[wp-trac] [WordPress Trac] #36944: Display server-sent Customizer setting validation errors before save is attempted

[WordPress Trac]

#36944: Display server-sent Customizer setting validation errors before save is
attempted
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 Reporter:  westonruter               |       Owner:  westonruter
     Type:  defect (bug)              |      Status:  accepted
 Priority:  normal                    |   Milestone:  4.6
Component:  Customize                 |     Version:  trunk
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:
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Comment (by westonruter):

 In [attachment:36944.3.diff]:

 * Introduce `Setting#findControls` to split out logic from
 `wp.customize.findControlsForSettings`, allowing individual settings to
 override the logic for how associated controls are found.

 @NateWr this change should help you give some control (pun intended) over
 how controls are listed for a given setting with associated notifications.
 You can override a setting's `findControls` method to handle a case when a
 single setting is associated with multiple controls, or when a single
 control has multiple fields that map to a setting with an object value
 (e.g. nav menu items or widget). I added support for handling
 notifications for a setting associated with multiple controls in the
 Customize Posts plugin: https://github.com/xwp/wp-customize-posts/pull/180

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Ticket URL: <https://core.trac.wordpress.org/ticket/36944#comment:11>
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