build(): logs the InputType class name, if it is available.

Author: BetoFrega

lib/schema-builder/errors/cannot-determine-input-type.error.ts

@@ -1,7 +1,10 @@
+import { GqlTypeReference } from '../../interfaces';
+
 export class CannotDetermineInputTypeError extends Error {
-  constructor(hostType: string) {
+  constructor(hostType: string, typeRef?: GqlTypeReference) {
+    const inputObjectName: string | false = typeof typeRef === 'function' && typeRef.name;
     super(
-      `Cannot determine a GraphQL input type for the "${hostType}". Make sure your class is decorated with an appropriate decorator.`,
+      `Cannot determine a GraphQL input type for the "${hostType}"${inputObjectName ? `, on "${inputObjectName}` : null}". Make sure your class is decorated with an appropriate decorator.`,
     );
   }
 }

lib/schema-builder/factories/input-type.factory.ts

@@ -32,7 +32,7 @@ export class InputTypeFactory {
         typeRef as any,
       );
       if (!inputType) {
-        throw new CannotDetermineInputTypeError(hostType);
+        throw new CannotDetermineInputTypeError(hostType, typeRef);
       }
     }
     return this.typeMapperService.mapToGqlType(