我正在尝试运行我编写的脚本，将一些数据从json文件移动到我的数据库中，并不断收到同样的错误。
回溯：
Traceback (most recent call last):
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/backends/utils.py", line 65, in execute
return self.cursor.execute(sql, params)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 328, in execute
return Database.Cursor.execute(self, query, params)
sqlite3.IntegrityError: NOT NULL constraint failed: clan_participant.completed
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "participant_updater.py", line 32, in <module>
message = participant_updater()
File "/home/jamtime/clansite/database_updaters.py", line 548, in participant_updater
update_db()
File "/home/jamtime/clansite/database_updaters.py", line 512, in update_db
character=char_obj
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py", line 653, in create
return super(RelatedManager, self.db_manager(db)).create(**kwargs)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/models/manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/models/query.py", line 394, in create
obj.save(force_insert=True, using=self.db)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/models/base.py", line 807, in save
force_update=force_update, update_fields=update_fields)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/models/base.py", line 837, in save_base
updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/models/base.py", line 923, in _save_table
result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/models/base.py", line 962, in _do_insert
using=using, raw=raw)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/models/manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/models/query.py", line 1076, in _insert
return query.get_compiler(using=using).execute_sql(return_id)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/models/sql/compiler.py", line 1107, in execute_sql
cursor.execute(sql, params)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/backends/utils.py", line 80, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/backends/utils.py", line 65, in execute
return self.cursor.execute(sql, params)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/utils.py", line 94, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/backends/utils.py", line 65, in execute
return self.cursor.execute(sql, params)
File "/home/jamtime/.virtualenvs/clansite/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py", line 328, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.IntegrityError: NOT NULL constraint failed: clan_participant.completed
数据库存在，我已经迁移了所有当前更改。我还在模型的外键字段中设置了null=True和blank=True：
（参与者模型是给出问题的模型）
models.py
class Clan(models.Model):
# stuff...
class Player(models.Model):
# stuff...
class ClanMember(models.Model):
clan = models.ForeignKey(Clan, related_name='ClanMembers')
player = models.OneToOneField(Player, on_delete=models.CASCADE, primary_key=True, related_name="ClanMember")
# stuff...
class Character(models.Model):
player = models.ForeignKey(Player, related_name='Characters')
# stuff...
class Activity(models.Model):
characters = models.ManyToManyField(Character, related_name='Activities')
# stuff...
class Team(models.Model):
activity = models.ForeignKey(Activity, related_name='Teams', db_index=True)
# stuff...
class Participant(models.Model):
related_team = models.ForeignKey(Team, related_name='Participants', db_index=True)
character = models.ForeignKey(Character, on_delete=models.CASCADE, related_name='ParticipationInstances', null=True, blank=True)
displayName = models.CharField(max_length=30, default='')
def __str__(self):
return str(self.related_team.__str__()+' - '+self.displayName)
发生错误的脚本部分：
if not activity.private: # can insert mode separation here
try:
team = activity.Teams.get(teamId=p_fields["team"])
except ObjectDoesNotExist:
if int(p_fields["team"]) == -1:
team = activity.Teams.create(
# stuff...
)
try:
if not team.Participants.filter(displayName=p_fields["displayName"]).exists():
if mods.Player.objects.filter(membership_id=p_fields["membershipId"]).exists():
p_obj = mods.Player.objects.get(membership_id=p_fields["membershipId"])
else:
p_obj = mods.Player(
# stuff...
)
if p_obj.Characters.filter(char_id=p_fields["characterId"]).exists():
char_obj = p_obj.Characters.get(char_id=p_fields["characterId"])
else:
char_obj = p_obj.Characters.create(
# stuff...
)
new_p = team.Participants.create( # This part is giving the error
displayName=p_fields["displayName"], # This part is giving the error
character=char_obj # This part is giving the error, this line specifically
) # This part is giving the error
我也尝试过创建对象并在之后添加字符字段，但是在我尝试添加字符字段的行上会出现相同的错误。
长期坚持这一点，非常感谢任何帮助！
答案 0 :(得分：0)
事实证明，在参与者模型中有一个布尔字段，其默认值设置为无completed = models.BooleanField(default=None)，这对于布尔字段是不可能的。