Magento – How do auto add datetime in InstallSchema magento2

magento2magento2-dev-beta

in InstallSchema 

        ->addColumn(
            'created_at',
            \Magento\Framework\DB\Ddl\Table::TYPE_TIMESTAMP,
            [],
            'Creation Time'
        )
        ->addColumn(
            'updated_at',
            \Magento\Framework\DB\Ddl\Table::TYPE_TIMESTAMP,
            [],
            'Update Time'
        )

so how do updated_at, create_at auto add datetime when execute action?

Best Answer

Answer provided by @Smartie should work, but you can also achieve this on database level like Magento 2 does for customer entity:

    )->addColumn(
        'created_at',
        \Magento\Framework\DB\Ddl\Table::TYPE_TIMESTAMP,
        null,
        ['nullable' => false, 'default' => \Magento\Framework\DB\Ddl\Table::TIMESTAMP_INIT],
        'Created At'
    )->addColumn(
        'updated_at',
        \Magento\Framework\DB\Ddl\Table::TYPE_TIMESTAMP,
        null,
        ['nullable' => false, 'default' => \Magento\Framework\DB\Ddl\Table::TIMESTAMP_INIT_UPDATE],
        'Updated At'

This will set following columns:

`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT 'Created At',
`updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT 'Updated At',
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