public static IEnumerable <ValidationRuleError> Check(CandidateValidation candidate)
{
foreach (var source in candidate.Fields)
{
if (!TypeCompatibility.Check(source))
{
var errorMessage = DescribeTypeMismatch(candidate, source);
yield return(new ValidationRuleError(errorMessage));
}
}
}
private static string DescribeTypeMismatch(CandidateValidation candidate, ValidationFieldSource source)
{
var targetFieldRef = source.TargetField.TargetFieldInfo.Field.Describe();
var targetType = source.Target.GetType().Name;
var targetFieldType = source.TargetField.TargetFieldInfo.Type.Name;
var validationDesc = $"{candidate.Validation.ContainingType.Name}.{candidate.Validation.Method.Name}";
var validationParamRef = source.Field.Name;
var validationParamType = source.Field.Type.Name;
var errorMessage =
$"{targetFieldRef} on {targetType} has type {targetFieldType} which is not compatible with validation {validationDesc}'s {validationParamRef} which requires {validationParamType}";
return(errorMessage);
}
public CandidateValidation(ValidationFieldSource extraFieldSource, CandidateValidation candidateValidation)
{
Validation = candidateValidation.Validation;
Fields = candidateValidation.Fields.Concat(Enumerate(extraFieldSource)).ToList();
}
public RequiredValidation(CandidateValidation candidateValidation)
{
Validation = candidateValidation.Validation;
Targets = candidateValidation.Fields.Select(f => f.Target).Distinct().ToList();
}