Error "Duplicate schemaIds detected" without schema name.

Try to access http://localhost:52840/swagger/docs/v1 I got this message

Conflicting schemaIds: Duplicate schemaIds detected for types and . See the config setting - "UseFullTypeNameInSchemaIds" for a potential workaround

Use c.UseFullTypeNameInSchemaIds() in SwaggerConfig.cs still not help.

<Error>
<Message>An error has occurred.</Message>
<ExceptionMessage>
Conflicting schemaIds: Duplicate schemaIds detected for types and . See the config setting - "UseFullTypeNameInSchemaIds" for a potential workaround
</ExceptionMessage>
<ExceptionType>System.InvalidOperationException</ExceptionType>
<StackTrace>
at Swashbuckle.Swagger.SchemaRegistry.CreateRefSchema(Type type) at Swashbuckle.Swagger.SchemaRegistry.CreateInlineSchema(Type type) at Swashbuckle.Swagger.SchemaRegistry.GetOrRegister(Type type) at Swashbuckle.Swagger.SwaggerGenerator.CreateOperation(ApiDescription apiDesc, SchemaRegistry schemaRegistry) at Swashbuckle.Swagger.SwaggerGenerator.CreatePathItem(IEnumerable`1 apiDescriptions, SchemaRegistry schemaRegistry) at Swashbuckle.Swagger.SwaggerGenerator.<>c__DisplayClass7.<GetSwagger>b__4(IGrouping`2 group) at System.Linq.Enumerable.ToDictionary[TSource,TKey,TElement](IEnumerable`1 source, Func`2 keySelector, Func`2 elementSelector, IEqualityComparer`1 comparer) at Swashbuckle.Swagger.SwaggerGenerator.GetSwagger(String rootUrl, String apiVersion) at Swashbuckle.Application.SwaggerDocsHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) at System.Net.Http.HttpMessageInvoker.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) at System.Web.Http.Dispatcher.HttpRoutingDispatcher.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) at System.Net.Http.DelegatingHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) at System.Web.Http.HttpServer.<SendAsync>d__0.MoveNext()
</StackTrace>
</Error>

[Ghebrehiywet]

Every class in the swagger JSON must have a unique schemaId.

Swashbuckler tries to just use the class name as a simple schemaId, however if you have two classes in different namespaces with the same name (as you do) this will not work.

As the error suggests, you can use the config setting “UseFullTypeNameInSchemaIds” for a potential workaround.

if your concern is How to use “UseFullTypeNameInSchemaIds” in .NetCore middleware? you can achieve the same behavior via options.CustomSchemaIds(x => x.FullName).

Here is an example:

   services.ConfigureSwaggerGen(options =>
   {
       //your custom configuration goes here

...

  // UseFullTypeNameInSchemaIds replacement for .NET Core
       options.CustomSchemaIds(x => x.FullName);
   });

for more information

http://wegotcode.com/microsoft/swagger-fix-for-dotnetcore/

[malah-code]

This has been fixed when using UseFullTypeNameInSchemaIds option.

GlobalConfiguration.Configuration
                .EnableSwagger(c =>
                    {
c.UseFullTypeNameInSchemaIds();
});