Create SwaggerDefaultValues.cs

added Swagger Default values

Author: math2018avan

Supermarket/Swagger/SwaggerDefaultValues.cs

@@ -0,0 +1,44 @@
+using Swashbuckle.AspNetCore.Swagger;
+using Swashbuckle.AspNetCore.SwaggerGen;
+using System.Linq;
+
+namespace Supermarket.Swagger
+{
+    public class SwaggerDefaultValues : IOperationFilter
+    {
+        /// <summary>  
+        /// Applies the filter to the specified operation using the given context.  
+        /// </summary>  
+        /// <param name="operation">The operation to apply the filter to.</param>  
+        /// <param name="context">The current operation filter context.</param>  
+        public void Apply(Operation operation, OperationFilterContext context)
+        {
+            if (operation.Parameters == null)
+            {
+                return;
+            }
+            foreach (var parameter in operation.Parameters.OfType<NonBodyParameter>())
+            {
+                var description = context.ApiDescription.ParameterDescriptions.First(p => p.Name == parameter.Name);
+                var routeInfo = description.RouteInfo;
+
+                if (parameter.Description == null)
+                {
+                    parameter.Description = description.ModelMetadata?.Description;
+                }
+
+                if (routeInfo == null)
+                {
+                    continue;
+                }
+
+                if (parameter.Default == null)
+                {
+                    parameter.Default = routeInfo.DefaultValue;
+                }
+
+                parameter.Required |= !routeInfo.IsOptional;
+            }
+        }
+    }
+}