Support nested filters on event hooks definitions #251

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opened 2023-04-25 10:54:56 +02:00 by blacklight · 0 comments

blacklight commented

2023-04-25 10:54:56 +02:00

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Event hooks support key-value pairs for event attributes matching, and currently those pairs need to be strictly matching the associated key-value on the event for the hook to trigger.

We'd also like to support hook matching on more complex objects. For example, an entity object with several nested attributes:

from platypush.event.hook import hook
from platypush.message.event.entities import EntityUpdateEvent

@hook(EntityUpdateEvent, entity={
  'plugin': 'system',
  'external_id': 'system:cpu:percent',
})
def on_new_cpu_percent(event: EntityUpdateEvent):
  ...

The above hook would trigger for any EntityUpdateEvent that has an entity argument with the specified nested values for plugin and external_id, regardless of its other attributes.

Event hooks support key-value pairs for event attributes matching, and currently those pairs need to be strictly matching the associated key-value on the event for the hook to trigger. We'd also like to support hook matching on more complex objects. For example, an entity object with several nested attributes: ```python from platypush.event.hook import hook from platypush.message.event.entities import EntityUpdateEvent @hook(EntityUpdateEvent, entity={ 'plugin': 'system', 'external_id': 'system:cpu:percent', }) def on_new_cpu_percent(event: EntityUpdateEvent): ... ``` The above hook would trigger for any `EntityUpdateEvent` that has an `entity` argument with the specified nested values for `plugin` and `external_id`, regardless of its other attributes.