Get key of IntegrityError in django bulk_create

Question

I am trying to do a Model.objects.bulk_create(bulk_objects) in django, I am expecting IntegrityError's at times but I would like get the objects details that has caused the exception.

try:
        # bulk_objects contains ~70k items
        Auction.objects.bulk_create(bulk_objects)
except IntegrityError as e:
        print(str(e.__cause__))
        msg = str(e.__cause__)
        match = re.search('(?!\()\d+(?=\))', msg)
        print(match.group(0)) # prints 123865 in this case

this throws the exception

insert or update on table "auction_table" violates foreign key constraint"my_constraint"
DETAIL:  Key (item_id)=(123865) is not present in table "item_table".

This is fine and I expect this, I am wanting to get the item_id that has caused the exception, in this case the item_id of 123865.

Is there a way of doing this without doing some regex on the string or iterating over the bulk_objects?

Was just hoping to get it directly from the error, otherwise I will continue with the regex approach

Answer 1

Exception raised when the relational integrity of the database is affected, eg a foreign key check fails, duplicate key, etc... So check if there are any duplicate entries, or any foreign key constraint of Database is failing.

    def bulk_create(self, objs, batch_size=None):
    """
    Inserts each of the instances into the database. This does *not* call
    save() on each of the instances, does not send any pre/post save
    signals, and does not set the primary key attribute if it is an
    autoincrement field (except if features.can_return_ids_from_bulk_insert=True).
    Multi-table models are not supported.
    """

According to docs bulk_create() will not support Multi-table models. So you have to create a batch explicitly then send that batch to bulk_create() . While creating that batch you can verify such things. You can check how to create a batch here .