Migrate makemigrations apps. When running Django migrations, which command should you run: 'makemigrations' or 'migrate'? Here is a simple how-to manual makemigrations 负责将您的模型更改打包到单独的迁移文件中 - 类似于提交 - 而 migrate 负责将这些更改应用于您的数据库。 每个应用程序的迁移文件都位于该应用程序内的“迁移”目录中，旨在提交到其代码库并作为其代码库的一部分进行分发。 and you can create a new migration using the makemigrations command: python manage. They’re designed to be mostly automatic, but you’ll need to know when to make migrations, when to run them, and the common problems you might run into. python manage. For example: $ python manage. A migration file contains Python code that describes changes to the database schema, such as creating new tables, adding fields, or altering existing fields. py makemigrations. makemigrations - create new migrations based on changes made to models. showmigrations - lists projects migrations and their status. . Refrence: Migrations - Django Docs May 21, 2025 · The makemigrations command in Django is used to generate migration files based on changes made to your models. py makemigrations Code language: CSS (css) The makemigrations command scans the models. py migrate. Django offers a few commands that make working with migrations much easier. py makemigrations --name increase_max_lengthswill create a migration file: We would like to show you a description here but the site won’t allow us. Use the migrate command to apply changes from models to the database. Migrations are Django’s way of propagating changes you make to your models (adding a field, deleting a model, etc. These commands are: makemigrations; migrate; sqlmigrate; showmigrations run python manage. Feb 21, 2024 · Mastering Django migrations is a crucial skill for managing your database schema changes over time. It’ll show the following output: Sep 20, 2020 · 注意：[]migration文件未通过的，可以通过删除migrations下对应名称文件撤销这次更新。 2. python3 manage. In this blog breakdown of the key concepts, issues, and commands involved in Django migrations. py 文件的开头导入相应的 迁移 ，并使用 May 10, 2017 · Now you can do makemigrations and migrate appname --fake and you will get things back in sync. 执行完makemigrations只是生成了对应的sql语句，还并没真正将改动迁移到数据库中。需要执行migrate才能将改动迁移到数据库，完成建表、修改字段等操作。 添加可空字段，不含默认值，并运行 makemigrations 命令。这应该会产生一个带有 AddField 操作的迁移。 将默认值添加到你的字段中，然后运行:djadmin:makemigrations 命令。这应该会生成一个带有 AlterField 操作的迁移。 Oct 22, 2020 · Django comes with several migration commands to interact with the database schema. Then uncomment your new code and run 'makemigrations' then migrate as normal and the changes will be applied. If the changes are small (for example, adding a few fields), sometimes this is easiest. Django stores specific migration-related information in the migrations directory inside each app. Feb 12, 2024 · この記事は、Djangoのマイグレーションについてより理解したいと考えている方々に向けたものです。 Djangoがマイグレーションをどのように追跡し、適用するか、そして開発者が新しいマイグレーションを作成する際にDjangoがどのようにモデルの変更を検出するかについて解説しています。 现在你能像往常一样用 migrate 应用迁移了。. ) into your database schema. It doesn't affect the database but prepares the instructions to do so. [makemigrations] マイグレーションファイルを作成する [migrate] マイグレーションを実行する [showmigrations]の実行状況を確認する [sqlmigrate] マイグレーションの実行SQLを確認する [migrate app_name migration_name] ロールバックする [migrate zero] 完全に初期化する Aug 15, 2024 · Schema Migrations（模式迁移）：这些是由Django的makemigrations和migrate命令管理的迁移，它们负责更新数据库模式（即表结构）以匹配模型的当前状态。 如果你的数据 迁移 依赖于某个模式 迁移 ，你需要在0002_data_migration . Makemigrations: Creates Migration files based on the changes in your models. Use the makemigrations command to make migrations based on the changes that you made to the models. py migrate to apply the change to your data; add the new migration file to the repository when you check in the changes. py文件中。 当写好之后，需要在setting文件中配置 引入'api. Sep 20, 2020 · 本文详细介绍了Django项目中数据库模型变更的过程，包括如何通过makemigrations生成DDL语句，以及如何通过migrate命令将变更应用到数据库中。 此外，还讲解了如何查看和管理这些迁移文件。 摘要生成于 C知道 ，由 DeepSeek-R1 满血版支持， 前往体验 > 开始接触 Django 编程，用来写后端代码。 后端必然需要和数据库打交道，在Django中对于数据库模型一般写在models. py file, detects changes, and makes corresponding migrations. 注意，若你允许运行迁移时创建对象可能会造成竞争。 AddField 后和 RunPython 前创建的对象保留原先重写的 uuid 值。 Dec 1, 2021 · Migrations can be generated automatically or written manually if more control is needed. Extra tip: Applying a name to the migration will make it easier to see what each migration was for. sqlmigrate - displays SQL statements for a given migration. ApiConfig' 。 然后在运行之前需要做两件事： 1. Use the sqlmigrate command to view the generated SQL based on the model. Feb 6, 2023 · In this article, we will explore the differences between the two most common Django migration commands, makemigrations and migrate, when and how to use them, and any gotchas to watch out for. Migrate: Applies the migrations (described in the migration files) to the database, updating the database schema accordingly. migrate - used for applying and removing migrations. lboseog uwmwsv ylgp gdvi aisym djct szajc ixycquk sbb rqoz