Vfrdtyky

I am creating a public API that uses multiple private APIs (can not be accessed from outside). Business validations have been written for the private APIs and I do not want to re-write them for the public API. But I do want the swagger documentation to be the same.

That is why I wonder if I can mark property as mandatory, without using the Required attribute of ASP.NET. But that the swagger documentation indicates that it is mandatory. Is this possible?

Yes, it's possible. Add your custom class implementing IOperationFilter

public class UpdateParametersAsRequired : IOperationFilter

{

    public void Apply(Operation operation, SchemaRegistry s, ApiDescription a)

    {

        if (operation.OperationId == "ControllerName_Action")

        {

            if (operation.Parameters != null)

            {

                foreach (var parameter in operation.Parameters)

                {

                    if (parameter.Name == "ParameterYouWantToEdit")

                    { 

                        // You can edit the properties here

                        parameter.Required = true;

                    }

                }

            }

            else

            {

              // Add parameters if doesn't exists any

                operation.Parameters = new List<IParameter>();

                operation.Parameters.Add(

                    new Parameter

                    {

                        name = "ParameterName",

                        @in = "body",

                        @default = "123",

                        type = "string",

                        description = "x y z",

                        required = true

                    }

                );

            }

        }

    }

}

Cheers!

Thanks to Mohsin, I solved my problem. The following I came up with, I created an attribute called SwaggerRequired. This attribute can be placed on any model. The AddSwaggerRequiredSchemaFilter then ensures that the Swagger documentation is modified.
See below the code I wrote for this

A random model:

public class Foo

{

    [SwaggerRequired]

    public string FooBar{ get; set; }

}

The SwaggerRequiredAttribute:

[AttributeUsage(AttributeTargets.Property)] 

public class SwaggerRequiredAttribute : Attribute

{

}

And the AddSwaggerRequiredSchemaFilter to get it working:

public class AddSwaggerRequiredSchemaFilter : ISchemaFilter

{

    public void Apply(Swashbuckle.Swagger.Schema schema, SchemaRegistry schemaRegistry, Type type)

    {

        PropertyInfo properties = type.GetProperties();

        foreach (PropertyInfo property in properties)

        {

            var attribute = property.GetCustomAttribute(typeof(SwaggerRequiredAttribute));



            if (attribute != null)

            {

                var propertyNameInCamelCasing = char.ToLowerInvariant(property.Name[0]) + property.Name.Substring(1);



                if (schema.required == null)

                {

                    schema.required = new List<string>()

                    {

                        propertyNameInCamelCasing

                    };

                }

                else

                {

                    schema.required.Add(propertyNameInCamelCasing);

                }

            }

        }

    }

}