Django脚本无法保存模型实例，抱怨值为null的字段...？

我正在做最简单的操作，并得到一个错误...我拉模型实例，更新一些字段，然后保存我修改的那些字段。我收到一个错误，指出这些字段中的一个不允许空值。该布尔型字段在models.py中具有默认值，在数据库中为AND，它是我为其保存值的字段之一。Django脚本无法保存模型实例，抱怨值为null的字段...？

models.py

class Person(TimeStampedModel): 
    # ... 
    precertified = models.BooleanField(default=False)

logic.py

try: 
    print('Getting Person %s...' % record['nurturing_id']) 
    person = Person.objects.get(pk=record['nurturing_id']) 
except Person.DoesNotExist: 
    person = None 
    print('Person %s no longer exists.' % record['nurturing_id']) 
if person: 
    person.uncorrected_address = person.address 
    person.uncorrected_address_line_two = person.address_line_two 
    person.uncorrected_city = person.city 
    person.uncorrected_state = person.state 
    person.uncorrected_zipcode = person.zipcode 
    person.address = record['Address'] 
    person.address_line_two = record['Address Line Two'] 
    person.city = record['City'] 
    person.state = record['State'] 
    person.zipcode = record['Zipcode'] 
    person.precertified = True 
    person.precertified_check = now 
    person.save(update_fields=['precertified', 'address', 'address_line_two', 'city', 'state', 'zipcode', 'uncorrected_address', 'uncorrected_address_line_two', 'uncorrected_city', 'uncorrected_state', 'uncorrected_zipcode', ])

使用person.save()也会失败。

回溯：

Traceback (most recent call last): 
    File "<console>", line 1, in <module> 
    File "/sites/easy/apps/JSM/logic.py", line 1349, in precertify_contacts 
    person.save(update_fields=['precertified', 'address', 'address_line_two', 'city', 'state', 'zipcode', 'uncorrected_address', 'uncorrected_address_line_two', 'uncorrected_city', 'uncorrected_state', 'uncorrected_zipcode', ]) 
    File "/Environments/easy/local/lib/python2.7/site-packages/model_utils/tracker.py", line 134, in save 
    ret = original_save(**kwargs) 
    File "/Environments/easy/src/easyapps/nurturing/models.py", line 248, in save 
    super(Person, self).save(*args, **kwargs) 
    File "/Environments/easy/local/lib/python2.7/site-packages/django/db/models/base.py", line 708, in save 
    force_update=force_update, update_fields=update_fields) 
    File "/Environments/easy/local/lib/python2.7/site-packages/django/db/models/base.py", line 736, in save_base 
    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields) 
    File "/Environments/easy/local/lib/python2.7/site-packages/django/db/models/base.py", line 801, in _save_table 
    forced_update) 
    File "/Environments/easy/local/lib/python2.7/site-packages/django/db/models/base.py", line 851, in _do_update 
    return filtered._update(values) > 0 
    File "/Environments/easy/local/lib/python2.7/site-packages/django/db/models/query.py", line 645, in _update 
    return query.get_compiler(self.db).execute_sql(CURSOR) 
    File "/Environments/easy/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 1149, in execute_sql 
    cursor = super(SQLUpdateCompiler, self).execute_sql(result_type) 
    File "/Environments/easy/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 848, in execute_sql 
    cursor.execute(sql, params) 
    File "/Environments/easy/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 79, in execute 
    return super(CursorDebugWrapper, self).execute(sql, params) 
    File "/Environments/easy/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute 
    return self.cursor.execute(sql, params) 
    File "/Environments/easy/local/lib/python2.7/site-packages/django/db/utils.py", line 95, in __exit__ 
    six.reraise(dj_exc_type, dj_exc_value, traceback) 
    File "/Environments/easy/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 64, in execute 
    return self.cursor.execute(sql, params) 

IntegrityError: null value in column "precertified" violates not-null constraint 
DETAIL: Failing row contains (165771, 2016-11-16 01:48:15.613901+00, 2017-02-10 14:09:34.11354+00, General Manager, Prospect, null, , [email protected], 1671 SOME RD, None, LINTHICUM, MD, 21090-9999, null, null, null, null, null, null, 999999, null, null, null, null, , Company Name, null, null, null, null, null, null, , , null, null, null, f, null, null, null, 005o0000001fAnfAAE, , Market Specific Mass Email, null, null, 00Qo0000006RxoUEAS, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, null, f, null, null, 2017-02-10 14:09:34.061993+00, 1671 Some Rd, null, Linthicum, MD, 21090).

我必须失去了一些东西愚蠢。有人给我提出这个提示吗？

来源

2017-02-10 Psyferre

看起来真的很奇怪，您是否尝试在person.save（）之前打印（person.precertified）？还要检查models.py中是否存在此类的save（）方法;看看信号 - 例如pre-save – Satevg

@Satevg：是的！我不能相信我错过了这一点。我有一个基于模型以前版本的自定义保存方法，如果地址发生更改，则将优先级设置为无。 *拍额头*谢谢！ – Psyferre

添加评论为答复:) – Satevg

看起来真的很奇怪，你有没有尝试print(person.precertified)person.save()过吗？

同时检查models.py中是否有save()这个类的方法;看看信号 - 例如pre-save

来源

2017-02-13 10:42:19 Satevg

就像@Satevg建议的那样，我有一个基于以前版本模型的自定义保存方法。如果任何地址字段被更改（它在先前版本中不是布尔值），则将其设置为无。

（@Satevg - 如果你想重新张贴作为一个答案，我会接受你的意见，所以你获得一些积分。）

来源

2017-02-10 16:07:04 Psyferre

Django脚本无法保存模型实例，抱怨值为null的字段...？

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