Exceptions during startup for polymorphic types

I’m getting the following exception during application startup for polymorphic types. I don’t have time right now to try and mock something reproducible, but let me know if this is enough to get you started.

This exception is the derived type, but I also get a very similar exception for the base type, QueryBuilderBase.

[2021-01-26 18:35:05.495] [WRN] [MicroElements.Swashbuckle.FluentValidation.FluentValidationRules] [R:80000026-0000-fe00-b63f-84710c7967bb|T:cfb2b7e2dec6de49bd5c0d020c65d981|S:30ccdb394b7e8940] Applying IncludeRules for type 'QueryBuilder.Models.QueryBuilderQuery' fails.
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at FluentValidation.Validators.PropertyValidatorContext.get_PropertyValue() in /home/jskinner/code/FluentValidation/src/FluentValidation/Validators/PropertyValidatorContext.cs:line 52
   at FluentValidation.Validators.PolymorphicValidator`2.GetValidator(PropertyValidatorContext context) in /home/jskinner/code/FluentValidation/src/FluentValidation/Validators/PolymorphicValidator.cs:line 103
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
   at MicroElements.Swashbuckle.FluentValidation.FluentValidationSchemaBuilder.GetValidatorFromChildValidatorAdapter(IChildValidatorAdaptor childValidatorAdapter) in /home/runner/work/MicroElements.Swashbuckle.FluentValidation/MicroElements.Swashbuckle.FluentValidation/src/MicroElements.Swashbuckle.FluentValidation/FluentValidationSchemaBuilder.cs:line 140
   at MicroElements.Swashbuckle.FluentValidation.FluentValidationSchemaBuilder.AddRulesFromIncludedValidators(OpenApiSchema schema, SchemaFilterContext schemaFilterContext, IValidator validator, IReadOnlyCollection`1 rules, ILogger logger) in /home/runner/work/MicroElements.Swashbuckle.FluentValidation/MicroElements.Swashbuckle.FluentValidation/src/MicroElements.Swashbuckle.FluentValidation/FluentValidationSchemaBuilder.cs:line 106
   at MicroElements.Swashbuckle.FluentValidation.FluentValidationSchemaBuilder.AddRulesFromIncludedValidators(OpenApiSchema schema, SchemaFilterContext schemaFilterContext, IValidator validator, IReadOnlyCollection`1 rules, ILogger logger) in /home/runner/work/MicroElements.Swashbuckle.FluentValidation/MicroElements.Swashbuckle.FluentValidation/src/MicroElements.Swashbuckle.FluentValidation/FluentValidationSchemaBuilder.cs:line 106
   at MicroElements.Swashbuckle.FluentValidation.FluentValidationRules.AddRulesFromIncludedValidators(OpenApiSchema schema, SchemaFilterContext context, IValidator validator) in /home/runner/work/MicroElements.Swashbuckle.FluentValidation/MicroElements.Swashbuckle.FluentValidation/src/MicroElements.Swashbuckle.FluentValidation/FluentValidationRules.cs:line 96
   at MicroElements.Swashbuckle.FluentValidation.FluentValidationRules.Apply(OpenApiSchema schema, SchemaFilterContext context) in /home/runner/work/MicroElements.Swashbuckle.FluentValidation/MicroElements.Swashbuckle.FluentValidation/src/MicroElements.Swashbuckle.FluentValidation/FluentValidationRules.cs:line 68

[ErikPilsits-RJW]

Yeah I’ll see if I can’t add something in SampleWebApi (App?) to repro and send you a PR. Might be next week.

[petriashev]

Can you add sample in SampleWebApp or test?