in this example, we will create "posts" and "comments" table. in comments table we will add two foreign key constraint one with posts and another with users table. so let's simple create migration and let's see: Example 1: Create Migration Command: php artisan make:migration create_posts...
问题:laravel迁移外键约束的格式不正确 答案:在Laravel中,迁移外键约束的格式需要按照一定的规则来定义。如果出现外键约束格式不正确的问题,可能是以下几个方面的原因: 1. 外键字段类型...
ThisLaravelpackage provides a base migration for you to extend to easily create all your foreign keys. If you ever ran into the problem where you had to reorganize all your migrations due to failing foreign key constraints, this is the package for you!
迁移文件位于 database/migrations 目录下，迁移类存在 up 和 down 两个方法，分别对应创建与撤销。php artisan make:migration create_users_table --create=users #创建表php artisan make:migration add_votes_to_users_table --table=users #修改表php artisan migrate #执行迁移 --force强制执行php art...
创建Post 表字段,修改 database\migrations\日期_create_posts_table.php 文件 代码语言:javascript 代码运行次数:0 运行 AI代码解释 <?php use Illuminate\Database\Migrations\Migration; use Illuminate\Database\Schema\Blueprint; use Illuminate\Support\Facades\Schema; class CreatePostsTable extends Migration { ...
For example, imagine you have a migration that creates avotescolumn with theunsigned,default, andcommentattributes: Schema::create('users', function (Blueprint $table) { $table->integer('votes')->unsigned()->default(1)->comment('The vote count');}); ...
注意make:migration有1个必写的参数name, 3个可选的选项 --create,--tabel,--path--path是指定迁移文件生成的位置,默认是放在 应用根目录/database/migrations下面,如果指定了--path=x/y/x,就会在 应用根目录/x/y/z下面生成迁移文件,注意的是得保证该目录已存在,否则会报错 新建表时,name的写法可以是 ...
1phpartisanmake:migrationcreate_users_table The new migration will be placed in yourdatabase/migrationsdirectory. Each migration file name contains a timestamp which allows Laravel to determine the order of the migrations. The--tableand--createoptions may also be used to indicate the name of the...
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-...
Model 9.x 基础使用 // 定义一个 Eloquent 模型classUserextendsModel{}// 生成一个 Eloquent 模型php artisan make:model User// 生成一个 Eloquent 模型的时候,顺便生成迁移文件php artisan make:model User--migrationOR-m// 生成一个 Eloquent 模型的时候,顺便生成迁移文件、控制器(或资源控制器)php artisan...