我正在尝试在 cookeicutter 上建立一个网站，我创建了一个名为“bots”的新应用程序，并在模型中添加了一个名为 Trade 的类，其中列出了 2 个参数，“标题”和“单位”。迁移并运行服务器后，当我打开管理面板并单击面板中的“+ 添加”按钮以创建交易时（见图）。Django 网页返回此错误：
django.db.utils.ProgrammingError: relation "bot_trade" does not exist
LINE 1: ...."id", "bots_unit"."sell", "bots_unit"."buy" FROM "bots_unit...
附加信息：使用 postgreSQL 在 docker 中运行我的 django
模型.py
from django.db import models
from datetime import date
#from django.contrib.auth.models import AbstractUser
#from .models import User
from django.urls import reverse
from django.urls import reverse_lazy
from django.conf import settings
import uuid
class Unit(models.Model):
TRADE_UNIT = (
('ETH', 'Ethereum'),
('BTC', 'Bitcoin'),
('LTC', 'Litecoin'),
('IOT', 'IOTA'),
('OMG', 'OmiseGo'),
('BCH', 'BitcoinCash'),
)
sell = models.CharField(max_length=3, choices=TRADE_UNIT, blank=True, default='ETH', help_text='Currency to Sell')
buy = models.CharField(max_length=3, choices=TRADE_UNIT, blank=True, default='BTC', help_text='Currency to Buy')
def get_absolute_url(self):
"""
Returns the url to access a particular author instance.
"""
return reverse('unit-detail', args=[str(self.id)])
def __str__(self):
"""
String for representing the Model object.
"""
return '%s, %s' % (self.sell, self.buy)
class Meta:
db_table = 'bots_unit'
ordering = ['sell','buy']
class Trade(models.Model):
title = models.CharField(max_length=200)
unit = models.ForeignKey('Unit', on_delete=models.SET_NULL, null=True)
def __str__(self):
"""
String for representing the Model object.
"""
return self.title
def get_absolute_url(self):
"""
Returns the url to access a particular book instance.
"""
return reverse('trade-detail', args=[str(self.id)])
class Meta:
db_table = 'bots_trade'
class TradeInstance(models.Model):
"""
Model representing a specific copy of a book (i.e. that can be borrowed from the library).
"""
id = models.UUIDField(primary_key=True, default=uuid.uuid4, help_text="Unique ID for this particular trade across whole database")
trade = models.ForeignKey('Trade', on_delete=models.SET_NULL, null=True)
amount = models.CharField(max_length=200)
price = models.CharField(max_length=200)
imprint = models.CharField(max_length=200)
time_initiated = models.DateTimeField(null=True, blank=True)
#initiator = models.ForeignKey(AbstractUser,
on_delete=models.SET_NULL, null=True, blank=True)
position_status = (
('L', 'Long'),
('S', 'Short'),
)
position = models.CharField(max_length=1, choices=position_status, blank=True, default='L', help_text='Order Type')
class Meta:
ordering = ["position"]
def __str__(self):
"""
String for representing the Model object
"""
return '%s (%s)' % (self.id,self.trade.title)
管理员.py
from django.contrib import admin
from .models import Trade, TradeInstance, Unit
# Define the admin class
@admin.register(Trade)
class TradeAdmin(admin.ModelAdmin):
pass
@admin.register(Unit)
class UnitAdmin(admin.ModelAdmin):
pass
更新1： 我几次删除了迁移文件夹中的内容，但这是运行“makemigrations”和“迁移”后当前在“0001.initial.py”中的内容：
# -*- coding: utf-8 -*-
# Generated by Django 1.10.8 on 2017-10-12 17:55
from __future__ import unicode_literals
from django.db import migrations, models
import django.db.models.deletion
import uuid
class Migration(migrations.Migration):
initial = True
dependencies = [
]
operations = [
migrations.CreateModel(
name='Trade',
fields=[
('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('title', models.CharField(max_length=200)),
],
),
migrations.CreateModel(
name='TradeInstance',
fields=[
('id', models.UUIDField(default=uuid.uuid4, help_text='Unique ID for this particular trade across whole database', primary_key=True, serialize=False)),
('amount', models.CharField(max_length=200)),
('price', models.CharField(max_length=200)),
('imprint', models.CharField(max_length=200)),
('time_initiated', models.DateTimeField(blank=True, null=True)),
('position', models.CharField(blank=True, choices=[('L', 'Long'), ('S', 'Short')], default='L', help_text='Order Type', max_length=1)),
('trade', models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, to='bots.Trade')),
],
options={
'ordering': ['position'],
},
),
migrations.CreateModel(
name='Unit',
fields=[
('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
('sell', models.CharField(blank=True, choices=[('ETH', 'Ethereum'), ('BTC', 'Bitcoin'), ('LTC', 'Litecoin'), ('IOT', 'IOTA'), ('OMG', 'OmiseGo'), ('BCH', 'BitcoinCash')], default='ETH', help_text='Currency to Sell', max_length=3)),
('buy', models.CharField(blank=True, choices=[('ETH', 'Ethereum'), ('BTC', 'Bitcoin'), ('LTC', 'Litecoin'), ('IOT', 'IOTA'), ('OMG', 'OmiseGo'), ('BCH', 'BitcoinCash')], default='BTC', help_text='Currency to Buy', max_length=3)),
],
options={
'ordering': ['sell', 'buy'],
},
),
migrations.AddField(
model_name='trade',
name='unit',
field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, to='bots.Unit'),
),
]
当我运行“showmigrations”时：
dominic@dom-Inspiron-7559:~/Desktop/Projects/vickibot/vicki$ docker-compose -focal.yml run django python manage.py showmigrations
Postgres is up - continuing...
account
[X] 0001_initial
[X] 0002_email_max_length
admin
[X] 0001_initial
[X] 0002_logentry_remove_auto_add
auth
[X] 0001_initial
[X] 0002_alter_permission_name_max_length
[X] 0003_alter_user_email_max_length
[X] 0004_alter_user_username_opts
[X] 0005_alter_user_last_login_null
[X] 0006_require_contenttypes_0002
[X] 0007_alter_validators_add_error_messages
[X] 0008_alter_user_username_max_length
bots
[X] 0001_initial
contenttypes
[X] 0001_initial
[X] 0002_remove_content_type_name
sessions
[X] 0001_initial
sites
[X] 0001_initial
[X] 0002_alter_domain_unique
[X] 0003_set_site_domain_and_name
socialaccount
[X] 0001_initial
[X] 0002_token_max_lengths
[X] 0003_extra_data_default_dict
users
[X] 0001_initial
更新2：
'manage.py migrate --fake bots zero'输出：
dominic@dom-Inspiron-7559:~/Desktop/Projects/vickibot/vicki$ **docker-compose -f local.yml run django python manage.py migrate --fake bots zero**
Postgres is up - continuing...
Operations to perform:
Unapply all migrations: bots
Running migrations:
Rendering model states... DONE
Unapplying bots.0001_initial... FAKED
“manage.py 迁移机器人”输出：
dominic@dom-Inspiron-7559:~/Desktop/Projects/vickibot/vicki$ docker-compose -f local.yml run django python manage.py migrate bots
Postgres is up - continuing...
Operations to perform:
Apply all migrations: bots
Running migrations:
Applying bots.0001_initial... OK