The 'default' model field option is used in Python rather than in the
database. SchemaEditor might set a column default to ease populating a
value on existing rows but that default shouldn't be left in the column's
definition. self.assertIsNone(field.default) means that the column doesn't
have a default.
On Thursday, October 20, 2016 at 8:29:29 AM UTC-4, Maximiliano Robaina
wrote:
>
> Hi Tim,
>
> Thanks for response.
>
> El martes, 18 de octubre de 2016, 12:07:34 (UTC-3), Tim Graham escribió:
>>
>> Hi Maxi,
>>
>> Did you take a look at the relevant commit that introduced the flag?
>>
>> https://github.com/django/django/commit/75303b01a9cc900eebf1f27ba0bc6508334242fc
>>
>
> Yes, I was looking into this changeset, but I can't understand yet what
> "And that the default is no longer set in the database." means in
> test_add_field_default_dropped [1].
> field.default contains the column default definition not the default value
> of the some table record, Is it that correct?, So, why this must be None?
>
>
>
> [1]
> https://github.com/django/django/commit/75303b01a9cc900eebf1f27ba0bc6508334242fc#diff-888b45a0a8f38ee67e8d22403cf994dbR1371
>
>
> Regards
>
>
>
>>
>> On Tuesday, October 18, 2016 at 9:51:46 AM UTC-4, Maximiliano Robaina
>> wrote:
>>>
>>> Hi,
>>>
>>> How supposed to can_introspect_default must work?
>>>
>>> I'm working on django firebird backend and I'm trying to figured out how
>>> this feature works, but the schema tests fails.
>>> This default is at database level or django level?
>>>
>>> If I define a field with a default value, and do a metadata
>>> introspection over this field to know if default value is defined, it
>>> always returns True.
>>>
>>> I hope be clear (sorry for my bad english)
>>>
>>> ---
>>> Maxi
>>>
>>
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