Django 1.7长迁移永远不会结束 [英] Django 1.7 long migrations never ends

问题描述

我使用django 1.7与MySQL数据库。我正在尝试运行一个从500K行的表中删除列的迁移。当运行迁移时，它挂起了无限的时间。

当手动连接到数据库时，我可以看到迁移有效（列已被删除）。但迁移未写入 django_migrations 表。当查看DB性能图表时，我看到迁移所产生的尖峰，然后恢复到正常水平。

挂起的原因可能是什么？我是否缺少某些东西？

更新：这里是迁移代码

  class Migration（migrations.Migration）：
 operations = [
 migrations.RemoveField（
 model_name ='table_name'，
 name ='column_name' ，
），
] 
  

解决方案

https://groups.google。 com / forum /＃！forum / django-users

或打开一张票： https://code.djangoproject.com/query

Django 1.7是刚刚发布，我知道 migrations 是这个版本中最复杂的变化之一。

对不起，我马上不能帮你。

干杯

I'm using django 1.7 with a MySQL DB. I'm trying to run a migration that deletes a column from a table with 500K rows. When running the migration it hangs for an infinite amount of time.

When manually connecting to the DB, I can see that the migration worked (the column has been deleted). However the migration was not written to django_migrations table. When looking at DB performance graphs, I see the spike made by the migration, and then back to normal levels.

What might be the cause for the hang? Am I missing something?

Update: here is the migration code

class Migration(migrations.Migration):
    operations = [
        migrations.RemoveField(
            model_name='table_name',
            name='column_name',
        ),
    ]

解决方案

this seems not to be the desired behavior. Please point this to the Django-users mailing list: https://groups.google.com/forum/#!forum/django-users

Or open a ticket at: https://code.djangoproject.com/query

Django 1.7 is freshly released and I know that the migrations are one of the most complicated changes they've made in this release.

Sorry that I can't help you immediately.

Cheers

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