Yii2 Migration to increase column length

Question

In Yii2 I wish to create a migration to change the character limit of a varchar column from 255 to 765.

Using $this->alterColumn('my_table', 'text_column', 'string');will make the column 255 as is. I'm thinking of using mysql to change the column to TEXT instead of Varchar, but is there a way to do this in Yii2?

Answer 1

Changing varchar length:

$this->alterColumn('my_table', 'text_column', $this->string(765));

Changing column type to text:

$this->alterColumn('my_table', 'text_column', $this->text());

You can find more examples in Migrations documentation.