Myujth

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);