pre_change_values could be None if created, don't use it then
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1 changed files with 12 additions and 11 deletions
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@ -93,6 +93,7 @@ class DatabaseOverlayManager:
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if update_fields:
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field_values = {name: value for name, value in field_values.items() if name in update_fields}
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if pre_change_values is not None:
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field_values = {name: value for name, value in field_values.items() if value != pre_change_values[name]}
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# special diffing within the i18n fields
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