PHP

laravel migration add unique column

Schema::table('tableName', function($table)
{
    $table->string('column-name')->unique(); //notice the parenthesis I added
});

unique laravel migration

use IlluminateDatabaseSchemaBlueprint;
use IlluminateSupportFacadesSchema;

Schema::table('users', function (Blueprint $table) {
    $table->string('email')->unique();
});

laravel migration alter column unique

$table->dropUnique('users_email_unique');