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delete

django_spire.contrib.sync.django.storage.strategy.delete

DeleteStrategy

Bases: Protocol

delete

Source code in django_spire/contrib/sync/django/storage/strategy/delete.py 
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def delete(
    self,
    model: type[SyncableMixin],
    deletes: dict[str, int],
    origin_node: str,
) -> None: ...

HardDeleteStrategy

Source code in django_spire/contrib/sync/django/storage/strategy/delete.py 
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def __init__(self, identity_field: str = 'id') -> None:
    self._identity_field = identity_field

delete

Source code in django_spire/contrib/sync/django/storage/strategy/delete.py 
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def delete(
    self,
    model: type[SyncableMixin],
    deletes: dict[str, int],
    origin_node: str,
) -> None:
    if not deletes:
        return

    from django_spire.contrib.sync.django.sequence import (  # noqa: PLC0415
        SyncSequenceAllocator,
    )

    keys = sorted(deletes.keys())
    sequence_first = SyncSequenceAllocator().allocate(len(keys)).value_first
    model_label = model._meta.label

    with sync_bypass():
        for index, key in enumerate(keys):
            tombstone_timestamp = deletes[key]

            staleness_filter = {
                self._identity_field: key,
                'sync_field_last_modified__lte': tombstone_timestamp,
            }

            model.objects.filter(**staleness_filter).delete()

            _record_tombstone(
                model_label,
                key,
                tombstone_timestamp,
                sequence_first + index,
                origin_node,
            )

SoftDeleteStrategy

Source code in django_spire/contrib/sync/django/storage/strategy/delete.py 
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def __init__(self, identity_field: str = 'id') -> None:
    self._identity_field = identity_field

delete

Source code in django_spire/contrib/sync/django/storage/strategy/delete.py 
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def delete(
    self,
    model: type[SyncableMixin],
    deletes: dict[str, int],
    origin_node: str,
) -> None:
    if not deletes:
        return

    from django_spire.contrib.sync.django.sequence import (  # noqa: PLC0415
        SyncSequenceAllocator,
    )

    identity_lookup = {f'{self._identity_field}__in': list(deletes.keys())}
    instances = list(model.objects.filter(**identity_lookup))

    pending = self._collect_pending(instances, deletes)

    if not pending:
        return

    sequence_first = SyncSequenceAllocator().allocate(len(pending)).value_first
    model_label = model._meta.label

    with sync_bypass():
        for index, instance in enumerate(pending):
            key = str(getattr(instance, self._identity_field))
            tombstone_timestamp = deletes[key]
            local_sequence = sequence_first + index

            staleness_filter = {
                self._identity_field: key,
                'sync_field_last_modified__lte': tombstone_timestamp,
            }

            model.objects.filter(**staleness_filter).update(
                is_deleted=True,
                sync_field_last_modified=instance.sync_field_last_modified,
                sync_field_origin_node=origin_node,
                sync_field_sequence=local_sequence,
                sync_field_timestamps=instance.sync_field_timestamps,
            )

            _record_tombstone(
                model_label,
                key,
                tombstone_timestamp,
                local_sequence,
                origin_node,
            )