如何使用 Laravel 迁移将字符串列类型转换为 integer？

Question

I am trying to alter the column datatype using Laravel migration. But I am facing following error. Please help me out.

Schema::table('files', function(Blueprint $table) {
    $table->integer('app_id')->change();
    $table->index(['app_id', 'filename']);
});

SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'CHARACTER SET utf8 DEFAULT 0 NOT NULL COLLATE utf8_unicode_ci ' at line 1 (SQL: ALTER TABLE files CHANGE app_id app_id INT CHARACTER SET utf8 DEFAULT 0 NOT NULL COLLATE utf8_unicode_ci )

Answer 1

As a alternative solution to https://github.com/doctrine/dbal/issues/3714 that is downgrading the doctrine/dbal package u can do:

Schema::table('member_section', function (Blueprint $table) {
    $table->bigInteger('type')->charset(null)->collation(null)->change();
});

Answer 2

Your issue is most likely caused by a bug in the most recent version of the doctrine/dbal package. The issue was introduced with v2.10.0 .

You can always downgrade the package in your composer.json to v2.9.3 it should work just fine.

See the offical issue here: https://github.com/doctrine/dbal/issues/3714