2021-06-09 11:39:44 -04:00
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# Signals
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In addition to [Django's built-in signals](https://docs.djangoproject.com/en/stable/topics/signals/), NetBox defines some of its own, listed below.
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## post_clean
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This signal is sent by models which inherit from `CustomValidationMixin` at the end of their `clean()` method.
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### Receivers
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* `extras.signals.run_custom_validators()`
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2023-11-30 19:36:41 -05:00
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## core.job_start
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This signal is sent whenever a [background job](../features/background-jobs.md) is started.
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### Receivers
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* `extras.signals.process_job_start_event_rules()`
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## core.job_end
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This signal is sent whenever a [background job](../features/background-jobs.md) is terminated.
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### Receivers
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* `extras.signals.process_job_end_event_rules()`
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## core.pre_sync
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This signal is sent when the [DataSource](../models/core/datasource.md) model's `sync()` method is called.
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## core.post_sync
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This signal is sent when a [DataSource](../models/core/datasource.md) finishes synchronizing.
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