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TAL here hack in Plone
hack, metal, document_view, document_view.pt, index_html_content, index_html
28th of April 2005
Had to do a very useful and ugly but also smart hack in Plone today.
In the portal root I have a Document with Id index_html that the client is changing with the WYSIWYG editor. What I wanted to do was to change some METAL calls in the <head> tag of that one document. In fact, what I wanted to do was to cover up the left hand column which is done this way:
<metal:override fill-slot="column_one_slot" />
</head>
The problem was that the index_html Document is a Document so I can't edit it's TAL. I could have customized document_view.pt but that would have applied for all Document objects in the site. Here's how I solved it:
I renamed index_html to index_html_content and created a Page Template object in the portal root. The code for this one I got from portal_skins/plone_content/document_view.pt. Then I added the metal:override as shown above.
But I wanted this new index_html to render the content of the index_html_content object so that in, index_html I can (continue to) do stuff like here/getBody and here/Title. So what did I do? Here's a cut down copy of the index_html code:
lang="en"
metal:use-macro="here/main_template/macros/master"
i18n:domain="plone">
<head>
<metal:override fill-slot="column_one_slot" />
</head>
<body>
<metal:main fill-slot="main">
<!-- here's my hack! -->
<tal:hack define="here nocall:here/index_html_content">
<tal:main-macro metal:define-macro="main"
tal:define="len_text python:len(here.text);">
<h1 tal:content="here/title_or_id" class="documentFirstHeading">
Title or id
</h1>
[... stuff hidden ...]
</tal:main-macro>
</tal:hack>
</metal:main>
</body>
</html>
That didn't hurt, did it?
Update. A consequence is that the title can become "index_html" which isn't very nice.