站長(zhǎng)資訊網(wǎng)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(duì)需要的朋友有所幫助！
Laravel：使用Migrations
1、首先利用artisan創(chuàng)建一個(gè)可遷移的數(shù)據(jù)表模板，該命令運(yùn)行后會(huì)在database/migrations目錄下生成一個(gè)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(gè)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(jiǎn)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(gè)備注，暫時(shí)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(méi)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(gè)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
php artisan migrate
5、數(shù)據(jù)庫(kù)中觀察即發(fā)現(xiàn)表已創(chuàng)建！
