when I run php yii migrat shell throw error “table already exists”

[curder]

when i run php yii migrate --migrationPath=@vendor/yii2mod/yii2-comments/migrations,throw some error, Error Info :

rename table {{%Comment}} to {{%comment}} ...Exception 'yii\db\Exception' with message 'SQLSTATE[42S01]: Base table or view already exists: 1050 Table 'blog_comment' already exists
The SQL being executed was: RENAME TABLE `blog_Comment` TO `blog_comment`'

My Developer environment is MAMP,and the MySQL version is 5.5.42。

so I modified the my.conf file and restart mysqld server.

[mysqld]
lower_case_table_names = 0

the bug is aways ready exists,please tell me some idea to solve it.

[Ihor Chepurnyi]

Hi, blog_ is your prefix for all tables?

[curder]

yes, I defined it in my config file,tablePrefix => blog_ for my database connect params, and I am run php yii migrate/create init_comment_table to created a new migration for this problem. like this

<?php

use yii\db\Migration;

class m170313_042335_init_comment_table extends Migration
{
  const TABLE_NAME = '{{%comment}}';

    public function up()
    {
        echo "m170313_042335_init_comment_table cannot be reverted.\n";
        $tableOptions = null;

        if ($this->db->driverName === 'mysql') {
            $tableOptions = 'CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE=InnoDB';
        }
        $this->createTable(self::TABLE_NAME, [
            'id' => $this->primaryKey(),
            'entity' => $this->char(10)->notNull(),
            'entityId' => $this->integer()->notNull(),
            'content' => $this->text()->notNull(),
            'parentId' => $this->integer()->null(),
            'level' => $this->smallInteger()->notNull()->defaultValue(1),
            'createdBy' => $this->integer()->notNull(),
            'updatedBy' => $this->integer()->notNull(),
            'relatedTo' => $this->string(500)->notNull(),
            'url' => $this->text(),
            'status' => $this->smallInteger()->notNull()->defaultValue(1),
            'createdAt' => $this->integer()->notNull(),
            'updatedAt' => $this->integer()->notNull(),
        ], $tableOptions);
        $this->createIndex('idx-comment-entity', self::TABLE_NAME, 'entity');
        $this->createIndex('idx-comment-status', self::TABLE_NAME, 'status');
    }

    public function down()
    {
        echo "m170313_042335_init_comment_table cannot be reverted.\n";
        $this->dropTable(self::TABLE_NAME);
    }
}

and solved it, thank you for your answer! Happy Hacking :laugh

[Ihor Chepurnyi]

Thanks :)