南方没有认识到我的模特

时间:2012-08-08 16:59:26

标签: python django django-south

我有以下名为UnixTimestampField的类:

from django.db import models
from datetime import datetime
from time import strftime

class UnixTimestampField(models.DateTimeField):
    op_params=''
    def __init__(self, null=False, blank=False, op_params='', **kwargs):
        super(UnixTimestampField, self).__init__(**kwargs)
        self.blank, self.isnull = blank, null
        self.null = True

    def db_type(self, connection):
        typ=['TIMESTAMP']
        # See above!
        if self.isnull:
            typ += ['NULL']
        if self.op_params != '':
            typ += [self.op_params]
        return ' '.join(typ)

    def to_python(self, value):
        return datetime.from_timestamp(value)

    def get_db_prep_value(self, value, connection, prepared=False):
        if value==None:
            return None
        return strftime('%Y%m%d%H%M%S',value.timetuple())

    def to_python(self, value):
        return value

from south.modelsinspector import add_introspection_rules
add_introspection_rules([], ["^web\customfields\.unixtimestampfield\.UnixTimestampField"])

每次我运行以下命令:python manage.py schemamigration web --initial时,我都会得到:

! (this field has class web.customfields.unixtimestampfield.UnixTimestampField)

有什么我想念的吗?它似乎甚至不承认该领域存在?我正在阅读文档:

http://south.readthedocs.org/en/latest/customfields.html#extending-introspection

http://south.readthedocs.org/en/latest/tutorial/part4.html#keyword-arguments

[溶液]

错误很简单。

以下行: ^web\customfields\.unixtimestampfield\.UnixTimestampField不正确。

它改为: ^web\.customfields\.unixtimestampfield\.UnixTimestampField

1 个答案:

答案 0 :(得分:1)

这很简陋。但是您可以将模型中的UnixTimestampField更改为DateTimeField。执行:

python manage.py schemamigration web --initial

在您将DateTimeField更改为UnixTimestampField

之后

这必须有效....但这是一个肮脏的解决方案

虽然您的代码中可能存在错误,但请更改:

add_introspection_rules([], ["^web\customfields\.unixtimestampfield\.UnixTimestampField"])

为此:

add_introspection_rules([], ["^web\.customfields\.unixtimestampfield\.UnixTimestampField"])