Скачать или смотреть How to Configure Doctrine to Ignore Specific Tables in Migration Generation

Learn how to instruct Doctrine in Symfony to skip specific tables like `cache_items` during migration generation, ensuring clean and efficient migrations.
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Understanding the Challenge with Doctrine Migrations

When working with Symfony's Doctrine ORM, you may encounter situations where certain tables should not be included in migration generation. A common scenario is when Doctrine tries to manage tables that are either generated automatically or are not relevant for migrations. One specific case involves the cache_items table, automatically created by the MySQL cache adapter in Symfony 6.4 with Doctrine ORM 2.17.

In default configurations, running the migration command:

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results in unnecessary entries for the cache_items table in both the up() and down() methods of the new migration file. This can clutter your migrations and lead to complications in database management. So, how can you prevent Doctrine from adding this default table to your migrations?

Solution: Configuring Doctrine to Ignore Specific Tables

Fortunately, there is a straightforward method to configure Doctrine to ignore specific tables during migration generation. The key lies in modifying your doctrine.yaml configuration file. Here’s how you can achieve that step by step.

Step 1: Locate the Configuration File

Navigate to your Symfony project directory.

Find the config/packages/doctrine.yaml file. This file contains database connection and schema information for Doctrine.

Step 2: Update the doctrine.yaml Configuration

You’ll need to add a schema filter to your configuration. This filter will instruct Doctrine to skip the cache_items table. Open the doctrine.yaml and add the following lines:

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Explanation of the Schema Filter

~^(?!cache_items)$~ is a regular expression that tells Doctrine which tables to ignore. Here’s a breakdown of the expression:

^ asserts the start of a string.

(?!cache_items) is a negative lookahead that specifies that if the table is named cache_items, it doesn’t match.

$ asserts the end of a string.

By applying this schema filter in your configuration, Doctrine will recognize that it should not consider the cache_items table during migration generation.

Step 3: Generate Your Migrations

Now that you have updated your configuration, you can run the migration command without the cache_items table appearing in your migration files:

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This command will now result in clean migration outputs without any mention of the cache_items table, simplifying your migration process and avoiding confusion.

Conclusion

Configuring Doctrine to ignore specific tables in migration generation is a vital step in maintaining a clean and efficient migration strategy. By following the steps outlined in this guide, you can effectively prevent unwanted tables like cache_items from cluttering your migrations. This not only streamlines your migration process but also enhances the overall manageability of your database schema as your application grows.

Make sure to test your migrations to ensure everything is working as expected, and enjoy a cleaner codebase!