Скачать или смотреть Best Way to Update Doctrine Migrations Tables

Discover efficient strategies for organizing and updating Doctrine migrations tables to streamline your application management.
---
This video is based on the question https://stackoverflow.com/q/73498284/ asked by the user 'HappyCoder' ( https://stackoverflow.com/u/2814241/ ) and on the answer https://stackoverflow.com/a/73557025/ provided by the user 'HappyCoder' ( https://stackoverflow.com/u/2814241/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Best way to update Doctrine migrations tables

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
The Best Way to Update Doctrine Migrations Tables

Managing migrations in Doctrine can often feel overwhelming, especially if your application serves multiple clients with unique configurations. Many developers encounter the challenge of maintaining a clean and efficient migration setup, and this post aims to guide you through the process of reorganizing migrations without causing disruptions to existing databases.

The Problem at Hand

Let’s break down the core issues that may arise in a situation like this:

Core Migrations Misplacement: It’s a common mistake to include core migrations within each customer folder, leading to inefficiency and a potential mess when deploying updates.

Client-Specific Migrations: Having multiple clients means that their custom migrations should ideally reside in their own folders while keeping core migrations stable and centralized.

My Objective

To resolve this, I want to achieve the following:

Centralize core structure migrations within the main codebase.

Create a single custom migration for client-specific data, which can be dropped into the client migration folder easily.

However, I need to ensure that this reorganization does not disrupt existing databases on current client applications.

Proposed Solutions

I outlined two potential solutions for this dilemma, which I’ll explain in more detail below.

Solution 1: Using Placeholder Migrations

Create Blank Migrations: Begin by adding blank migrations as placeholders for the actual migrations you plan to implement.

Commit and Deploy: Commit these placeholder migrations to the repository and deploy them across your environments.

Execute Migrations: When these migrations run, they’ll record as executed yet result in no changes to the database.

Update Migrations: Shift your attention to the blank migrations and insert your core migration logic. Clear out any unnecessary migration files from the previous setup.

Clean Up: Finally, remove any unwanted migration files and unnecessary migration records from the database.

Solution 2: Relocating Migrations

Change Migration Location: Alter the migration location in the database to a new designated area for your core migrations.

Refresh Migration Files: Delete the old migration files and add new blank migrations.

Commit Updated Files: As you commit, allow the migrations to run and record in the new table.

Implement New Code: Add your new migration code for implementation in future applications.

By following these steps, you ensure that new applications operate with up-to-date migration files while legacy applications benefit from the newly added migrations without directly affecting their previous state.

Steps for an Effective Reorganization

To successfully implement the changes without hindering your ongoing development, follow this well-defined process:

Update Migration Table Name: Adjust the migration table name in your configuration settings. Use the following code snippet:

[[See Video to Reveal this Text or Code Snippet]]

Delete Old Migrations: Clear out the old migration files and run the migrations:diff command to generate a new file encapsulating all updates.

Empty Migration File: Comment out the code in the newly created migration file to prepare it as an empty migration.

Build Process: Locally, remove the old migrations table, execute your build process, which will integrate the new migration into your adjusted structure.

Commit Changes: Commit your changes to the various environments (development, staging, live) and repeat the process as necessary.

Uncomment and Execute: Once all environments have migrated to the new versioning, uncomment the migration code, which will not be executed again since the migrations table already acknowledges them.