Django:How 是否在迁移之前将初始数据放入数据库？

Question

从现有代码添加模型。我想在迁移我添加的模型时输入初始数据。

python3 -m pip install sqlparse

python3 manage.py makeemigations sbimage

//我已经编辑了生成的0002文件。

python3 manage.py Migrate image 0002

//确认正常运行。

python3 manage.py sqlmigrate thimage 0002

//确认正常运行。

但是数据库校验的时候数据没有进入table

from django.db import migrations, models

class Migration(migrations.Migration):
    dependencies = [
        ('sbimage', '0001_initial'),
    ]

    operations = [
        migrations.CreateModel(
            name='AuthNumberR',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('auth_number_r', models.CharField(max_length=64)),
            ],
        ),
        migrations.RunSQL("INSERT INTO AuthNumberR (id, auth_number_r) VALUES (2, 'c');"),
    ]

Answer 1

您可以使用 django fixtures 向您的数据库提供初始数据。这对你的情况很有用。

Answer 2

我认为你不应该使用 naked SQL 查询，而是尝试使用类似这样的东西

from django.db import migrations

def combine_names(apps, schema_editor):
    # We can't import the Person model directly as it may be a newer
    # version than this migration expects. We use the historical version.
    Person = apps.get_model('yourappname', 'Person')
    for person in Person.objects.all():
        person.name = '%s %s' % (person.first_name, person.last_name)
        person.save()

class Migration(migrations.Migration):

    dependencies = [
        ('yourappname', '0001_initial'),
    ]

    operations = [
        migrations.RunPython(combine_names),
    ]

参考：https://docs.djangoproject.com/en/2.2/topics/migrations/#data-migrations

Django:How 是否在迁移之前将初始数据放入数据库？

Django:How do I put the initial data into the database before Migrate?

python

django

database

migrate