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Skip operations for objects with no pictures to migrate #230

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Skip operations for objects with no pictures to migrate #230

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12 changes: 9 additions & 3 deletions pictures/migrations.py
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,9 @@ def update_pictures(self, from_field: PictureField, to_model: type[models.Model]
new_field_file.update_all(old_field_file)

def from_picture_field(self, from_model: type[models.Model]):
for obj in from_model._default_manager.all().iterator():
for obj in from_model._default_manager.exclude(
Q(**{self.name: ""}) | Q(**{self.name: None})
).iterator():
field_file = getattr(obj, self.name)
field_file.delete_all()

Expand All @@ -66,9 +68,13 @@ def to_picture_field(
from_field = from_model._meta.get_field(self.name)
if hasattr(from_field.attr_class, "delete_variations"):
# remove obsolete django-stdimage variations
for obj in from_model._default_manager.all().iterator():
for obj in from_model._default_manager.exclude(
Q(**{self.name: ""}) | Q(**{self.name: None})
).iterator():
field_file = getattr(obj, self.name)
field_file.delete_variations()
for obj in to_model._default_manager.all().iterator():
for obj in to_model._default_manager.exclude(
Q(**{self.name: ""}) | Q(**{self.name: None})
).iterator():
field_file = getattr(obj, self.name)
field_file.save_all()