/// <summary>
/// Gets the collection of registered <see cref="ModelValidator"/> instances.
/// </summary>
/// <param name="actionContext">The context.</param>
/// <param name="metadata">The metadata.</param>
/// <returns>A collection of registered <see cref="ModelValidator"/> instances.</returns>
public static IEnumerable <ModelValidator> GetValidators(this HttpActionContext actionContext, ModelMetadata metadata)
{
if (actionContext == null)
{
throw Error.ArgumentNull("actionContext");
}
IModelValidatorCache validatorCache = actionContext.GetValidatorCache();
return(actionContext.GetValidators(metadata, validatorCache));
}
internal static void GetRequiredPropertiesCollection(HttpActionContext actionContext, ModelBindingContext bindingContext, out HashSet<string> requiredProperties, out Dictionary<string, ModelValidator> requiredValidators, out HashSet<string> skipProperties)
{
requiredProperties = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
requiredValidators = new Dictionary<string, ModelValidator>(StringComparer.OrdinalIgnoreCase);
skipProperties = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
// Use attributes on the property before attributes on the type.
ICustomTypeDescriptor modelDescriptor = TypeDescriptorHelper.Get(bindingContext.ModelType);
PropertyDescriptorCollection propertyDescriptors = modelDescriptor.GetProperties();
HttpBindingBehaviorAttribute typeAttr = modelDescriptor.GetAttributes().OfType<HttpBindingBehaviorAttribute>().SingleOrDefault();
foreach (PropertyDescriptor propertyDescriptor in propertyDescriptors)
{
string propertyName = propertyDescriptor.Name;
ModelMetadata propertyMetadata = bindingContext.PropertyMetadata[propertyName];
ModelValidator requiredValidator = actionContext.GetValidators(propertyMetadata).Where(v => v.IsRequired).FirstOrDefault();
requiredValidators[propertyName] = requiredValidator;
HttpBindingBehaviorAttribute propAttr = propertyDescriptor.Attributes.OfType<HttpBindingBehaviorAttribute>().SingleOrDefault();
HttpBindingBehaviorAttribute workingAttr = propAttr ?? typeAttr;
if (workingAttr != null)
{
switch (workingAttr.Behavior)
{
case HttpBindingBehavior.Required:
requiredProperties.Add(propertyName);
break;
case HttpBindingBehavior.Never:
skipProperties.Add(propertyName);
break;
}
}
else if (requiredValidator != null)
{
requiredProperties.Add(propertyName);
}
}
}
private void ValidateThis(HttpActionContext actionContext, ModelValidationNode parentNode)
{
ModelStateDictionary modelState = actionContext.ModelState;
if (!modelState.IsValidField(ModelStateKey))
{
return; // short-circuit
}
// If 'this' is null and there is no parent, we cannot validate, and
// the DataAnnotationsModelValidator will throw. So we intercept here
// to provide a catch-all value-required validation error
if (parentNode == null && ModelMetadata.Model == null)
{
string trueModelStateKey = ModelBindingHelper.CreatePropertyModelName(ModelStateKey, ModelMetadata.GetDisplayName());
modelState.AddModelError(trueModelStateKey, SRResources.Validation_ValueNotFound);
return;
}
_validators = actionContext.GetValidators(ModelMetadata);
object container = TryConvertContainerToMetadataType(parentNode);
foreach (ModelValidator validator in _validators)
{
foreach (ModelValidationResult validationResult in validator.Validate(ModelMetadata, container))
{
string trueModelStateKey = ModelBindingHelper.CreatePropertyModelName(ModelStateKey, validationResult.MemberName);
modelState.AddModelError(trueModelStateKey, validationResult.Message);
}
}
}
private void ValidateProperties(HttpActionContext actionContext)
{
// Based off CompositeModelValidator.
ModelStateDictionary modelState = actionContext.ModelState;
// DevDiv Bugs #227802 - Caching problem in ModelMetadata requires us to manually regenerate
// the ModelMetadata.
object model = ModelMetadata.Model;
ModelMetadata updatedMetadata = actionContext.GetMetadataProvider().GetMetadataForType(() => model, ModelMetadata.ModelType);
foreach (ModelMetadata propertyMetadata in updatedMetadata.Properties)
{
// Only want to add errors to ModelState if something doesn't already exist for the property node,
// else we could end up with duplicate or irrelevant error messages.
string propertyKeyRoot = ModelBindingHelper.CreatePropertyModelName(ModelStateKey, propertyMetadata.PropertyName);
if (modelState.IsValidField(propertyKeyRoot))
{
foreach (ModelValidator propertyValidator in actionContext.GetValidators(propertyMetadata))
{
foreach (ModelValidationResult propertyResult in propertyValidator.Validate(propertyMetadata, model))
{
string thisErrorKey = ModelBindingHelper.CreatePropertyModelName(propertyKeyRoot, propertyResult.MemberName);
modelState.AddModelError(thisErrorKey, propertyResult.Message);
}
}
}
}
}