I'm trying to validate request with [class-validator](https://github.com/typestack/class-validator) if it's array.

inputs comes from query param with `/api/items?someTypes=this`

my request dto looks like this.

```
    (...)
    @IsArray()
    @IsEnum(SOMETHING, {each: true})
    readonly someTypes: keyof typeof SOMETHING[];
    (...)

```

when I give only one item, @IsArray gives validation error, saying it is not an array.

I want to make it array too when one item comes from query param, but I don't know how.

I know using `/api/items?someTypes[]=this` will pass validation.

but I want to know if there is another way to solve this.