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Avoid __class__ swap in pre-added field generation. #38

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Nov 5, 2023
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Avoid __class__ swap in pre-added field generation. #38

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13 changes: 11 additions & 2 deletions syzygy/autodetector.py
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Original file line number Diff line number Diff line change
Expand Up @@ -163,9 +163,18 @@ def add_operation(self, app_label, operation, dependencies=None, beginning=False
super().add_operation(app_label, operation, dependencies, beginning)

def _generate_added_field(self, app_label, model_name, field_name):
# Delegate most of the logic to super() ...
super()._generate_added_field(app_label, model_name, field_name)
add_field = self.generated_operations[app_label][-1]
add_field.__class__ = AddField
# ... and immediately swap the added operation by an adjsuted one.
old_add_field = self.generated_operations[app_label][-1]
add_field = AddField(
old_add_field.model_name,
old_add_field.name,
old_add_field.field,
old_add_field.preserve_default,
)
add_field._auto_deps = old_add_field._auto_deps
self.generated_operations[app_label][-1] = add_field
stage = OperationStage()
self.add_operation(
self.STAGE_SPLIT,
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