ValidatableModel does not list all validation errors

[jbe2277]

ValidatableModel does not list all validation errors when following is true:

• Object has validation errors found by validation attributes
• Object implements the IValidatableObject interface and this implementation returns additional validation errors
  In this situation ValidatableModel lists only the validation errors found by validation attributes and skips the errors found by IValidatableObject.

This is an issue of .NET. See: Add variant for Validator.TryValidateObject which provides all validation errors

[jbe2277]

System.Waf.Core 6.1 introduces the ValidationHelper class which sovles this issue. It provides the method:

public static IEnumerable<ValidationResult> Validate(object instance)

This method is similar to Validator.TryValidateObject(object, ValidationContext, ICollection<ValidationResult>, bool) with following adaptions:

• Returns always all found validation errors
• Simplified API
  • Does not support passing of a ValidationContext. This is not really needed.
  • Always validates all properties. Flag is not needed.
• Implementation is about 30% faster
  • New implementation needs just about 50% LoC of the original one.
  • The returned IEnumerable reads the errors on demand. Operations like Any() are very fast.

The ValidatableModel is using the new implementation starting with version 6.1.