Swashbuckle.webapi: How to change a property from optional to required?

[styfle]

I'm trying to change a property to required because swagger docs shows it as optional.
ServiceStack shows an ApiMember(IsRequired=true) attribute however I cannot find it in the Swashbuckle package.

Is there an alternative?

[jreames9]

I did it by adding the DataAnnotations library to my class and then I added [Required] to the property. Swagger no longer shows it as optional.

[styfle]

@jreames9 Thanks, it worked!
The full namespace I used is System.ComponentModel.DataAnnotations.
Example for others:

using System;
using System.ComponentModel.DataAnnotations;

namespace WebApi1.Models
{
    public class User
    {
        [Required]
        public string Name { get; set; }
        // The age is optional
        public int Age { get; set; }
    }
}

[dgee2]

Is it possible to set this on a action parameter? At the moment even with the code above, the action parameter is shown as optional by Swashbuckle

[MelbourneDeveloper]

I have a similar issue. My definitions are created at runtime. They're not even types so I can't decorate them with an attribute.

[WhatFreshHellIsThis]

Sure would be nice if it defaulted to required with some mechanism to specify "Optional" so we don't have to decorate a bazillion properties.

[dgreene1]

This is why TypeScript's strictnull mode is awesome.

[saurabhranjansingh]

Annotate it with [JsonRequired].
Please note that it is a part of Newtonsoft.Json