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本文由laravel教程欄目給大家介紹，主要內(nèi)容是“laravel如何使用migrations”，希望對需要的朋友有所幫助！

Laravel：使用Migrations

1、首先利用artisan創(chuàng)建一個可遷移的數(shù)據(jù)表模板，該命令運(yùn)行后會在database/migrations目錄下生成一個文件

php artisan make:migration create_fees_count_table --create=fees_count

2、生成的文件包含up和down兩個方法，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比較簡單，就是刪除表，當(dāng)然里面還可以有一些其他邏輯

3、up中支持的數(shù)據(jù)表列類型，做個備注，暫時不做翻譯

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.

4、表創(chuàng)建完成后，直接執(zhí)行，由于我之前很多表創(chuàng)建并沒有使用php artisan ?migrate，所以直接運(yùn)行該命令導(dǎo)致提示部分表存在，所以，我把這個文件轉(zhuǎn)移到database下tmp目錄下，命令上添加 –path ‘database/tmp’，再次運(yùn)行成功