Question

最近将Django从1.7升级到1.8。将PRD DB转储到DEV中。不要关心DB for dev中的任何迁移，所以：

删除我的应用中的迁移文件夹。
从django_migrations表中删除所有行。

运行此：

python manage.py makemigrations website

提供文件：

# -*- coding: utf-8 -*-
from __future__ import unicode_literals

from django.db import migrations, models
import django.db.models.deletion


class Migration(migrations.Migration):

dependencies = [
]

operations = [
    migrations.CreateModel(
        name='HistoricalStock',
        fields=[
            ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
            ('period_date', models.DateField()),
            ('close', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('open', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('day_high', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('day_low', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('change', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('average_gain', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('average_loss', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('rsi', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('true_range', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('average_true_range', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('price_average_true_range', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('thirty_day_constant_maturity_vol_skew', models.DecimalField(default=0.0, null=True, max_digits=20, decimal_places=10, blank=True)),
        ],
        options={
            'ordering': ['period_date'],
        },
    ),
    migrations.CreateModel(
        name='Industry',
        fields=[
            ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
            ('group', models.CharField(unique=True, max_length=40, verbose_name=b'name')),
            ('slug', models.SlugField(unique=True)),
        ],
    ),
    migrations.CreateModel(
        name='Sector',
        fields=[
            ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
            ('group', models.CharField(unique=True, max_length=40, verbose_name=b'name')),
            ('slug', models.SlugField(unique=True)),
        ],
    ),
    migrations.CreateModel(
        name='Stock',
        fields=[
            ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
            ('ticker', models.CharField(max_length=20)),
            ('profile', models.TextField()),
            ('name', models.CharField(max_length=40)),
            ('broker_rating', models.DecimalField(default=0.0, null=True, max_digits=10, decimal_places=2, blank=True)),
            ('ranking_industry', models.CharField(max_length=40, null=True, blank=True)),
            ('ranking_industry_upper_percent', models.DecimalField(null=True, max_digits=20, decimal_places=10, blank=True)),
            ('country', models.CharField(max_length=40, null=True, blank=True)),
            ('has_options', models.BooleanField(default=False)),
            ('current_stock_price', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('change', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('change_percent', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('open', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('day_high', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('day_low', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('ex_div_date', models.DateField(null=True, blank=True)),
            ('pay_div_date', models.DateField(null=True, blank=True)),
            ('earnings_date', models.DateField(null=True, blank=True)),
            ('vol', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('pe', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('mkt_cap', models.DecimalField(default=0, max_digits=40, decimal_places=0)),
            ('div_yield', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('div_amount', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('year_high', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('year_low', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('day180pc', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('day360pc', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('instpct', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('insidepct', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('earnings_share', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('fifty_ma', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('two_hundred_ma', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('std_dev', models.DecimalField(default=0.0, max_digits=20, decimal_places=10)),
            ('stats_period', models.IntegerField(default=0)),
            ('last_refreshed', models.DateTimeField(null=True, editable=False, blank=True)),
            ('industry', models.ForeignKey(on_delete=django.db.models.deletion.SET_NULL, blank=True, to='website.Industry', null=True)),
            ('sector', models.ForeignKey(on_delete=django.db.models.deletion.SET_NULL, blank=True, to='website.Sector', null=True)),
        ],
    ),
    migrations.AddField(
        model_name='industry',
        name='sector',
        field=models.ForeignKey(to='website.Sector'),
    ),
    migrations.AddField(
        model_name='historicalstock',
        name='stock',
        field=models.ForeignKey(to='website.Stock'),
    ),
    migrations.AlterUniqueTogether(
        name='historicalstock',
        unique_together=set([('stock', 'period_date')]),
    ),
]

看起来很好，4个型号，在同一个文件中有几个FK模型。

然后，运行假货：

python manage.py migrate website --fake

它疯了：

ValueError: Lookup failed for model referenced by field keyedcache.Stock.sector: website.Sector

这说app keyedcache没有找到对模型Sector的引用？ keyedcache与它有什么关系？

Keyedcache是我安装的应用程序。

如果我跑：

python manage.py migrate keyedcache --fake

它没有说明要移植。

你走了一圈又一圈。

我已经在Django 1.7中完成了数百次，完全没有任何问题。 1.8导致了这种情况发生了变化。

怎么回事？

Answer 1

这是一条充满了许多其他人在你面前旅行的陷阱的道路。首先要做的是再次清理迁移。然后清除所有陈旧的package main import ( "fmt" "path/to/your/factory" _ "path/to/custom/pkga" _ "path/to/custom/pkgb" //add more packages ... ) func main() { a, _ := factory.New("pkga.Alpha") b, _ := factory.New("pkgb.Beta") c, _ := factory.New("pkga.Gamma") fmt.Printf("%T %T %T\n", a, b, c) }文件。这一步非常重要。

之后你需要做

.pyc

适用于所有应用。那么只有你应该运行

./manage.py makemigrations myapp

Django makemigrations 1.8.18 ValueError：字段引用的模型的查找失败

1 个答案: