我有一个自定义用户模型，设置为
class User(AbstractBaseUser, PermissionsMixin):
field1 = models.CharField(max_length=11, unique = True, primary_key = True)
field2 = models.CharField(max_length=5)
USERNAME_FIELD = 'field1'
class Meta:
app_label = 'accounts'
db_table = "user"
我有几个与主键字段1相关的其他模型，这种关系效果很好。
我的问题是添加一个现有的数据库表，其主键是我的用户模型中的field2。
class ModelWantingToRelateOnField2(models.Model):
field2 = models.OneToOneField(settings.AUTH_USER_MODEL, db_column='field2',primary_key=True, serialize=False,
max_length=5)
class Meta:
managed = False
db_table = 'Table2'
当我添加一对一时，我的vizgraph数据模型显示它试图关联field1，当我需要在此模型上为field2发生关系而我的所有其他关系都在field1上。
我尝试过使用ForeignKey和related_name，但在迁移后，模型会尝试在field1上进行关联。
尝试在我的User模型之前加载table2时，我收到以下SQL错误：
django.db.utils.ProgrammingError: ('42000', "[42000] [Microsoft][ODBC SQL Server Driver][SQL Server]There are no primary
or candidate keys in the referenced table 'Table2' that match the referencing column list in the foreign ke
y 'user_field2_id_8e77ca93_fk_Table2_Field2'. (1776) (SQLExecDirectW)")
首先使用ModelWantingToRelateOnField2 / FacilityDimension翻转的模型：
class FacilityDimension(models.Model):
unit_num = models.CharField(db_column='Unit_Num', max_length=5, blank=True, null=True) # Field name made lowercase.
company_code = models.CharField(db_column='Company_Code', max_length=1, blank=True, null=True) # Field name made lowercase.
coid = models.CharField(db_column='Coid',primary_key=True, serialize=False, max_length=5, unique = True) # Field name made lowercase.
coid_name = models.CharField(db_column='COID_Name', max_length=50, blank=True, null=True) # Field name made lowercase.
c_level = models.CharField(db_column='C_Level', max_length=6, blank=True, null=True) # Field name made lowercase.
company_name = models.CharField(db_column='Company_Name', max_length=50, blank=True, null=True) # Field name made lowercase.
s_level = models.CharField(db_column='S_Level', max_length=6, blank=True, null=True) # Field name made lowercase.
sector_name = models.CharField(db_column='Sector_Name', max_length=50, blank=True, null=True) # Field name made lowercase.
b_level = models.CharField(db_column='B_Level', max_length=6, blank=True, null=True) # Field name made lowercase.
group_name = models.CharField(db_column='Group_Name', max_length=50, blank=True, null=True) # Field name made lowercase.
r_level = models.CharField(db_column='R_Level', max_length=6, blank=True, null=True) # Field name made lowercase.
division_name = models.CharField(db_column='Division_Name', max_length=50, blank=True, null=True) # Field name made lowercase.
d_level = models.CharField(db_column='D_Level', max_length=6, blank=True, null=True) # Field name made lowercase.
market_name = models.CharField(db_column='Market_Name', max_length=50, blank=True, null=True) # Field name made lowercase.
f_level = models.CharField(db_column='F_Level', max_length=6, blank=True, null=True) # Field name made lowercase.
cons_facility_name = models.CharField(db_column='Cons_Facility_Name', max_length=50, blank=True, null=True) # Field name made lowercase.
lob_code = models.CharField(db_column='LOB_Code', max_length=3, blank=True, null=True) # Field name made lowercase.
lob_name = models.CharField(db_column='LOB_Name', max_length=20, blank=True, null=True) # Field name made lowercase.
sub_lob_code = models.CharField(db_column='Sub_LOB_Code', max_length=3, blank=True, null=True) # Field name made lowercase.
sub_lob_name = models.CharField(db_column='Sub_LOB_Name', max_length=20, blank=True, null=True) # Field name made lowercase.
state_code = models.CharField(db_column='State_Code', max_length=2, blank=True, null=True) # Field name made lowercase.
pas_id_current = models.CharField(db_column='PAS_ID_Current', max_length=8, blank=True, null=True) # Field name made lowercase.
pas_current_name = models.CharField(db_column='PAS_Current_Name', max_length=40, blank=True, null=True) # Field name made lowercase.
pas_id_future = models.CharField(db_column='PAS_ID_Future', max_length=8, blank=True, null=True) # Field name made lowercase.
pas_future_name = models.CharField(db_column='PAS_Future_Name', max_length=40, blank=True, null=True) # Field name made lowercase.
summary_7_member_ind = models.CharField(db_column='Summary_7_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
summary_8_member_ind = models.CharField(db_column='Summary_8_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
summary_phys_svc_member_ind = models.CharField(db_column='Summary_Phys_Svc_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
summary_asd_member_ind = models.CharField(db_column='Summary_ASD_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
summary_imaging_member_ind = models.CharField(db_column='Summary_Imaging_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
summary_oncology_member_ind = models.CharField(db_column='Summary_Oncology_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
summary_cath_lab_member_ind = models.CharField(db_column='Summary_Cath_Lab_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
summary_intl_member_ind = models.CharField(db_column='Summary_Intl_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
summary_other_member_ind = models.CharField(db_column='Summary_Other_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
pas_coid = models.CharField(db_column='PAS_COID', max_length=5, blank=True, null=True) # Field name made lowercase.
pas_status = models.CharField(db_column='PAS_Status', max_length=1, blank=True, null=True) # Field name made lowercase.
company_code_operations = models.CharField(db_column='Company_Code_Operations', max_length=3, blank=True, null=True) # Field name made lowercase.
osg_pas_ind = models.CharField(db_column='OSG_PAS_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
abs_facility_member_ind = models.CharField(db_column='ABS_Facility_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
abl_facility_member_ind = models.CharField(db_column='ABL_Facility_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
intl_pmis_member_ind = models.CharField(db_column='INTL_PMIS_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
hsc_member_ind = models.CharField(db_column='HSC_Member_Ind', max_length=1, blank=True, null=True) # Field name made lowercase.
loaddate = models.DateTimeField(db_column='LoadDate', blank=True, null=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'Facility_Dimension'
class User(AbstractBaseUser, PermissionsMixin):
email = models.EmailField(unique=True)
username = models.CharField(max_length=7, unique=True)
formattedusername = models.CharField(max_length=11, unique=True, primary_key = True)
first_name = models.CharField(max_length=40)
last_name = models.CharField(max_length=140)
date_joined = models.DateTimeField(default=timezone.now)
is_active = models.BooleanField(default=True)
is_staff = models.BooleanField(default=False)
is_cfo = models.BooleanField(default=False)
facility = models.CharField(max_length=140)
officename = models.CharField(max_length=100)
jobdescription = models.CharField(max_length=140)
positioncode = models.CharField(max_length = 100)
positiondescription = models.CharField(max_length=140)
coid = models.ForeignKey(FacilityDimension, max_length=5)
streetaddress = models.CharField(max_length=140)
title = models.CharField(max_length=100)
USERNAME_FIELD = 'username'
class Meta:
app_label = 'accounts'
db_table = "user"
def save(self, *args, **kwargs):
self.formattedusername = '{domain}\{username}'.format(
domain='HCA', username=self.username)
super(User, self).save(*args, **kwargs);
def get_short_name(self):
return self.username
# REQUIRED_FIELDS = "username"
def __str__(self):
return '%s - %s %s' % (self.username, self.first_name, self.last_name)
class QvDatareducecfo(models.Model):
cfo_fname = models.CharField(db_column='CFO_FName', max_length=100, blank=True, null=True) # Field name made lowercase.
cfo_lname = models.CharField(db_column='CFO_LName', max_length=100, blank=True, null=True) # Field name made lowercase.
cfo_ntname = models.OneToOneField(settings.AUTH_USER_MODEL,db_column='CFO_NTName',max_length=11, primary_key=True) # Field name made lowercase.
cfo_type = models.IntegerField(db_column='CFO_Type', blank=True, null=True) # Field name made lowercase.
org_level_id = models.IntegerField(db_column='Org_Level_ID', blank=True, null=True) # Field name made lowercase.
org_level = models.CharField(db_column='Org_Level', max_length=255, blank=True, null=True) # Field name made lowercase.
unit_no = models.CharField(db_column='Unit_No', max_length=10, blank=True, null=True) # Field name made lowercase.
dr_code = models.CharField(db_column='DR_Code', max_length=255, blank=True, null=True) # Field name made lowercase.
dr_name = models.CharField(db_column='DR_Name', max_length=255, blank=True, null=True) # Field name made lowercase.
cfo_dr_code = models.CharField(db_column='CFO_DR_Code', max_length=255, blank=True, null=True) # Field name made lowercase.
cfo_dr_name = models.CharField(db_column='CFO_DR_Name', max_length=255, blank=True, null=True) # Field name made lowercase.
b_level = models.CharField(db_column='B_Level', max_length=6, blank=True, null=True) # Field name made lowercase.
group_name = models.CharField(db_column='Group_Name', max_length=255, blank=True, null=True) # Field name made lowercase.
load_date = models.DateTimeField(db_column='Load_Date', blank=True, null=True) # Field name made lowercase.
beg_date = models.DateTimeField(db_column='Beg_Date', blank=True, null=True) # Field name made lowercase.
end_date = models.DateTimeField(db_column='End_Date', blank=True, null=True) # Field name made lowercase.
active = models.IntegerField(db_column='Active', blank=True, null=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'QV_DataReduceCFO'
def __str__(self):
return str(self.cfo_ntname)
class QvReportList(models.Model):
qv_dept_id = models.CharField(db_column='QV_Dept_ID', max_length=100) # Field name made lowercase.
report_id = models.CharField(db_column='Report_ID',primary_key=True, max_length=100, serialize=False) # Field name made lowercase.
report_name = models.CharField(db_column='Report_Name', max_length=255, blank=True, null=True) # Field name made lowercase.
report_name_sc = models.CharField(db_column='Report_Name_SC', max_length=255, blank=True, null=True) # Field name made lowercase.
qv_filename = models.CharField(db_column='QV_FileName', max_length=255, blank=True, null=True) # Field name made lowercase.
report_access = models.CharField(db_column='Report_Access', max_length=20, blank=True, null=True) # Field name made lowercase.
report_group_id = models.IntegerField(db_column='Report_Group_ID', blank=True, null=True) # Field name made lowercase.
report_sub_group_id = models.IntegerField(db_column='Report_Sub_Group_ID', blank=True, null=True) # Field name made lowercase.
load_date = models.DateTimeField(db_column='Load_Date', blank=True, null=True) # Field name made lowercase.
approver_fname = models.CharField(db_column='Approver_FName', max_length=255, blank=True, null=True) # Field name made lowercase.
approver_lname = models.CharField(db_column='Approver_LName', max_length=255, blank=True, null=True) # Field name made lowercase.
approver_ntname = models.CharField(db_column='Approver_NTName', max_length=255, blank=True, null=True) # Field name made lowercase.
beg_date = models.DateTimeField(db_column='Beg_Date', blank=True, null=True) # Field name made lowercase.
end_date = models.DateTimeField(db_column='End_Date', blank=True, null=True) # Field name made lowercase.
active = models.IntegerField(db_column='Active', blank=True, null=True) # Field name made lowercase.
approval_id = models.IntegerField(db_column='Approval_ID', blank=True, null=True) # Field name made lowercase.
role_based_id = models.IntegerField(db_column='Role_Based_ID', blank=True, null=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'QV_Report_List'
class QVReportAccess(models.Model):
user_status = models.CharField(db_column='User_Status', max_length = 20) # Field name made lowercase.
ntname = models.OneToOneField(settings.AUTH_USER_MODEL,db_column='NTName', max_length=11,primary_key=True, serialize=False) # Field name made lowercase.
report_name = models.CharField(db_column='Report_Name', max_length=50, blank=True, null=True) # Field name made lowercase.
report_name_sc = models.CharField(db_column='Report_Name_SC', max_length=30, blank=True, null=True) # Field name made lowercase.
datareduce_report_code = models.IntegerField(db_column='DataReduce_Report_Code', blank=True, null=True) # Field name made lowercase.
role_based_id = models.IntegerField(db_column='Role_Based_ID', blank=True, null=True) # Field name made lowercase.
report_id = models.OneToOneField(QvReportList,db_column='Report_ID', max_length=100, blank=True, null=True) # Field name made lowercase.
report_group_id = models.IntegerField(db_column='Report_Group_ID', blank=True, null=True) # Field name made lowercase.
report_access = models.CharField(db_column='Report_Access', max_length=50, blank=True, null=True) # Field name made lowercase.
sr_datareduce_summary_code = models.CharField(db_column='SR_DataReduce_Summary_Code', max_length=10, blank=True, null=True) # Field name made lowercase.
sr_datareduce_patient_code = models.CharField(db_column='SR_DataReduce_Patient_Code', max_length=10, blank=True, null=True) # Field name made lowercase.
userid = models.IntegerField(db_column='UserID', blank=True, null=True) # Field name made lowercase.
user_group_id = models.IntegerField(db_column='User_Group_ID', blank=True, null=True)
access_level_id = models.IntegerField(db_column='Access_Level_ID', blank=True, null=True)
active = models.IntegerField(db_column='Active', blank=True, null=True)
qv_statusid = models.IntegerField(db_column='QV_StatusID', blank=True, null=True)
employee_status_id = models.IntegerField(db_column='Employee_Status_ID', blank = True, null = True)
new_user = models.IntegerField(db_column='New_User', blank = True, null = True)
new_access = models.IntegerField(db_column='New_Access', blank = True, null = True)
new_report = models.IntegerField(db_column='New_Report', blank = True, null = True)
changed_row = models.IntegerField(db_column='Changed_Row',blank = True, null = True)
last_change_date = models.DateTimeField(db_column='Last_Change_Date', blank=True, null=True) # Field name made lowercase.
access_beg_date = models.DateTimeField(db_column='Access_Beg_Date', blank=True, null=True) # Field name made lowercase.
access_end_date = models.DateTimeField(db_column='Access_End_Date', blank=True, null=True) # Field name made lowercase.
report_beg_date = models.DateTimeField(db_column='Report_Beg_Date', blank=True, null=True) # Field name made lowercase.
report_end_date = models.DateTimeField(db_column='Report_End_Date', blank=True, null=True) # Field name made lowercase.
qv_startdate = models.DateTimeField(db_column='QV_StartDate', blank=True, null=True) # Field name made lowercase.
load_date = models.DateTimeField(db_column='Load_Date', blank=True, null=True) # Field name made lowercase.
class Meta:
managed = False
db_table = 'QV_ReportAccess'
class QVFormAccessRequest(models.Model):
ntname = models.CharField(max_length=11)
first_name = models.CharField(max_length=40)
last_name = models.CharField(max_length=140)
coid = models.CharField(max_length=5)
datareducecode = models.CharField(max_length=2500)
facility = models.CharField(max_length=140)
title = models.CharField(max_length=100)
report_id = models.CharField(max_length=100)
accesslevel_id = models.CharField(max_length=100)
phi = models.BooleanField(default=False)
access_beg_date = models.DateTimeField(blank=True, null=True) # Field name made lowercase.
access_end_date = models.DateTimeField(blank=True, null=True) # Field name made lowercase.
class Meta:
managed = True
db_table = 'QV_FormAccessRequest'
class DjangoMigrations(models.Model):
app = models.CharField(max_length=255)
name = models.CharField(max_length=255)
applied = models.DateTimeField()
class Meta:
managed = False
db_table = 'django_migrations'
class Sysdiagrams(models.Model):
name = models.CharField(max_length=128)
principal_id = models.IntegerField()
diagram_id = models.AutoField(primary_key=True)
version = models.IntegerField(blank=True, null=True)
definition = models.BinaryField(blank=True, null=True)
class Meta:
managed = False
db_table = 'sysdiagrams'
unique_together = (('principal_id', 'name'),)
删除所有django表后，这是我的移民：
WARNINGS:
accounts.User.coid: (fields.W342) Setting unique=True on a ForeignKey has the same effect as using a OneToOneField.
HINT: ForeignKey(unique=True) is usually better served by a OneToOneField.
Migrations for 'accounts':
accounts\migrations\0001_initial.py
- Create model DjangoMigrations
- Create model FacilityDimension
- Create model QvDatareducecfo
- Create model QVReportAccess
- Create model QvReportList
- Create model Sysdiagrams
PS C:\python\security> python manage.py makemigrations
System check identified some issues:
WARNINGS:
accounts.User.coid: (fields.W342) Setting unique=True on a ForeignKey has the same effect as using a OneToOneField.
HINT: ForeignKey(unique=True) is usually better served by a OneToOneField.
Migrations for 'accounts':
accounts\migrations\0002_qvformaccessrequest_user.py
- Create model User
- Create model QVFormAccessRequest
以下是运行migrate时的错误消息：
System check identified some issues:
WARNINGS:
accounts.User.coid: (fields.W342) Setting unique=True on a ForeignKey has the same effect as using a OneToOneField.
HINT: ForeignKey(unique=True) is usually better served by a OneToOneField.
Operations to perform:
Apply all migrations: accounts, admin, auth, contenttypes, sessions
Running migrations:
Applying contenttypes.0001_initial... OK
Applying contenttypes.0002_remove_content_type_name... OK
Applying auth.0001_initial... OK
Applying auth.0002_alter_permission_name_max_length... OK
Applying auth.0003_alter_user_email_max_length... OK
Applying auth.0004_alter_user_username_opts... OK
Applying auth.0005_alter_user_last_login_null... OK
Applying auth.0006_require_contenttypes_0002... OK
Applying auth.0007_alter_validators_add_error_messages... OK
Applying auth.0008_alter_user_username_max_length... OK
Applying accounts.0001_initial... OK
Applying accounts.0002_qvformaccessrequest_user...Traceback (most recent call last):
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\utils.py", line 65, in execute
return self.cursor.execute(sql, params)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\sql_server\pyodbc\base.py", line 545, in execute
return self.cursor.execute(sql, params)
pyodbc.ProgrammingError: ('42000', "[42000] [Microsoft][ODBC SQL Server Driver][SQL Server]There are no primary or candidate keys in the referenced table 'F
acility_Dimension' that match the referencing column list in the foreign key 'user_coid_id_8e77ca93_fk_Facility_Dimension_Coid'. (1776) (SQLExecDirectW)")
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 22, in <module>
execute_from_command_line(sys.argv)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\management\__init__.py", line 364, in execute_from_command_lin
e
utility.execute()
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\management\__init__.py", line 356, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\management\base.py", line 283, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\management\base.py", line 330, in execute
output = self.handle(*args, **options)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\core\management\commands\migrate.py", line 204, in handle
fake_initial=fake_initial,
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\migrations\executor.py", line 115, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\migrations\executor.py", line 145, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\migrations\executor.py", line 244, in apply_migration
state = migration.apply(state, schema_editor)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\base\schema.py", line 93, in __exit__
self.execute(sql)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\sql_server\pyodbc\schema.py", line 604, in execute
cursor.execute(sql, params)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\utils.py", line 80, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\utils.py", line 65, in execute
return self.cursor.execute(sql, params)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\utils.py", line 94, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\utils\six.py", line 685, in reraise
raise value.with_traceback(tb)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\django\db\backends\utils.py", line 65, in execute
return self.cursor.execute(sql, params)
File "C:\Users\HFA9592\AppData\Local\Programs\Python\Python36\lib\site-packages\sql_server\pyodbc\base.py", line 545, in execute
return self.cursor.execute(sql, params)
django.db.utils.ProgrammingError: ('42000', "[42000] [Microsoft][ODBC SQL Server Driver][SQL Server]There are no primary or candidate keys in the referenced
table 'Facility_Dimension' that match the referencing column list in the foreign key 'user_coid_id_8e77ca93_fk_Facility_Dimension_Coid'. (1776) (SQLExecDir
ectW)")
答案 0 :(得分：1)
听起来多个用户可以拥有相同的FacilityDimension。因此，您应该在User模型上拥有外键，而不是FacilityDimension。
class User(AbstractBaseUser, PermissionsMixin):
coid = models.ForeignKey('FacilityDimension', db_constraint=False)
如果目标模型上不存在主键/唯一索引，Django将无法创建外键约束。您可以通过设置db_constraint来阻止Django创建约束。
如果您使用字符串'FacilityDimension'而不是类FacilityDimension，则不必重新订购模型。
您不需要设置to_field，因为外键指向FacilityDimension.coid的{{1}}字段。