class.ilLearningSequenceRectifyPostConditionsTableDBUpdateSteps.php

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<?php
 
class ilLearningSequenceRectifyPostConditionsTableDBUpdateSteps implements \ilDatabaseUpdateSteps
{
    private const TABLE_NAME = "post_conditions";
 
    protected \ilDBInterface $db;
 
    public function prepare(\ilDBInterface $db): void
    {
        $this->db = $db;
    }
 
    public function step_1(): void
    {
        $this->db->dropPrimaryKey(self::TABLE_NAME);
        $this->db->addPrimaryKey(self::TABLE_NAME, ["ref_id"]);
    }
 
    public function step_2(): void
    {
        $this->db->modifyTableColumn(
            self::TABLE_NAME,
            "value",
            [
                "type" => "text",
                "length" => 255,
                "notnull" => false
            ]
        );
    }
 
    public function step_3(): void
    {
        $this->db->manipulate(
            "UPDATE " . self::TABLE_NAME . " SET value = NULL WHERE value = 0"
        );
    }
}