New MigrationsPPT
IntroductionNewMigrations is a PHP library that provides a simple and efficie...
IntroductionNewMigrations is a PHP library that provides a simple and efficient way to handle database migrations. It allows you to version control your database schema and perform migrations without the need for writing a custom solution. NewMigrations is built on top of Laravel's database migration system, providing a seamless integration with Laravel projects.FeaturesSimple UsageNewMigrations provides a clean and simple syntax for defining migrations, making it easy to maintain and update your database schemaLaravel IntegrationBuilt on top of Laravel's database migration system, NewMigrations seamlessly integrates with Laravel projects, allowing you to use Laravel's database features and helpers within your migrationsDatabase SupportSupports a wide range of database systems, including MySQL, PostgreSQL, SQLite, and moreSchema BuilderNewMigrations includes a schema builder that allows you to define your database table structure using an intuitive syntaxRollback and ForwardWith NewMigrations, you can easily rollback (undo) migrations or move forward to specific migrations with easeCustom MigrationsNewMigrations allows you to create custom migrations by extending the core functionality or using the provided hooks to perform additional tasks during the migration processFlexible ConfigurationConfigure various options, such as the migration path, the database connection to use, and more, to suit your project's needsInstallation and SetupTo install NewMigrations, you can use Composer by running the following command in your terminal:After installation, you need to generate the initial migrations using the new:migration Artisan command:This command will generate a new migration file in the database/migrations directory of your Laravel project. You can customize the migration file according to your needs.To run the migrations, use the migrate Artisan command:This command will execute all the available migrations in the database/migrations directory.Defining MigrationsMigrations are PHP classes that define changes to the database schema. Each migration has a unique name and belongs to a specific version. NewMigrations follows the same syntax and structure as Laravel's built-in migrations. Here's an example of a basic migration:In this example, we define a migration to create a users table. The up method is responsible for executing the necessary changes when migrating forward, while the down method is responsible for reversing the changes when rolling back. In this case, we define a primary key id using increments, a name column using string, an email column using string and making it unique, created_at and updated_at columns using timestamp with default values. The down method simply drops the users table if it exists.执行 Migrations执行迁移有几种方法。一种是通过命令行工具 php artisan,另一种是直接在你的代码中调用 Migrator 类。通过命令行执行迁移Laravel 提供了一个命令行工具来管理迁移。你可以使用以下命令来执行迁移::此命令将运行所有可用的迁移:此命令将回滚并重新运行所有迁移:此命令将回滚最后一个迁移:此命令将显示迁移的状态你还可以使用 php artisan migrate:install 命令来安装迁移所需的表。通过代码执行迁移你也可以在你的代码中直接使用 Laravel 的 Migrator 类来执行迁移。例如:在这个例子中,我们创建了一个新的 Migrator 实例,并使用 migrate 方法来运行指定目录中的所有迁移文件。创建和运行自定义迁移除了使用 Laravel 提供的内置迁移,你还可以创建自定义迁移。这可以通过扩展 Laravel 的 Migration 类来实现。以下是一个创建自定义迁移的示例:在这个例子中,我们创建了一个名为 CustomMigration 的新类,并覆盖了 up 方法来定义迁移的逻辑。在这个例子中,我们创建了一个名为 custom_table 的新表,并定义了几个字段。然后,你可以像这样运行自定义迁移: