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y.2008 at wcm-solutions Sep 14, 2008, 3:26 AM Views: 1020 Permalink [dev] add view traversal Hi! This mail has been lying around for a while because I'm not sure it's the right way to start the discussion. But now I'll give it a try. Maybe the sprinters find some time to discuss this: One result of the "Add forms and menus"[1] thread was that we'd like to get add views by portal type name. Some custom traversal should look up and return the right view for the specified portal type. I'm currently trying to figure out how to implement that correctly and am struggling with some details: 1.) What should URLs look like? ------------------------------- Here are same possible URLs for adding a Message to a guest book: http://www.example.org/guestbook/+Message http://www.example.org/guestbook/@@+Message http://www.example.org/guestbook/addMessage.html http://www.example.org/guestbook/+/Message http://www.example.org/guestbook/@@+/Message http://www.example.org/guestbook/+/addMessage.html http://www.example.org/guestbook/+cmf/Message http://www.example.org/guestbook/@@+cmf/Message http://www.example.org/guestbook/+cmf/addMessage.html http://www.example.org/guestbook/add/Message http://www.example.org/guestbook/@@add/Message http://www.example.org/guestbook/add/addMessage.html 2.) Which hook should be used for custom traversal? --------------------------------------------------- a) for URLs like http://www.example.org/guestbook/+Message In this case we use a special prefix '+' followed by the portal type name. CMF containers don't implement IPublishTraverse, so we can register an IPublishTraverse adapter. If we don't find an add view, we can fall back to DefaultPublishTraverse behavior. Unfortunately the IPublishTraverse hook only works with one adapter. If other packages like plone.app.imaging[2] try to use the same hook, we get a problem. b) for URLs like http://www.example.org/guestbook/+/Message The '+' view already implements IPublishTraverse, so we can't change traversal using an adapter. The only solution I can see is to replace the '+' view by a customized version. c) for URLs like http://www.example.org/guestbook/add/Message If we use our own adding view, we can implement IPublishTraverse inside the view or as adapter. 3.) For which context should we register the add views? ------------------------------------------------------- The add views will depend on special portal type handling done by the traverser. So we register the add views for traverser? Or should all views have a default portal type that is used if we access add views directly? In that case we would register the add view for the container. plone.dexterity[3] uses an @@add-dexterity-content traverser, but I don't think product names like dexterity or cmf should be visible in URLs. Those are implementation details that should be transparent for users. Any feedback is welcome. Cheers, Yuppie [1] http://mail.zope.org/pipermail/zope-cmf/2008-July/027500.html [2] http://dev.plone.org/plone/browser/plone.app.imaging/trunk/plone/app/imaging/traverse.py [3] http://dev.plone.org/plone/browser/plone.dexterity/trunk/plone/dexterity/browser/add.py _______________________________________________ Zope-CMF maillist - Zope-CMF[at]lists.zope.org http://mail.zope.org/mailman/listinfo/zope-cmf See https://bugs.launchpad.net/zope-cmf/ for bug reports and feature requests

Subject User Time [dev] add view traversal y.2008 at wcm-solutions Sep 14, 2008, 3:26 AM     Re: [dev] add view traversal jens at dataflake Sep 14, 2008, 3:50 AM         Re: [dev] add view traversal optilude at gmx Sep 14, 2008, 4:30 AM             Re: [dev] add view traversal charlie at begeistert Sep 14, 2008, 4:44 AM             Re: [dev] add view traversal y.2008 at wcm-solutions Sep 15, 2008, 4:00 AM     Re: [dev] add view traversal charlie at begeistert Sep 14, 2008, 4:38 AM     Re: [dev] add view traversal optilude at gmx Sep 14, 2008, 4:47 AM         Re: [dev] add view traversal y.2008 at wcm-solutions Sep 15, 2008, 4:04 AM     Re: [dev] add view traversal optilude at gmx Sep 14, 2008, 4:53 AM     Re: [dev] add view traversal tseaver at palladion Sep 14, 2008, 5:50 AM         Re: [dev] add view traversal rnix at squarewave Sep 14, 2008, 6:11 AM     Re: [dev] add view traversal y.2008 at wcm-solutions Sep 15, 2008, 4:05 AM         Re: [dev] add view traversal optilude at gmx Sep 15, 2008, 6:31 AM             Re: [dev] add view traversal y.2008 at wcm-solutions Sep 15, 2008, 9:21 AM                 Re: [dev] add view traversal optilude at gmx Sep 15, 2008, 11:08 AM

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