laravel运用Migrate进行建表

建立一个migrate

php artisan make:migration create_table_anke 

编写migrate建表

Schema::create('anke', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name', 20);
    $table->timestamps();
});

表生成器包含一系列的字段类型用于构建表：

命令	描述
$table->bigIncrements('id');	Incrementing ID using a "big integer" equivalent.
$table->bigInteger('votes');	BIGINT equivalent to the table
$table->binary('data');	BLOB equivalent to the table
$table->boolean('confirmed');	BOOLEAN equivalent to the table
$table->date('created_at');	DATE equivalent to the table
$table->dateTime('created_at');	DATETIME equivalent to the table
$table->decimal('amount', 5, 2);	DECIMAL equivalent with a precision and scale
$table->double('column', 15, 8);	DOUBLE equivalent with precision
$table->enum('choices', array('foo', 'bar'));	ENUM equivalent to the table
$table->float('amount');	FLOAT equivalent to the table
$table->increments('id');	Incrementing ID to the table (primary key).
$table->integer('votes');	INTEGER equivalent to the table
$table->longText('description');	LONGTEXT equivalent to the table
$table->mediumText('description');	MEDIUMTEXT equivalent to the table
$table->morphs('taggable');	Adds INTEGER taggable_id and STRING taggable_type
$table->smallInteger('votes');	SMALLINT equivalent to the table
$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 to the table
$table->time('sunrise');	TIME equivalent to the table
$table->timestamp('added_on');	TIMESTAMP equivalent to the table
$table->timestamps();	Adds created_at and updated_at columns
->nullable()	Designate that the column allows NULL values
->default($value)	Declare a default value for a column
->unsigned()	Set INTEGER to UNSIGNED

更多请看https://blog.csdn.net/kjw001122/article/details/79908419

---

我们在以上运用 $table->timestamps(); 生成添加时间及修改时间，但是这个时间自Laravel 5.3后时间默认为null  ，在操作时需要自己手动添加时间

如果想要在migrate中设置时间为自动更新 需要进行已下操作
use Illuminate\Support\Facades\DB;
$table->timestamp('created_at')->default(DB::raw('CURRENT_TIMESTAMP'));
$table->timestamp('updated_at')->default(DB::raw('CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP'));