Delete with related field query fails due to invalid SQL generation

Describe the bug Using a filter query to select rows for deletion fails if the filter query is a related field query (i.e. across a foreign key).

To Reproduce

class Device(Model):
    device_id = fields.IntField(pk=True)
    name = fields.CharField(max_length=16)

class LogMessage(Model):
    device = fields.ForeignKeyFIeld('models.Device', related_name='log_messages')
    date_created = fields.DatetimeField(auto_now_add=True)
    message = fields.CharField(max_length=1024)

# [...]

await LogMessage.filter(device__name="test").delete()

Expected behavior In the example above, all “LogMessage” rows referencing devices having the name “test” should be deleted.

Instead, an invalid SQL DELETE query is generated.

[davidpurser]

I actually haven’t had time to look into this any further, but it may require the ForeignKeyField to be nullable as well, and I should mention this happens with PostgreSQL specifically. In any case, a query like DELETE FROM LogMessage x LEFT JOIN Device y was generated, and as far as I can tell, it should be DELETE x FROM LogMessage x LEFT JOIN Device y or DELETE LogMessage FROM LogMessage LEFT JOIN Device (i.e., specify specifically which table is being deleted from). Hope that helps.

[lewoudar]

Hi guys, any news about the resolution of this issue?