カスタムユーザーモデルValueError：関連モデルDjango（1.9）

Question

カスタムユーザーモデルをForjgnKeyとしてdjangoのフィールドに追加しようとするとエラーが発生します。認証はCustomUserモデルを使用して作業が、私はこのエラーを取得しているいくつかの理由のためにされています。ここでは

ValueError: Related model 'authentication.UserModel' cannot be resolved 

アプリ/ models.pyである：ここで

from django.db import models 
from django.conf import settings 



class A(models.Model) 
    tender_authority = models.ForeignKey(settings.AUTH_USER_MODEL) 

はsettings.py

ですここで

AUTH_USER_MODEL = 'authentication.UserModel' 

は、プロジェクトのツリー構造である：

myproject 
    settings.py 
authentication 
    models.py ---> UserModel (my custom user model name) Model is present here 
myapp 
    models.py ---> Error happening here 

ありがとうございます。

完全なトレースバック、私は移行しようとしていながら、これが起こっていることを言及するのを忘れてしまった：

Operations to perform: 
    Apply all migrations: auth, admin, authentication, contenttypes,   sessions, Forms 
Running migrations: 
    Rendering model states... DONE 
    Applying Forms.0010_tech_auth_Usermodel_to_User...Traceback (most recent call last): 
File "manage.py", line 10, in <module> 
execute_from_command_line(sys.argv) 
File "/usr/local/lib/python3.5/dist-packages/django/core/management/__init__.py", line 353, in execute_from_command_line 
utility.execute() 
    File "/usr/local/lib/python3.5/dist-packages/django/core/management/__init__.py", line 345, in execute 
self.fetch_command(subcommand).run_from_argv(self.argv) 
    File "/usr/local/lib/python3.5/dist-packages/django/core/management/base.py", line 348, in run_from_argv 
self.execute(*args, **cmd_options) 
    File "/usr/local/lib/python3.5/dist-packages/django/core/management/base.py", line 399, in execute 
output = self.handle(*args, **options) 
    File "/usr/local/lib/python3.5/dist-packages/django/core/management/commands/migrate.py", line 200, in handle 
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial) 
    File "/usr/local/lib/python3.5/dist-packages/django/db/migrations/executor.py", line 92, in migrate 
self._migrate_all_forwards(plan, full_plan, fake=fake, fake_initial=fake_initial) 
    File "/usr/local/lib/python3.5/dist-packages/django/db/migrations/executor.py", line 121, in _migrate_all_forwards 
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial) 
    File "/usr/local/lib/python3.5/dist-packages/django/db/migrations/executor.py", line 198, in apply_migration 
state = migration.apply(state, schema_editor) 
    File "/usr/local/lib/python3.5/dist-packages/django/db/migrations/migration.py", line 123, in apply 
operation.database_forwards(self.app_label, schema_editor, old_state, project_state) 
    File "/usr/local/lib/python3.5/dist-packages/django/db/migrations/operations/fields.py", line 201, in database_forwards 
schema_editor.alter_field(from_model, from_field, to_field) 
    File "/usr/local/lib/python3.5/dist-packages/django/db/backends/base/schema.py", line 454, in alter_field 
new_db_params = new_field.db_parameters(connection=self.connection) 
    File "/usr/local/lib/python3.5/dist-packages/django/db/models/fields/related.py", line 967, in db_parameters 
return {"type": self.db_type(connection), "check": []} 
    File "/usr/local/lib/python3.5/dist-packages/django/db/models/fields/related.py", line 958, in db_type 
rel_field = self.target_field 
    File "/usr/local/lib/python3.5/dist-packages/django/db/models/fields/related.py", line 861, in target_field 
return self.foreign_related_fields[0] 
    File "/usr/local/lib/python3.5/dist-packages/django/db/models/fields/related.py", line 594, in foreign_related_fields 
return tuple(rhs_field for lhs_field, rhs_field in self.related_fields if rhs_field) 
    File "/usr/local/lib/python3.5/dist-packages/django/db/models/fields/related.py", line 581, in related_fields 
self._related_fields = self.resolve_related_fields() 
    File "/usr/local/lib/python3.5/dist-packages/django/db/models/fields/related.py", line 566, in resolve_related_fields 
raise ValueError('Related model %r cannot be resolved' % self.remote_field.model) 
ValueError: Related model 'authentication.UserModel' cannot be resolved 

移行：

「

クラスの移行（migrations.Migration）：

dependencies = [ 
    ('Forms', '0009_revised_tender_changes'), 
] 

operations = [ 
    migrations.AlterField(
     model_name='agreementsanctionmodel', 
     name='bank_details_one', 
     field=models.ForeignKey(blank=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.BankDetailsModel', verbose_name='Bank Details'), 
    ), 
    migrations.AlterField(
     model_name='agreementsanctionmodel', 
     name='contractor', 
     field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.Contractor', verbose_name='Contractor'), 
    ), 
    migrations.AlterField(
     model_name='agreementsanctionmodel', 
     name='contractor_name', 
     field=models.CharField(blank=True, max_length=250, verbose_name='Contractor'), 
    ), 
    migrations.AlterField(
     model_name='agreementsanctionmodel', 
     name='created_on', 
     field=models.DateTimeField(auto_now=True, verbose_name='Created On'), 
    ), 
    migrations.AlterField(
     model_name='agreementsanctionmodel', 
     name='financial_year', 
     field=models.CharField(blank=True, max_length=5, verbose_name='Financial Year'), 
    ), 
    migrations.AlterField(
     model_name='agreementsanctionmodel', 
     name='tender', 
     field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.Tender', verbose_name='Tender'), 
    ), 
    migrations.AlterField(
     model_name='agreementsanctionmodel', 
     name='tender_name', 
     field=models.CharField(blank=True, max_length=50, unique=True, verbose_name='Tender'), 
    ), 
    migrations.AlterField(
     model_name='agreementsanctionmodel', 
     name='updated_on', 
     field=models.DateField(blank=True, default=None, null=True, verbose_name='Updated On'), 
    ), 
    migrations.AlterField(
     model_name='consultant', 
     name='districts', 
     field=models.CharField(max_length=50, null=True, verbose_name='District'), 
    ), 
    migrations.AlterField(
     model_name='consultant', 
     name='email', 
     field=models.EmailField(blank=True, max_length=254, null=True, unique=True, verbose_name='Email ID'), 
    ), 
    migrations.AlterField(
     model_name='consultant', 
     name='first_name', 
     field=models.CharField(default=0, max_length=100, verbose_name='First Name'), 
     preserve_default=False, 
    ), 
    migrations.AlterField(
     model_name='consultant', 
     name='house_number', 
     field=models.CharField(blank=True, max_length=50, null=True, verbose_name='Phone Number'), 
    ), 
    migrations.AlterField(
     model_name='consultant', 
     name='last_name', 
     field=models.CharField(max_length=100, verbose_name='Last Name'), 
    ), 
    migrations.AlterField(
     model_name='consultant', 
     name='middle_name', 
     field=models.CharField(blank=True, max_length=100, null=True, verbose_name='Middle Name'), 
    ), 
    migrations.AlterField(
     model_name='consultant', 
     name='pan_number', 
     field=models.CharField(default=0, max_length=50, unique=True, verbose_name='PAN Number'), 
     preserve_default=False, 
    ), 
    migrations.AlterField(
     model_name='consultant', 
     name='state', 
     field=models.CharField(max_length=50, null=True, verbose_name='State'), 
    ), 
    migrations.AlterField(
     model_name='consultant', 
     name='street_name', 
     field=models.CharField(max_length=50, null=True, verbose_name='Street Name'), 
    ), 
    migrations.AlterField(
     model_name='consultant', 
     name='tin_number', 
     field=models.CharField(default=0, max_length=10, unique=True, verbose_name='TIN Number'), 
     preserve_default=False, 
    ), 
    migrations.AlterField(
     model_name='contractor', 
     name='districts', 
     field=models.CharField(max_length=50, null=True, verbose_name='District'), 
    ), 
    migrations.AlterField(
     model_name='contractor', 
     name='email', 
     field=models.EmailField(blank=True, max_length=254, null=True, unique=True, verbose_name='Email ID'), 
    ), 
    migrations.AlterField(
     model_name='contractor', 
     name='first_name', 
     field=models.CharField(max_length=100, verbose_name='First Name'), 
    ), 
    migrations.AlterField(
     model_name='contractor', 
     name='house_number', 
     field=models.CharField(blank=True, max_length=50, null=True, verbose_name='Phone Number'), 
    ), 
    migrations.AlterField(
     model_name='contractor', 
     name='last_name', 
     field=models.CharField(max_length=100, verbose_name='Last Name'), 
    ), 
    migrations.AlterField(
     model_name='contractor', 
     name='middle_name', 
     field=models.CharField(blank=True, max_length=100, null=True, verbose_name='Middle Name'), 
    ), 
    migrations.AlterField(
     model_name='contractor', 
     name='state', 
     field=models.CharField(max_length=50, null=True, verbose_name='State'), 
    ), 
    migrations.AlterField(
     model_name='contractor', 
     name='street_name', 
     field=models.CharField(max_length=50, null=True, verbose_name='Street Name'), 
    ), 
    migrations.AlterField(
     model_name='locationmodel', 
     name='district', 
     field=models.CharField(max_length=50, verbose_name='District '), 
    ), 
    migrations.AlterField(
     model_name='locationmodel', 
     name='division', 
     field=models.CharField(max_length=50, verbose_name='Division '), 
    ), 
    migrations.AlterField(
     model_name='locationmodel', 
     name='location', 
     field=models.CharField(max_length=50, verbose_name='Location'), 
    ), 
    migrations.AlterField(
     model_name='locationmodel', 
     name='place', 
     field=models.CharField(max_length=50, verbose_name='Place '), 
    ), 
    migrations.AlterField(
     model_name='locationmodel', 
     name='work', 
     field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.WorkModel', verbose_name='Work'), 
    ), 
    migrations.AlterField(
     model_name='nominationmodel', 
     name='created_on', 
     field=models.DateTimeField(auto_now=True, verbose_name='Created On'), 
    ), 
    migrations.AlterField(
     model_name='nominationmodel', 
     name='tender_authority', 
     field=models.ForeignKey(blank=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.TechnicalAuthority', verbose_name='Technical Authority'), 
    ), 
    migrations.AlterField(
     model_name='nominationmodel', 
     name='updated_on', 
     field=models.DateTimeField(blank=True, null=True, verbose_name='Updated On'), 
    ), 
    migrations.AlterField(
     model_name='nominationmodel', 
     name='work_name', 
     field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.WorkModel', verbose_name='Work'), 
    ), 
    migrations.AlterField(
     model_name='pettycontractors', 
     name='districts', 
     field=models.CharField(max_length=50, null=True, verbose_name='District'), 
    ), 
    migrations.AlterField(
     model_name='pettycontractors', 
     name='email', 
     field=models.EmailField(blank=True, max_length=254, null=True, unique=True, verbose_name='Email ID'), 
    ), 
    migrations.AlterField(
     model_name='pettycontractors', 
     name='first_name', 
     field=models.CharField(default=0, max_length=100, verbose_name='First Name'), 
     preserve_default=False, 
    ), 
    migrations.AlterField(
     model_name='pettycontractors', 
     name='house_number', 
     field=models.CharField(blank=True, max_length=50, null=True, verbose_name='Phone Number'), 
    ), 
    migrations.AlterField(
     model_name='pettycontractors', 
     name='last_name', 
     field=models.CharField(max_length=100, verbose_name='Last Name'), 
    ), 
    migrations.AlterField(
     model_name='pettycontractors', 
     name='middle_name', 
     field=models.CharField(blank=True, max_length=100, null=True, verbose_name='Middle Name'), 
    ), 
    migrations.AlterField(
     model_name='pettycontractors', 
     name='pan_number', 
     field=models.CharField(default=0, max_length=50, unique=True, verbose_name='PAN Number'), 
     preserve_default=False, 
    ), 
    migrations.AlterField(
     model_name='pettycontractors', 
     name='state', 
     field=models.CharField(max_length=50, null=True, verbose_name='State'), 
    ), 
    migrations.AlterField(
     model_name='pettycontractors', 
     name='street_name', 
     field=models.CharField(max_length=50, null=True, verbose_name='Street Name'), 
    ), 
    migrations.AlterField(
     model_name='pettycontractors', 
     name='tin_number', 
     field=models.CharField(default=0, max_length=10, unique=True, verbose_name='TIN Number'), 
     preserve_default=False, 
    ), 
    migrations.AlterField(
     model_name='projectmodel', 
     name='created_on', 
     field=models.DateTimeField(auto_now=True, verbose_name='Created On'), 
    ), 
    migrations.AlterField(
     model_name='projectmodel', 
     name='financial_year', 
     field=models.CharField(blank=True, max_length=5, verbose_name='Financial Year'), 
    ), 
    migrations.AlterField(
     model_name='projectmodel', 
     name='project_name', 
     field=models.CharField(blank=True, max_length=250, unique=True, verbose_name='Project Name'), 
    ), 
    migrations.AlterField(
     model_name='projectmodel', 
     name='scheme_name', 
     field=models.CharField(blank=True, max_length=250, verbose_name='Scheme Name'), 
    ), 
    migrations.AlterField(
     model_name='projectmodel', 
     name='updated_on', 
     field=models.DateTimeField(blank=True, null=True, verbose_name='Update On'), 
    ), 
    migrations.AlterField(
     model_name='revisedadministrativesanctionmodel', 
     name='created_on', 
     field=models.DateTimeField(auto_now=True, verbose_name='Created On'), 
    ), 
    migrations.AlterField(
     model_name='revisedadministrativesanctionmodel', 
     name='project', 
     field=models.ForeignKey(blank=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.ProjectModel', verbose_name='Project'), 
    ), 
    migrations.AlterField(
     model_name='revisedadministrativesanctionmodel', 
     name='updated_on', 
     field=models.DateField(blank=True, default=None, null=True, verbose_name='Updated On'), 
    ), 
    migrations.AlterField(
     model_name='revisedtechnicalapprovalmodel', 
     name='authority', 
     field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.TechnicalAuthority', verbose_name='Technical Authority'), 
    ), 
    migrations.AlterField(
     model_name='revisedtechnicalapprovalmodel', 
     name='created_on', 
     field=models.DateTimeField(auto_now=True, verbose_name='Created On'), 
    ), 
    migrations.AlterField(
     model_name='revisedtechnicalapprovalmodel', 
     name='updated_on', 
     field=models.DateField(blank=True, default=None, null=True, verbose_name='Updated On'), 
    ), 
    migrations.AlterField(
     model_name='revisedtechnicalapprovalmodel', 
     name='work_name', 
     field=models.CharField(blank=True, max_length=300, verbose_name='Work'), 
    ), 
    migrations.AlterField(
     model_name='revisedtechnicalsanctionmodel', 
     name='project', 
     field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.ProjectModel', verbose_name='Project'), 
    ), 
    migrations.AlterField(
     model_name='schememodel', 
     name='created_on', 
     field=models.DateTimeField(auto_now=True, verbose_name='Created On'), 
    ), 
    migrations.AlterField(
     model_name='schememodel', 
     name='dept_name', 
     field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.UserDepartment', verbose_name='Department Name'), 
    ), 
    migrations.AlterField(
     model_name='schememodel', 
     name='financial_year', 
     field=models.CharField(blank=True, max_length=5, verbose_name='Financial Year'), 
    ), 
    migrations.AlterField(
     model_name='schememodel', 
     name='scheme_name', 
     field=models.CharField(max_length=250, unique=True, verbose_name='Scheme Name'), 
    ), 
    migrations.AlterField(
     model_name='schememodel', 
     name='total_admin_sanction_amount', 
     field=models.FloatField(verbose_name='Total Admin Sanction Amount'), 
    ), 
    migrations.AlterField(
     model_name='schememodel', 
     name='updated_on', 
     field=models.DateTimeField(blank=True, null=True, verbose_name='Updated On'), 
    ), 
    migrations.AlterField(
     model_name='technicalapprovalmodel', 
     name='created_on', 
     field=models.DateTimeField(auto_now=True, verbose_name='Created On'), 
    ), 
    migrations.AlterField(
     model_name='technicalapprovalmodel', 
     name='financial_year', 
     field=models.CharField(blank=True, max_length=5, verbose_name='Financial Year'), 
    ), 
    migrations.AlterField(
     model_name='technicalapprovalmodel', 
     name='project_name', 
     field=models.CharField(blank=True, max_length=250, verbose_name='Project Name'), 
    ), 
    migrations.AlterField(
     model_name='technicalapprovalmodel', 
     name='updated_on', 
     field=models.DateField(blank=True, null=True, verbose_name='Updated On'), 
    ), 
    migrations.AlterField(
     model_name='technicalapprovalmodel', 
     name='work_name', 
     field=models.CharField(blank=True, max_length=300, verbose_name='Work Name'), 
    ), 
    migrations.AlterField(
     model_name='technicalauthority', 
     name='tender_authority', 
     field=models.ForeignKey(default=0, on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL, verbose_name='Technical Authority'), 
     preserve_default=False, 
    ), 
    migrations.AlterField(
     model_name='technicalsanctionmodel', 
     name='created_on', 
     field=models.DateTimeField(auto_now=True, verbose_name='Created On'), 
    ), 
    migrations.AlterField(
     model_name='technicalsanctionmodel', 
     name='financial_year', 
     field=models.CharField(blank=True, max_length=5, verbose_name='Financial Year'), 
    ), 
    migrations.AlterField(
     model_name='technicalsanctionmodel', 
     name='project_name', 
     field=models.CharField(blank=True, max_length=300, verbose_name='Project Name'), 
    ), 
    migrations.AlterField(
     model_name='technicalsanctionmodel', 
     name='technical_authority', 
     field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.TechnicalAuthority', verbose_name='Technical Authority'), 
    ), 
    migrations.AlterField(
     model_name='technicalsanctionmodel', 
     name='updated_on', 
     field=models.DateTimeField(blank=True, null=True, verbose_name='Update On'), 
    ), 
    migrations.AlterField(
     model_name='technicalwing', 
     name='technical_wing_name', 
     field=models.CharField(max_length=10, null=True, unique=True, verbose_name='Technical Wing'), 
    ), 
    migrations.AlterField(
     model_name='tender', 
     name='created_on', 
     field=models.DateTimeField(auto_now=True, verbose_name='Created On'), 
    ), 
    migrations.AlterField(
     model_name='tender', 
     name='updated_on', 
     field=models.DateTimeField(blank=True, null=True, verbose_name='Updated On'), 
    ), 
    migrations.AlterField(
     model_name='userdepartment', 
     name='department_name', 
     field=models.CharField(max_length=50, null=True, unique=True, verbose_name='Department Name'), 
    ), 
    migrations.AlterField(
     model_name='userdepartment', 
     name='department_reference', 
     field=models.CharField(max_length=7, null=True, unique=True, verbose_name='Department Name'), 
    ), 
    migrations.AlterField(
     model_name='workmodel', 
     name='created_on', 
     field=models.DateTimeField(auto_now=True, verbose_name='Created On'), 
    ), 
    migrations.AlterField(
     model_name='workmodel', 
     name='financial_year', 
     field=models.CharField(blank=True, max_length=5, verbose_name='Financial Year'), 
    ), 
    migrations.AlterField(
     model_name='workmodel', 
     name='project_name', 
     field=models.CharField(blank=True, max_length=250, verbose_name='Project Name'), 
    ), 
    migrations.AlterField(
     model_name='workmodel', 
     name='updated_on', 
     field=models.DateTimeField(blank=True, null=True, verbose_name='Updated On'), 
    ), 
    migrations.AlterField(
     model_name='workmodel', 
     name='work_name', 
     field=models.CharField(blank=True, max_length=300, unique=True, verbose_name='Work Name'), 
    ), 
    migrations.AlterField(
     model_name='workordermodel', 
     name='created_on', 
     field=models.DateTimeField(auto_now=True, verbose_name='Created On'), 
    ), 
    migrations.AlterField(
     model_name='workordermodel', 
     name='tender_authority', 
     field=models.ForeignKey(blank=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.TechnicalAuthority', verbose_name='Technical Authority'), 
    ), 
    migrations.AlterField(
     model_name='workordermodel', 
     name='updated_on', 
     field=models.DateTimeField(blank=True, null=True, verbose_name='Updated On'), 
    ), 
    migrations.AlterField(
     model_name='workordermodel', 
     name='work_name', 
     field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='Forms.WorkModel', verbose_name='Work'), 
    ), 
] 

'

Answer 1

ユーザーモデルを追加する移行の依存関係が欠落しているようです。なぜそれが不足しているのか分かりませんが、手動で追加して移行を再度実行してみてください：

dependencies = [ 
    migrations.swappable_dependency(settings.AUTH_USER_MODEL), 
    ('Forms', '0009_revised_tender_changes'), 
]