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Registering Callbacks

To register a callback for an event in Movable Type, you will need to make changes to your config.yaml. You will need to have on hand two things:

  • the name of the event you are listening for
  • the package name and subroutine name to be invoked when the event occurs

For example, to register a callback for the MT::Entry pre_save event, use the following config.yaml:

name: Example Plugin for Movable Type
id: Example
description: This plugin is an example plugin for Movable Type.
version: 1.0
callbacks:
    MT::Entry::pre_save: $Example::Example::Plugin::entry_pre_save

You will then need to add an event handler or callback function to your Plugin.pm file.

Tip: Registering Any-Class Object-level Callbacks

Developers can also register callbacks for all pre_save events by using a wildcard like so:

name: Example Plugin for Movable Type
id: Example
description: This plugin is an example plugin for Movable Type.
version: 1.0
callbacks:
    '*::pre_save': $Example::Example::Plugin::entry_pre_save

“Any-class” callbacks are called after all class-specific callbacks.

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1 Comment

carwellos

carwellos on May 22, 2009, 6:18 a.m. Reply

Helpful, but the ‘Event Handlers’ information that follows this can be quite confusing to users - it goes right into presavefilter - close, but different than pre_save.

For clarity these two should be consistent, or make it very clear that the handler is not for this event.

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