DataAnnotations validation in Web API, how to display in Swagger?

Question

I'm developing an API using ASP.NET 4.6 and Web API 2. So far, I've been using DTO's and DataAnnotations, which look like the following:

public class CustomerDTO
{
    ...
    [Required]
    public string Name { get; set; }

    [StringLength(20, ErrorMessageResourceName = "Error", ErrorMessageResourceType = typeof(Resources), MinimumLength = 6)]
    public string DocumentNumber { get; set; }
    ...
}

And I'd use my DTO's like this:

[ResponseType(typeof(CustomerDTO))]
public IHttpActionResult PostCustomer(CustomerDTO customer)
{
    if (!ModelState.IsValid)
    {
        return BadRequest(ModelState);
    }
    ...
}

Now I've been asked to release a first version of the API's documentation. After doing some research I discovered Swagger, so I got Swashbuckle from NuGet and started playing with it. Amazing, by the way.

But I do need the users of my API to know which is the max length for certain parameters, which ones are required, and so on. How do I get Swagger to show this information?

Answer 1

see here the answer

[StringLength(10, MinimumLength = 5)] public String Name {get;set;}