how to use open_tag?

[Tal]

I'm wanting to make helpers and I've come across open_tag in a few
places. I can't figure out where it's used though. Do i just have to
be sure to call it from within something being rendered by haml? or
can i get it to actually output text?

[Hampton]

Open tag, in a helper, will automatically append itself to the document.

So... you might have the line in your haml "- print_nav" (the - means "no output")

however, the method goes like this

def print_nav
  open_tag :div, :class => "nav" do
    open_tag "a", "Nav!"
  end
  return true
end

This will come out with

<div class='nav'>
  <a>Nav!</a>
</div>

The meaning of the "return true" is just to demostrate that the return value doesn't matter... since we are using -. As soon as open_tag or push_text or other haml-helper methods are called, the results are added to the response document.

Make sense?

-hampton.

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[Mislav Marohnić]

On Mon, Nov 23, 2009 at 14:29, Hampton <hca...@gmail.com> wrote:

Make sense?

No. How is it different than `haml_tag` 

[Hampton]

Oh god. Did I just totally have a brain-fail?

-hampton.

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[Mislav Marohnić]

On Fri, Nov 20, 2009 at 19:24, Tal <swimmi...@gmail.com> wrote:

I'm wanting to make helpers and I've come across open_tag in a few
places. I can't figure out where it's used though.

If you really meant `open_tag` and not `haml_tag`, I don't see how you could have seen it in places other than internal Haml code, because it's part of a private Haml::Buffer API. In fact, I can only find its definition but not where it's called from:

    def open_tag(name, self_closing, try_one_line, preserve_tag, escape_html, class_id,

                 nuke_outer_whitespace, nuke_inner_whitespace, obj_ref, content, *attributes_hashes)

      ...

    end

Nice attribute list :)

Anyway, regardless of whether this method is actually used internally or not, you should not use it. `haml_tag` is a pretty good option for view helpers and it's used like Hampton described in his reply.

[Nathan Weizenbaum]

open_tag is used internally; it's called from the compiled Ruby source, like most Haml::Buffer methods.

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