在执行迁移时出现此错误...
(env) PS C:\Users\ashwi\Documents\GitHub\AMCH\AMCH_Recruiter> python manage.py migrate
Operations to perform:
Apply all migrations: Recruiter, admin, auth, contenttypes, sessions
Running migrations:
Applying Recruiter.0003_auto_20211009_2038...Traceback (most recent call last):
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\models\fields\__init__.py", line 1823, in get_prep_value
return int(value)
ValueError: invalid literal for int() with base 10: ''
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\ashwi\Documents\GitHub\AMCH\AMCH_Recruiter\manage.py", line 22, in <module>
main()
File "C:\Users\ashwi\Documents\GitHub\AMCH\AMCH_Recruiter\manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\core\management\__init__.py", line 419, in execute_from_command_line
utility.execute()
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\core\management\__init__.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\core\management\base.py", line 354, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\core\management\base.py", line 398, in execute
output = self.handle(*args, **options)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\core\management\base.py", line 89, in wrapped
res = handle_func(*args, **kwargs)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\core\management\commands\migrate.py", line 244, in handle
post_migrate_state = executor.migrate(
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\migrations\executor.py", line 117, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\migrations\executor.py", line 147, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\migrations\executor.py", line 227, in apply_migration
state = migration.apply(state, schema_editor)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\migrations\migration.py", line 126, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\migrations\operations\fields.py", line 104, in database_forwards
schema_editor.add_field(
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\backends\sqlite3\schema.py", line 330, in add_field
self._remake_table(model, create_field=field)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\backends\sqlite3\schema.py", line 191, in _remake_table
self.effective_default(create_field)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\backends\base\schema.py", line 324, in effective_default
return field.get_db_prep_save(self._effective_default(field), self.connection)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\models\fields\__init__.py", line 842, in get_db_prep_save
return self.get_db_prep_value(value, connection=connection, prepared=False)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\models\fields\__init__.py", line 2486, in get_db_prep_value
value = self.get_prep_value(value)
File "C:\Users\ashwi\Documents\GitHub\AMCH\env\lib\site-packages\django\db\models\fields\__init__.py", line 1825, in get_prep_value
raise e.__class__(
ValueError: Field 'cid' expected a number but got ''.
模型.py
from django.db import models
import random
from django.db.models.deletion import CASCADE
from django.db.models.fields import AutoField
class candidate(models.Model):
fname=models.CharField("First name ",max_length=20,default="")
lname=models.CharField("Last name ",max_length=20,default="")
email=models.EmailField("Email ",max_length=254,primary_key=True)
password=models.CharField("Password ",max_length=100,default="")
def __str__(self):
return self.email #self.fname+" " +self.lname
class employer(models.Model):
fname=models.CharField("First name ",max_length=20,default="")
lname=models.CharField("Last name ",max_length=20,default="")
email=models.EmailField("Email ",max_length=254,default="")
password=models.CharField("Password ",max_length=100,default="")
def __str__(self):
return self.fname+" " +self.lname
class canDetails(models.Model):
candEmail=models.ForeignKey(candidate,on_delete=models.CASCADE)
location=models.CharField("location ",max_length=30)
role=models.CharField("role ",max_length=20)
cv=models.FileField(upload_to="media/canDetails/",default="")
def __str__(self):
return self.candEmail
class empDetails(models.Model):
empEmail=models.ForeignKey(candidate,on_delete=models.CASCADE)
cmpName=models.CharField("Company Name ",max_length=30)
role=models.CharField("role ",max_length=20)
cv=models.FileField(upload_to="media/empDetails/",default="")
def __str__(self):
return self.empEmail
class jobs(models.Model):
empEmail=models.ForeignKey(candidate,on_delete=models.CASCADE)
location=models.CharField("Location ",max_length=30)
desc=models.CharField("Descriptions ",max_length=3000)
role=models.CharField("role ",max_length=20)
sal=models.CharField("salary ",max_length=20)
def __str__(self):
return self.empEmail
也许我已经创建了一个名为 cid 的主键，假设这样，我已经删除了我之前创建的模型并重新创建了模型，但我仍然收到这些错误错误来自哪里？任何建议将不胜感激..:>
最新的迁移是 0012_alter_candetails_cv.py
# Generated by Django 3.2.8 on 2021-10-13 19:01
from django.db import migrations, models
import django.db.models.deletion
class Migration(migrations.Migration):
initial = True
dependencies = [
('Recruiter', '0010_auto_20211014_0024'),
]
operations = [
migrations.CreateModel(
name='candidate',
fields=[
('fname', models.CharField(default='', max_length=20, verbose_name='First name ')),
('lname', models.CharField(default='', max_length=20, verbose_name='Last name ')),
('email', models.EmailField(max_length=254, primary_key=True, serialize=False, verbose_name='Email ')),
('password', models.CharField(default='', max_length=100, verbose_name='Password ')),
],
),
migrations.CreateModel(
name='employer',
fields=[
('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('fname', models.CharField(default='', max_length=20, verbose_name='First name ')),
('lname', models.CharField(default='', max_length=20, verbose_name='Last name ')),
('email', models.EmailField(default='', max_length=254, verbose_name='Email ')),
('password', models.CharField(default='', max_length=100, verbose_name='Password ')),
],
),
migrations.CreateModel(
name='jobs',
fields=[
('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('location', models.CharField(max_length=30, verbose_name='Location ')),
('desc', models.CharField(max_length=3000, verbose_name='Descriptions ')),
('role', models.CharField(max_length=20, verbose_name='role ')),
('sal', models.CharField(max_length=20, verbose_name='salary ')),
('empEmail', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='Recruiter.candidate')),
],
),
migrations.CreateModel(
name='empDetails',
fields=[
('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('cmpName', models.CharField(max_length=30, verbose_name='Company Name ')),
('role', models.CharField(max_length=20, verbose_name='role ')),
('cv', models.FileField(default='', upload_to='media/empDetails/')),
('empEmail', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='Recruiter.candidate')),
],
),
migrations.CreateModel(
name='canDetails',
fields=[
('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('location', models.CharField(max_length=30, verbose_name='location ')),
('role', models.CharField(max_length=20, verbose_name='role ')),
('cv', models.FileField(default='', upload_to='media/canDetails/')),
('candEmail', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='Recruiter.candidate')),
],
),
]
这是我之前创建的迁移cid
0004_alter_candidate_cid.py 类迁移（migrations.Migration）：
dependencies = [
('Recruiter', '0003_auto_20211009_2038'),
]
operations = [
migrations.AlterField(
model_name='candidate',
name='cid',
field=models.AutoField(default=101, primary_key=True, serialize=False, verbose_name='candidate id'),
),
]
# Generated by Django 3.2.8 on 2021-10-09 15:08
from django.db import migrations, models
class Migration(migrations.Migration):
0003_auto_20211009_2038.cpython-39.py
dependencies = [
('Recruiter', '0002_auto_20211009_2003'),
]
operations = [
migrations.RemoveField(
model_name='candidate',
name='id',
),
migrations.AddField(
model_name='candidate',
name='cid',
field=models.AutoField(default='', primary_key=True, serialize=False, verbose_name='candidate id'),
),
migrations.AlterField(
model_name='candetails',
name='file',
field=models.FileField(default='', max_length=254, upload_to='', verbose_name='CV '),
),
migrations.AlterField(
model_name='candetails',
name='location',
field=models.CharField(default='', max_length=20, verbose_name='Location '),
),
migrations.AlterField(
model_name='candetails',
name='role',
field=models.CharField(default='', max_length=20, verbose_name='role '),
),
migrations.AlterField(
model_name='employer',
name='email',
field=models.EmailField(default='', max_length=254, verbose_name='Email '),
),
migrations.AlterField(
model_name='employer',
name='fname',
field=models.CharField(default='', max_length=20, verbose_name='First name '),
),
migrations.AlterField(
model_name='employer',
name='lname',
field=models.CharField(default='', max_length=20, verbose_name='Last name '),
),
migrations.AlterField(
model_name='employer',
name='password',
field=models.CharField(default='', max_length=100, verbose_name='Password '),
),
]