codeigniter - 将默认值(当前日期时间)设置为表列 - CodeIgniter 3 迁移

Question

我有这个迁移:

public function up(){
    $this->dbforge->add_field([
        'id'=>['type'=>'int', 'unique'=>true, 'unsigned'=>true,'auto_increment'=>true],
        'email'=>['type'=>'varchar', 'constraint'=>200, 'null'=>true],
        'password'=>['type'=>'varchar', 'constraint'=>250],
        'created_at'=>['type'=>'datetime', 'default' => 'CURRENT_TIMESTAMP'],
    ]);
    $this->dbforge->add_key('id', TRUE);
    $this->dbforge->create_table('users', TRUE);
}

我正在尝试设置带有列 created_at 的表格默认值 - 当前日期时间。
我正在使用 'default' => 'CURRENT_TIMESTAMP' ，但我收到此错误:

Invalid default value for 'created_at' .... NOT NULL, created_at datetime NOT NULL DEFAULT 'CURRENT_TIMESTAMP',

我正在使用 CodeIgniter 3与 MySQL .

Answer 1

这对我有用，并且在文档中有效

Passing strings as fields If you know exactly how you want a field to be created, you can pass the string into the field definitions with add_field()

$this->dbforge->add_field("label varchar(100) NOT NULL DEFAULT 'default label'");

Note: Passing raw strings as fields cannot be followed by add_key() calls on those fields.

`$this->dbforge->add_field(
  array(
    'nombre' => 
      array(
        'type' => 'VARCHAR',
        'constraint' => '150',
      ),
    'paterno' => 
      array(
        'type' => 'VARCHAR',
        'constraint' => '80',
      ),
    'materno' => 
      array(
        'type' => 'VARCHAR',
        'constraint' => '80',
      ),
    'correo' => 
      array(
        'type' => 'varchar',
        'constraint' => '150',
        'unique'=> TRUE,
    ),
    'username' => 
      array(
        'type' => 'varchar',
        'constraint' => '80',
    ),
    'genero' => 
      array(
        'type' => 'varchar',
        'constraint' => '30',
    ),
    'pass' => 
      array(
        'type' => 'varchar',
        'constraint' => '255',
    ),
    'direccion' => 
      array(
        'type' => 'varchar',
        'constraint' => '200',
    ),
    'telefono' => 
      array(
        'type' => 'varchar',
        'constraint' => '30',
    ),
    'celular' => 
      array(
        'type' => 'varchar',
        'constraint' => '30',
    ),
    'created_at datetime default current_timestamp',
    'updated_at datetime default current_timestamp on update current_timestamp',
    'status' => 
      array(
        'type' => 'tinyint',
        'constraint' => '1',
    ),
  )
);`