phpartisan make:migration create_table_test –table=test_a 修改表 Schema::table(‘test’, function (Blueprint $table) { $table->dropColumn([‘data’]); $table->renameColumn(‘tttt’,’test’); $table->addColumn(‘
2)修改已创建的数据表字段(make:migration add) 想要修改已创建的数据表,不能直接改原来的 migrate 文件,要新建一个迁移文件,命令如下: php artisan make:migration add_description_to_articles_table --table=articles php artisan make:migration change_description_on_articles_table --table=articles PS:其实migr...
migration 简介Introduction Migrations are like version control for your database, allowing your team to easily modify and share the application's database schema. Migrations are typically paired with Laravel's schema builder to easily build your application's database schema. If you have ever had ...
php artisan make:migration add_votes_to_users_table--table=users 如果你想为生成的迁移指定一个自定义输出路径,则可以在运行make:migration命令时添加--path选项。给定的路径必须是相对于应用程序的基本路径。 迁移结构 迁移类通常会包含两个方法:up和down。up方法可为数据库添加新的数据表、字段或索引,而do...
php artisan make:migration create_users_table--create=users php artisan make:migration add_votes_to_users_table--table=users 如果你想为生成的迁移指定一个自定义输出路径,则可以在运行make:migration命令时添加--path选项。提供的路径必须是相对于应用程序的基本路径。
To change therolecolumn in thefund_userstable to anullable string with a maximum length of 50 characters, create a new migration and add the following within theup()method: Schema::table('fund_users',function(Blueprint$table){$table->string('role',50)->nullable()->change(); ...
1php artisan make:migration create_flights_tableLaravel will use the name of the migration to attempt to guess the name of the table and whether or not the migration will be creating a new table. If Laravel is able to determine the table name from the migration name, Laravel will pre-...
还有一种办法是,把自己的建表、改表操作都放在一个try catch结构中,一旦出现错误,直接调用migration文件中的down函数,把所做的操作回滚掉。不过这个需要注意up和down的兼容性。例如up中有ADD COLUMN操作,而down中有DROP COLUMN操作。在ADD COLLUMN操作执行之前就出错,直接取执行down函数中的DROP COLUMN,也会有可能报...
A migration class contains two methods: up and down. The up method is used to add new tables, columns, or indexes to your database, while the down method should reverse the operations performed by the up method.Within both of these methods, you may use the Laravel schema builder to ...
php artisan make:migration add_votes_to_users_table --table=users php artisan make:migration create_users_table --create=users如果你想为生成的迁移指定一个自定义输出路径,则可以在运行 make:migration 命令时使用 --path 选项。提供的路径必须是相对于应用程序的基本路径。