doc/book/devweb/views/xmlrss.rst
author Denis Laxalde <denis.laxalde@logilab.fr>
Mon, 06 Mar 2017 14:19:20 +0100
changeset 12008 7694dcf5ad30
parent 10491 c67bcee93248
permissions -rw-r--r--
[etwist] Do not call repository's start_looping_tasks anymore and warn about this We are about to drop this method from Repository class and replace it by a blocking alternative. This is not compatible with how things currently work in a Twisted server implementation. So do not start repository "looping tasks" in Twisted server anymore and issue a warning about this. If someone is interested in restoring the "all-in-one" behavior where the repository runs within a Twisted server, they may start by implementing repository looping tasks using a Twisted mechanism such as, e.g., http://twistedmatrix.com/documents/current/core/howto/time.html and eventually provide the repository with a compatible scheduler instance so that is can register its periodic tasks. At the moment, we lack resources to do this (and maintain the Twisted server of CubicWeb in general). Related to #17057223.
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.. _XmlAndRss:
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XML and RSS views
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-----------------
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(:mod:`cubicweb.web.views.xmlrss`)
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Overview
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+++++++++
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*rss*
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    Creates a RSS/XML view and call the view `rssitem` for each entity of
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    the result set.
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*rssitem*
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    Create a RSS/XML view for each entity based on the results of the dublin core
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    methods of the entity (`dc_*`)
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RSS Channel Example
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++++++++++++++++++++
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Assuming you have several blog entries, click on the title of the
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search box in the left column. A larger search box should appear. Enter:
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.. sourcecode:: sql
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   Any X ORDERBY D WHERE X is BlogEntry, X creation_date D
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and you get a list of blog entries.
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Click on your login at the top right corner. Chose "user preferences",
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then "boxes", then "possible views box" and check "visible = yes"
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before validating your changes.
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Enter the same query in the search box and you will see the same list,
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plus a box titled "possible views" in the left column. Click on
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"entityview", then "RSS".
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You just applied the "RSS" view to the RQL selection you requested.
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That's it, you have a RSS channel for your blog.
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Try again with:
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.. sourcecode:: sql
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    Any X ORDERBY D WHERE X is BlogEntry, X creation_date D,
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    X entry_of B, B title "MyLife"
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Another RSS channel, but a bit more focused.
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A last one for the road:
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.. sourcecode:: sql
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    Any C ORDERBY D WHERE C is Comment, C creation_date D LIMIT 15
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displayed with the RSS view, that's a channel for the last fifteen
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comments posted.
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[WRITE ME]
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* show that the RSS view can be used to display an ordered selection
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  of blog entries, thus providing a RSS channel
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* show that a different selection (by category) means a different channel