Hi!'
> end
> end
>
> app/views/my_controller/index.rhtml:
> <p><%= @somevar %></p>
> [/code]
> If you want to call a routine in your view, it's best to put it into
> the appropriate helper class (that's what they are there for)
> [code]
> app/helpers/my_controller_helper.rb:
> module MyControllerHelper
> def somevar
> 'Hi!'
> end
> end
> [/code]
> now your controller/view looks like this
> [code]
> app/controllers/my_controller.rb:
> class MyController < ActiveController::Base
> def index
> end
> end
>
> app/views/my_controller/index.rhtml:
> <p><%= somevar %></p>
> [/code]

thanks you guys for your prompt answers!!!, you are of great help. I am in a
hurry to revise some rails code written by others and am a complete newbie
to either rails or ruby, just borrowed one book and try to understand the
ideas. .