helper with block and raw

Question

Given an helper like this one

def helper_method(name, &block)
  result = block_given? ? capture(&block)
  ...
  result
end

And this HAML view

= raw helper_method do
  .content
    some html content

result is nil when used with raw. why?

I know how to solve this, there is many way to avoid the situation but what I want to know is why I'm loosing the block?

score 2 · Answer 1 · answered Jul 11 '11 at 18:30

2

Since you are not using () the block is not reaching the helper_method.

Basically the rawmethod is the one getting the block.

try : raw helper_method {}

It's one of the main differences between the do end and the {} blocks.

Or use the () to prevent the ambiguity.

answered Jul 11 '11 at 18:30

Roberto Decurnex

Actually, no, I am using to pass some options (). I didn't specify to make it short, but I'll investigate in that way. Thanks for you input – Charles Barbier Jul 11 '11 at 18:34
I mean something like this: `raw( helper_method do ... end )`. You are having problems with the precedence. – Roberto Decurnex Jul 11 '11 at 18:38
I see what you mean, but in the context of Haml, I don't see how I can do this – Charles Barbier Jul 11 '11 at 18:40
@unixcharles In order to make it work and sort of clean I can only think about creating a `Proc` and send it as the `helper_method` param with `&` or create a `raw_helper_method` just to get the block and add the `raw` to the `helper_method` return value. HAML won't give you a clear solution here. – Roberto Decurnex Jul 11 '11 at 19:08

score 0 · Answer 2 · answered Jul 11 '11 at 18:29

0

I'm not sure because i never user haml but don't you need a end tag??

like this:

<%= raw helper_method do %> 

<% end %>

?

answered Jul 11 '11 at 18:29

Nicos Karalis

No, you don't need end tag in HAML – Victor Moroz Jul 11 '11 at 18:35
No, its one of the point of Haml, indentation close the block, like in python. – Charles Barbier Jul 11 '11 at 18:38

2 Answers2