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Wagtail 2.5 release notes - IN DEVELOPMENT
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What's new
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Other features
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 * Added support for customising EditHandler-based forms on a per-request basis (Bertrand Bordage)
 * Added more informative error message when ``|richtext`` filter is applied to a non-string value (mukesh5)
 * Automatic search indexing can now be disabled on a per-model basis via the ``search_auto_update`` attribute (Karl Hobley)
 * Improved diffing of StreamFields when comparing page revisions (Karl Hobley)
 * Highlight broken links to pages and missing documents in rich text (Brady Moe)
 * Preserve links when copy-pasting rich text content from Wagtail to other tools (Thibaud Colas)
 * Rich text to contentstate conversion now prioritises more specific rules, to accommodate ``<p>`` and ``<br>`` elements with attributes (Matt Westcott)
 * Added limit image upload size by number of pixels (Thomas Elliott)
 * Added ``manage.py wagtail_update_index`` alias to avoid clashes with ``update_index`` commands from other packages (Matt Westcott)
 * Renamed ``target_model`` argument on ``PageChooserBlock`` to ``page_type`` (Loic Teixeira)
 * ``edit_handler`` and ``panels`` can now be defined on a ``ModelAdmin`` definition (Thomas Kremmel)
 * Add Learn Wagtail to third-party tutorials in documentation (Matt Westcott)
 * Add a Django setting ``TAG_LIMIT`` to limit number of tags that can be added to any taggit model (Mani)
 * Added instructions on how to generate urls for ``ModelAdmin`` to documentation (LB (Ben Johnston), Andy Babic)


Bug fixes
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 * Set ``SERVER_PORT`` to 443 in ``Page.dummy_request()`` for HTTPS sites (Sergey Fedoseev)
 * Include port number in ``Host`` header of ``Page.dummy_request()`` (Sergey Fedoseev)
 * Validation error messages in ``InlinePanel`` no longer count towards ``max_num`` when disabling the 'add' button (Todd Dembrey, Thibaud Colas)
 * Rich text to contentstate conversion now ignores stray closing tags (frmdstryr)
 * Escape backslashes in ``postgres_search`` queries (Hammy Goonan)
 * Parent page link in page chooser search results no longer navigates away (Asanka Lihiniyagoda, Sævar Öfjörð Magnússon)
 * ``routablepageurl`` tag now correctly omits domain part when multiple sites exist at the same root (Gassan Gousseinov)
 * Added missing collection column specifier on document listing template (Sergey Fedoseev)
 * Page Copy will now also copy ParentalManyToMany field relations (LB (Ben Johnston))
 * Admin HTML header now includes correct language code (Matt Westcott)
 * Unclear error message when saving image after focal point edit (Hugo van den Berg)
 * Fix: Increase max length on ``Embed.thumbnail_url`` to 255 characters (Kevin Howbrook)
 * Fix: ``send_mail`` now correctly uses the ``html_message`` kwarg for HTML messages (Tiago Requeijo)


Upgrade considerations
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``EditHandler.bind_to_model`` and ``EditHandler.bind_to_instance`` deprecated
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The internal ``EditHandler`` methods ``bind_to_model`` and ``bind_to_instance`` have been deprecated, in favour of a new combined ``bind_to`` method which accepts ``model``, ``instance``, ``request`` and ``form`` as optional keyword arguments. Any user code which calls ``EditHandler.bind_to_model(model)`` should be updated to use ``EditHandler.bind_to(model=model)`` instead; any user code which calls ``EditHandler.bind_to_instance(instance, request, form)`` should be updated to use ``EditHandler.bind_to(instance=instance, request=request, form=form)``.