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
数据库迁移也是laravel强大的功能之一,但是一直也只是在文档上看过,实际项目中还没有使用过,因为需要迁移的场景比较少,而且需要迁移的时候,直接mysqldump也很方便,好像不是很有必要。但是最近遇到一个问题,开发不能登机器操作数据库了,这就比较难受了,一般发布新版本,都会有一些数据库变更的操作,常见的有:加表,加...
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COLUMN不存在的错误。 总之,这个问题并没有十分完美的解决方案,堪称无解深坑,尤其要注意rollback操作不要乱做,不要为了弥补一个坑,给自己挖了更大的一个坑。
} The up() method runs when the migration is executed and creates the user's table which holds five columns. The first is an auto-incrementing ID column, followed by VARCHAR columns for a username, email, and password. The first parameter to string() is the name of the column (e.g....
* * @return void */ public function up() { // do the following steps in order: // 1- add a new column with the desired data type to the table // 2- fill the new column with the appropriate data // 3- delete the old column // 4- rename the new column to match name of ...
Laravel migration provides way to add column name and datatype. But if you need to change column datatype then you have to installdoctrine/dbalpackage to change datatype. In this example i will show you two ways to change datatype text to longtext in laravel migration. ...
Example 1: Laravel Migration Add Unique Constraint Here, we will createproductstable with addUnique Constraintto code column. Create new migration using following command: php artisan make:migration create_products_table Now, You can update it as like the bellow: ...
laravel由浅入深 关注博客注册登录 上面要注意默认值为CURRENT_TIMESTAMP的写法,如果不这样写,系统为了安全会加上单引号,另外该msyql常量只在mysql版本高于5.6才有 6.7 迁移和回滚 vagrant@homestead:~/abcde/study/myblog$ php artisan migrate --database=mysql2 --path=database/migrations2 vagrant@homestead:~/...
laravel migration 修改字段 php artisan make:migration ...,phpartisanmake:migrationalter_sources_description--table=life_car_sourcesphpartisanmigratephpartisanmigrate:rollback--step=1#回滚变更<?phpuse
public function down() { if (Schema::hasColumn('users', 'phone')) { Schema::table('users', function (Blueprint $table) { $table->dropColumn('phone'); }); } } Similarly you can add if-statements like this in other parts of your migrations, it just depends on your level of "...