Preprocessors

FastPG applies lightweight preprocessors around create/save operations.

PreCreateProcessors

model_obj_populate_auto_now_add_fields(model_obj)

• Reads model_obj.Meta.auto_now_add_fields.
• For each listed field: if current value is None, sets datetime.now(fastpg.TZ).

model_dict_populate_auto_generated_fields(model_dict, model_cls)

• Reads model_cls.Meta.auto_generated_fields.
• Deletes those keys from insert payload before SQL execution.

PreSaveProcessors

model_obj_populate_auto_now_fields(model_obj)

• Reads model_obj.Meta.auto_now_fields.
• For each listed field: if current value is None, sets datetime.now(fastpg.TZ).

Where preprocessors are used

• AsyncQuerySet.create(...)
• AsyncQuerySet.bulk_create(...)
• DatabaseModel.save(...)

These helpers fail open when optional Meta lists are not defined.