doc/book/_maybe_to_integrate/template.rst
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 20 Jul 2011 14:10:03 +0200
changeset 7672 f31f9882c90f
parent 1714 a721966779be
child 12792 e2cdb1be6bd9
permissions -rw-r--r--
[rql2sql] closes #1832859: fake HAVING terms w/ EXISTS terms there are cases where we want to use the HAVING trick on terms that should belong to an EXISTS subquery. Currently , this causes bad sql. We should fix that until we've a proper rql grammar avoiding the need for this trick. Notice at some point, we may want **actuall** HAVING clauses and GROUPBY used in EXISTS subquery, but that's another story.
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Templates
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---------
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*Templates* are specific views that do not depend on a result set. The basic
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class `Template` (`cubicweb.common.view`) is derived from the class `View`.
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To build a HTML page, a *main template* is used. In general, the template of
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identifier `main` is the one to use (it is not used in case an error is raised or for
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the login form for example). This template uses other templates in addition
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to the views which depends on the content to generate the HTML page to return.
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A *template* is responsible for:
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1. executing RQL query of data to render if necessary
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2. identifying the view to use to render data if it is not specified
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3. composing the HTML page to return
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You will find out more about templates in :ref:`templates`.