五步搞定Laravel Migrations的使用

时间：2022-03-03 11:48

本文由Laravel教程栏目给大家介绍，主要内容是“Laravel如何使用Migrations”，希望对需要的朋友有所帮助！

Laravel：使用Migrations

1、首先利用artisan创建一个可迁移的数据表模板，该命令运行后会在database/migrations目录下生成一个文件

php artisan make:migration create_fees_count_table --create=fees_count

2、生成的文件包含up和down两个方法，其中up中是包含了添加表，添加列，添加索引等等一切的描述，down比较简单，就是删除表，当然里面还可以有一些其他逻辑

3、up中支持的数据表列类型，做个备注，暂时不做翻译

Command	Description
$table->bigIncrements('id');	Incrementing ID (primary key) using a "UNSIGNED BIG INTEGER" equivalent.
$table->bigInteger('votes');	BIGINT equivalent for the database.
$table->binary('data');	BLOB equivalent for the database.
$table->boolean('confirmed');	BOOLEAN equivalent for the database.
$table->char('name', 4);	CHAR equivalent with a length.
$table->date('created_at');	DATE equivalent for the database.
$table->dateTime('created_at');	DATETIME equivalent for the database.
$table->decimal('amount', 5, 2);	DECIMAL equivalent with a precision and scale.
$table->double('column', 15, 8);	DOUBLE equivalent with precision, 15 digits in total and 8 after the decimal point.
$table->enum('choices', ['foo', 'bar']);	ENUM equivalent for the database.
$table->float('amount');	FLOAT equivalent for the database.
$table->increments('id');	Incrementing ID (primary key) using a "UNSIGNED INTEGER" equivalent.
$table->integer('votes');	INTEGER equivalent for the database.
$table->json('options');	JSON equivalent for the database.
$table->jsonb('options');	JSONB equivalent for the database.
$table->longText('description');	LONGTEXT equivalent for the database.
$table->mediumInteger('numbers');	MEDIUMINT equivalent for the database.
$table->mediumText('description');	MEDIUMTEXT equivalent for the database.
$table->morphs('taggable');	Adds INTEGER taggable_id and STRING taggable_type.
$table->nullableTimestamps();	Same as timestamps(), except allows NULLs.
$table->rememberToken();	Adds remember_token as VARCHAR(100) NULL.
$table->smallInteger('votes');	SMALLINT equivalent for the database.
$table->softDeletes();	Adds deleted_at column for soft deletes.
$table->string('email');	VARCHAR equivalent column.
$table->string('name', 100);	VARCHAR equivalent with a length.
$table->text('description');	TEXT equivalent for the database.
$table->time('sunrise');	TIME equivalent for the database.
$table->tinyInteger('numbers');	TINYINT equivalent for the database.
$table->timestamp('added_on');	TIMESTAMP equivalent for the database.
$table->timestamps();	Adds created_at and updated_at columns.
$table->uuid('id');	UUID equivalent for the database.