考虑一下这个片段:
if fire_prim is not None:
print('Fire Primary is definitely not Null, here is proof: {}'.format(fire_prim))
fire_primary_obj = LifeSafety.objects.create(
name='Fire Primary',
store=store_obj,
phone_line=fire_prim,
phone_line_provider=an_provider)
我们得到以下输出:
Fire Primary is definitely not Null, here is proof: +16077244546
Traceback (most recent call last):
File "C:\Python\lib\site-packages\django\db\backends\utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "C:\Python\lib\site-packages\django\db\backends\sqlite3\base.py", line 298, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.IntegrityError: NOT NULL constraint failed: stores_lifesafety.phone_line
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "C:\Users\admin-dksc104694\Desktop\Dev\it-database\scripts\data.py", line 246, in update_lifesafety_devices
fire_primary_obj = LifeSafety.objects.create(name='Fire Primary', store=store_obj, phone_line=fire_prim, phone_line_provider=an_provider)
File "C:\Python\lib\site-packages\django\db\models\manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Python\lib\site-packages\django\db\models\query.py", line 413, in create
obj.save(force_insert=True, using=self.db)
File "C:\Python\lib\site-packages\django\db\models\base.py", line 718, in save
force_update=force_update, update_fields=update_fields)
File "C:\Python\lib\site-packages\django\db\models\base.py", line 748, in save_base
updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "C:\Python\lib\site-packages\django\db\models\base.py", line 831, in _save_table
result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "C:\Python\lib\site-packages\django\db\models\base.py", line 869, in _do_insert
using=using, raw=raw)
File "C:\Python\lib\site-packages\django\db\models\manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Python\lib\site-packages\django\db\models\query.py", line 1136, in _insert
return query.get_compiler(using=using).execute_sql(return_id)
File "C:\Python\lib\site-packages\django\db\models\sql\compiler.py", line 1289, in execute_sql
cursor.execute(sql, params)
File "C:\Python\lib\site-packages\django\db\backends\utils.py", line 100, in execute
return super().execute(sql, params)
File "C:\Python\lib\site-packages\django\db\backends\utils.py", line 68, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "C:\Python\lib\site-packages\django\db\backends\utils.py", line 77, in _execute_with_wrappers
return executor(sql, params, many, context)
File "C:\Python\lib\site-packages\django\db\backends\utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "C:\Python\lib\site-packages\django\db\utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Python\lib\site-packages\django\db\backends\utils.py", line 85, in _execute
return self.cursor.execute(sql, params)
File "C:\Python\lib\site-packages\django\db\backends\sqlite3\base.py", line 298, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.IntegrityError: NOT NULL constraint failed: stores_lifesafety.phone_line
我们可以100%确定地看到,在对象创建之前的行fire_prim
有一个值+16077244546
,这个值应该作为phone_line
,但是当它开始创建时,它会以某种方式被删除。你知道吗
这是我的型号供参考:
class LifeSafety(models.Model):
name = models.CharField(max_length=40, default='unspecified')
store = models.ForeignKey(Store, null=True, on_delete=models.SET_NULL)
phone_line = PhoneNumberField()
phone_line_provider = models.ForeignKey(Provider, null=True, on_delete=models.SET_NULL)
last_verification = models.DateTimeField(auto_now=True)
def __str__(self):
return self.name
提问前:
phone_line
是空的。你知道吗fire_prim
和尝试创建之间没有任何区别。你知道吗发布问题:
phone_line
改为字符域而不是电话号码域&电话号码过得很好。我也在为他们的Github Repo开一期。你知道吗phone_line
。你知道吗再次验证,这可以从壳牌公司没有问题。你知道吗
输入:LifeSafety.objects.create创建(name='Fire Primary',store=store,phone\u line='+16077244546')
输出:生命安全:主火灾(指示查询集)
有趣的是,当我在创建时显式地使用字符串时,对象确实是用该字符串填充的phone_line
创建的,但是我仍然得到了错误。你知道吗
输入:
print('Fire Primary is definitely not Null, here is proof: {}'.format(fire_prim))
fire_primary_obj = LifeSafety.objects.create(
name = 'Fire Primary',
store = store_obj,
phone_line = '+16077244546',
phone_line_provider = an_provider
)
输出与上述堆栈跟踪相同(仅在diff checker中存在名称差异)。你知道吗
我可以进入admin并查看它是否已创建,但仍然得到NOT NULL constraint
异常。你知道吗
目前没有回答
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