[DC-1053] Renaming a doctrine 'string' field may result in loss of data as the field's type changes. (MySQL)

Mon, 26 Mar 2012 20:52:02 +0000

Consider the following schema:

schema.yml

MyTable:
  columns:
    some_text:        string

Doctrine creates the table with:

CREATE TABLE `my_table` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `some_text` text,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

Now, the following migration should rename the field from some_text to just_text:

<?php
class Version1 extends Doctrine_Migration_Base
{
    public function up()
    {
        $this->renameColumn('my_table', 'some_text', 'just_text');
    }

    public function down()
    {
      $this->renameColumn('my_table', 'just_text', 'some_text');
    }
}

...however the field gets renamed and the type becomes VARCHAR(255), as the resulting SHOW CREATE TABLE my_table shows:

CREATE TABLE `my_table` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `a_varchar` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

Causes data in the column greater than 255 bytes to get truncated

Doctrine Project

[DC-1053] Renaming a doctrine 'string' field may result in loss of data as the field's type changes. (MySQL)