public void DefaultValues()
{
// Arrange
var provider = new Mock<IModelMetadataProvider>();
// Act
var metadata = new ModelMetadata(provider.Object, typeof(Exception), () => "model", typeof(string), "propertyName");
// Assert
Assert.Equal(typeof(Exception), metadata.ContainerType);
Assert.True(metadata.ConvertEmptyStringToNull);
Assert.False(metadata.IsComplexType);
Assert.False(metadata.IsReadOnly);
Assert.False(metadata.IsRequired);
Assert.Null(metadata.Description);
Assert.Null(metadata.DisplayFormatString);
Assert.Null(metadata.DisplayName);
Assert.Null(metadata.EditFormatString);
Assert.Null(metadata.NullDisplayText);
Assert.Null(metadata.TemplateHint);
Assert.Equal("model", metadata.Model);
Assert.Equal("model", metadata.SimpleDisplayText);
Assert.Equal(typeof(string), metadata.ModelType);
Assert.Equal("propertyName", metadata.PropertyName);
}
public void LabelHelpers_ReturnEmptyForModel_IfMetadataPropertyNameEmpty()
{
// Arrange
var metadata = new ModelMetadata(
new DataAnnotationsModelMetadataProvider(),
containerType: null,
modelAccessor: null,
modelType: typeof(object),
propertyName: string.Empty);
var helper = DefaultTemplatesUtilities.GetHtmlHelper();
helper.ViewData.ModelMetadata = metadata;
// Act
var labelResult = helper.Label("");
var labelNullResult = helper.Label(expression: null); // null is another alias for current model
var labelForResult = helper.LabelFor(m => m);
var labelForModelResult = helper.LabelForModel();
// Assert
Assert.Empty(labelResult.ToString());
Assert.Empty(labelNullResult.ToString());
Assert.Empty(labelForResult.ToString());
Assert.Empty(labelForModelResult.ToString());
}
/// <summary>
/// Creates a new instance of <see cref="InputFormatterContext"/>.
/// </summary>
/// <param name="httpContext">
/// The <see cref="Http.HttpContext"/> for the current operation.
/// </param>
/// <param name="modelName">The name of the model.</param>
/// <param name="modelState">
/// The <see cref="ModelStateDictionary"/> for recording errors.
/// </param>
/// <param name="modelType">
/// The <see cref="Type"/> of the model to deserialize.
/// </param>
public InputFormatterContext(
HttpContext httpContext,
string modelName,
ModelStateDictionary modelState,
ModelMetadata metadata)
{
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
if (modelName == null)
{
throw new ArgumentNullException(nameof(modelName));
}
if (modelState == null)
{
throw new ArgumentNullException(nameof(modelState));
}
if (metadata == null)
{
throw new ArgumentNullException(nameof(metadata));
}
HttpContext = httpContext;
ModelName = modelName;
ModelState = modelState;
Metadata = metadata;
ModelType = metadata.ModelType;
}
private IEnumerable<IModelValidator> GetValidatorsForType(ModelMetadata metadata)
{
var attributes = metadata.ModelType
.GetTypeInfo()
.GetCustomAttributes();
return GetValidators(metadata, attributes);
}
/// <summary>
/// Creates a new <see cref="ModelExplorer"/>.
/// </summary>
/// <param name="metadataProvider">The <see cref="IModelMetadataProvider"/>.</param>
/// <param name="container">The container <see cref="ModelExplorer"/>.</param>
/// <param name="metadata">The <see cref="ModelMetadata"/>.</param>
/// <param name="modelAccessor">A model accessor function. May be <c>null</c>.</param>
public ModelExplorer(
IModelMetadataProvider metadataProvider,
ModelExplorer container,
ModelMetadata metadata,
Func<object, object> modelAccessor)
{
if (metadataProvider == null)
{
throw new ArgumentNullException(nameof(metadataProvider));
}
if (container == null)
{
throw new ArgumentNullException(nameof(container));
}
if (metadata == null)
{
throw new ArgumentNullException(nameof(metadata));
}
_metadataProvider = metadataProvider;
Container = container;
Metadata = metadata;
_modelAccessor = modelAccessor;
}
/// <summary>
/// Creates a new <see cref="ModelBindingContext"/> for top-level model binding operation.
/// </summary>
/// <param name="operationBindingContext">
/// The <see cref="OperationBindingContext"/> associated with the binding operation.
/// </param>
/// <param name="metadata"><see cref="ModelMetadata"/> associated with the model.</param>
/// <param name="bindingInfo"><see cref="BindingInfo"/> associated with the model.</param>
/// <param name="modelName">The name of the property or parameter being bound.</param>
/// <returns>A new instance of <see cref="ModelBindingContext"/>.</returns>
public static ModelBindingContext CreateBindingContext(
OperationBindingContext operationBindingContext,
ModelStateDictionary modelState,
ModelMetadata metadata,
BindingInfo bindingInfo,
string modelName)
{
if (operationBindingContext == null)
{
throw new ArgumentNullException(nameof(operationBindingContext));
}
if (modelState == null)
{
throw new ArgumentNullException(nameof(modelState));
}
if (metadata == null)
{
throw new ArgumentNullException(nameof(metadata));
}
if (modelName == null)
{
throw new ArgumentNullException(nameof(modelName));
}
var binderModelName = bindingInfo?.BinderModelName ?? metadata.BinderModelName;
var propertyPredicateProvider =
bindingInfo?.PropertyBindingPredicateProvider ?? metadata.PropertyBindingPredicateProvider;
return new ModelBindingContext()
{
BinderModelName = binderModelName,
BindingSource = bindingInfo?.BindingSource ?? metadata.BindingSource,
BinderType = bindingInfo?.BinderType ?? metadata.BinderType,
PropertyFilter = propertyPredicateProvider?.PropertyFilter,
// We only support fallback to empty prefix in cases where the model name is inferred from
// the parameter or property being bound.
FallbackToEmptyPrefix = binderModelName == null,
// Because this is the top-level context, FieldName and ModelName should be the same.
FieldName = binderModelName ?? modelName,
ModelName = binderModelName ?? modelName,
IsTopLevelObject = true,
ModelMetadata = metadata,
ModelState = modelState,
OperationBindingContext = operationBindingContext,
ValueProvider = operationBindingContext.ValueProvider,
ValidationState = new ValidationStateDictionary(),
};
}
public void IsComplexTypeTestsReturnsTrueForComplexTypes(Type type)
{
// Arrange
var provider = new Mock<IModelMetadataProvider>();
// Act
var modelMetadata = new ModelMetadata(provider.Object, null, null, type, null);
// Assert
Assert.True(modelMetadata.IsComplexType);
}
public ErrorsOrderer(ModelMetadata metadata)
{
if (metadata == null)
{
throw new ArgumentNullException(nameof(metadata));
}
foreach (var data in metadata.Properties)
{
_ordering[data.PropertyName] = data.Order;
}
}
public ModelValidationContext([NotNull] IModelMetadataProvider metadataProvider,
[NotNull] IEnumerable<IModelValidatorProvider> validatorProviders,
[NotNull] ModelStateDictionary modelState,
[NotNull] ModelMetadata metadata,
ModelMetadata containerMetadata)
{
ModelMetadata = metadata;
ModelState = modelState;
MetadataProvider = metadataProvider;
ValidatorProviders = validatorProviders;
ContainerMetadata = containerMetadata;
}
public TableColumn(ModelMetadata meta)
: this()
{
Id = meta.PropertyName;
For = meta.PropertyName;
Order = meta.Order;
Title = meta.DisplayName ?? meta.PropertyName.SplitCamelCase();
CellDisplayFormat = meta.DisplayFormatString;
CellNullDisplayText = meta.NullDisplayText;
CellUihint = meta.TemplateHint;
CellVisible = !meta.HideSurroundingHtml;
}
public TemplateBuilder(
IViewEngine viewEngine,
IViewBufferScope bufferScope,
ViewContext viewContext,
ViewDataDictionary viewData,
ModelExplorer modelExplorer,
string htmlFieldName,
string templateName,
bool readOnly,
object additionalViewData)
{
if (viewEngine == null)
{
throw new ArgumentNullException(nameof(viewEngine));
}
if (bufferScope == null)
{
throw new ArgumentNullException(nameof(_bufferScope));
}
if (viewContext == null)
{
throw new ArgumentNullException(nameof(viewContext));
}
if (viewData == null)
{
throw new ArgumentNullException(nameof(viewData));
}
if (modelExplorer == null)
{
throw new ArgumentNullException(nameof(modelExplorer));
}
_viewEngine = viewEngine;
_bufferScope = bufferScope;
_viewContext = viewContext;
_viewData = viewData;
_modelExplorer = modelExplorer;
_htmlFieldName = htmlFieldName;
_templateName = templateName;
_readOnly = readOnly;
_additionalViewData = additionalViewData;
_model = modelExplorer.Model;
_metadata = modelExplorer.Metadata;
}
protected override IEnumerable<IModelValidator> GetValidators(ModelMetadata metadata,
IEnumerable<Attribute> attributes)
{
if (metadata.ContainerType == null || string.IsNullOrEmpty(metadata.PropertyName))
{
// Validate that the type's fields and nonpublic properties don't have any validation attributes on
// them. Validation only runs against public properties
var type = metadata.ModelType;
var nonPublicProperties = type.GetProperties(BindingFlags.NonPublic | BindingFlags.Instance);
foreach (var nonPublicProperty in nonPublicProperties)
{
if (nonPublicProperty.GetCustomAttributes(typeof(ValidationAttribute), inherit: true).Any())
{
var message = Resources.FormatValidationAttributeOnNonPublicProperty(nonPublicProperty.Name,
type);
yield return new ErrorModelValidator(message);
}
}
var bindingFlags = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance;
var allFields = metadata.ModelType.GetFields(bindingFlags);
foreach (var field in allFields)
{
if (field.GetCustomAttributes(typeof(ValidationAttribute), inherit: true).Any())
{
var message = Resources.FormatValidationAttributeOnField(field.Name, type);
yield return new ErrorModelValidator(message);
}
}
}
else
{
// Validate that value-typed properties marked as [Required] are also marked as
// [DataMember(IsRequired=true)]. Certain formatters may not recognize a member as required if it's
// marked as [Required] but not [DataMember(IsRequired=true)]. This is not a problem for reference
// types because [Required] will still cause a model error to be raised after a null value is
// deserialized.
if (metadata.ModelType.GetTypeInfo().IsValueType &&
attributes.Any(attribute => attribute is RequiredAttribute))
{
if (!DataMemberModelValidatorProvider.IsRequiredDataMember(metadata.ContainerType, attributes))
{
var message = Resources.FormatMissingDataMemberIsRequired(metadata.PropertyName,
metadata.ContainerType);
yield return new ErrorModelValidator(message);
}
}
}
}
protected override IEnumerable<IModelValidator> GetValidators(ModelMetadata metadata,
IEnumerable<Attribute> attributes)
{
// Types cannot be required; only properties can
if (metadata.ContainerType == null || string.IsNullOrEmpty(metadata.PropertyName))
{
return Enumerable.Empty<IModelValidator>();
}
if (IsRequiredDataMember(metadata.ContainerType, attributes))
{
return new[] { new RequiredMemberModelValidator() };
}
return Enumerable.Empty<IModelValidator>();
}
public TemplateBuilder([NotNull] IViewEngine viewEngine,
[NotNull] ViewContext viewContext,
[NotNull] ViewDataDictionary viewData,
[NotNull] ModelMetadata metadata,
string htmlFieldName,
string templateName,
bool readOnly,
object additionalViewData)
{
_viewEngine = viewEngine;
_viewContext = viewContext;
_viewData = viewData;
_metadata = metadata;
_htmlFieldName = htmlFieldName;
_templateName = templateName;
_readOnly = readOnly;
_additionalViewData = additionalViewData;
}
/// <summary>
/// Creates a new <see cref="ModelExplorer"/>.
/// </summary>
/// <param name="metadataProvider">The <see cref="IModelMetadataProvider"/>.</param>
/// <param name="metadata">The <see cref="ModelMetadata"/>.</param>
/// <param name="model">The model object. May be <c>null</c>.</param>
public ModelExplorer(
IModelMetadataProvider metadataProvider,
ModelMetadata metadata,
object model)
{
if (metadataProvider == null)
{
throw new ArgumentNullException(nameof(metadataProvider));
}
if (metadata == null)
{
throw new ArgumentNullException(nameof(metadata));
}
_metadataProvider = metadataProvider;
Metadata = metadata;
_model = model;
}
private IEnumerable<IModelValidator> GetValidatorsForProperty(ModelMetadata metadata)
{
var propertyName = metadata.PropertyName;
var bindingFlags = BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase;
var property = metadata.ContainerType
.GetProperty(propertyName, bindingFlags);
if (property == null)
{
throw new ArgumentException(
Resources.FormatCommon_PropertyNotFound(
metadata.ContainerType.FullName,
metadata.PropertyName),
"metadata");
}
var attributes = property.GetCustomAttributes();
return GetValidators(metadata, attributes);
}
/// <summary>
/// Creates a new instance of <see cref="InputFormatterContext"/>.
/// </summary>
/// <param name="httpContext">
/// The <see cref="Http.HttpContext"/> for the current operation.
/// </param>
/// <param name="modelName">The name of the model.</param>
/// <param name="modelState">
/// The <see cref="ModelStateDictionary"/> for recording errors.
/// </param>
/// <param name="metadata">
/// The <see cref="ModelMetadata"/> of the model to deserialize.
/// </param>
/// <param name="readerFactory">
/// A delegate which can create a <see cref="TextReader"/> for the request body.
/// </param>
public InputFormatterContext(
HttpContext httpContext,
string modelName,
ModelStateDictionary modelState,
ModelMetadata metadata,
Func<Stream, Encoding, TextReader> readerFactory)
{
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
if (modelName == null)
{
throw new ArgumentNullException(nameof(modelName));
}
if (modelState == null)
{
throw new ArgumentNullException(nameof(modelState));
}
if (metadata == null)
{
throw new ArgumentNullException(nameof(metadata));
}
if (readerFactory == null)
{
throw new ArgumentNullException(nameof(readerFactory));
}
HttpContext = httpContext;
ModelName = modelName;
ModelState = modelState;
Metadata = metadata;
ReaderFactory = readerFactory;
ModelType = metadata.ModelType;
}
public void ValidateSetsMemberNamePropertyOfValidationContextForProperties(ModelMetadata metadata,
string expectedMemberName)
{
// Arrange
var attribute = new Mock<ValidationAttribute> { CallBase = true };
attribute.Protected()
.Setup<ValidationResult>("IsValid", ItExpr.IsAny<object>(), ItExpr.IsAny<ValidationContext>())
.Callback((object o, ValidationContext context) =>
{
Assert.Equal(expectedMemberName, context.MemberName);
})
.Returns(ValidationResult.Success)
.Verifiable();
var validator = new DataAnnotationsModelValidator(attribute.Object);
var validationContext = CreateValidationContext(metadata);
// Act
var results = validator.Validate(validationContext);
// Assert
Assert.Empty(results);
attribute.VerifyAll();
}
protected override IEnumerable<IModelValidator> GetValidators(ModelMetadata metadata,
IEnumerable<Attribute> attributes)
{
var results = new List<IModelValidator>();
// Produce a validator for each validation attribute we find
foreach (var attribute in attributes.OfType<ValidationAttribute>())
{
DataAnnotationsModelValidationFactory factory;
if (!_attributeFactories.TryGetValue(attribute.GetType(), out factory))
{
factory = _defaultAttributeFactory;
}
results.Add(factory(attribute));
}
// Produce a validator if the type supports IValidatableObject
if (typeof(IValidatableObject).IsAssignableFrom(metadata.ModelType))
{
results.Add(_defaultValidatableFactory());
}
return results;
}
public static IEnumerable<string> GetTypeNames(ModelMetadata modelMetadata, Type fieldType)
{
// Not returning type name here for IEnumerable<IFormFile> since we will be returning
// a more specific name, IEnumerableOfIFormFileName.
var fieldTypeInfo = fieldType.GetTypeInfo();
if (typeof(IEnumerable<IFormFile>) != fieldType)
{
yield return fieldType.Name;
}
if (fieldType == typeof(string))
{
// Nothing more to provide
yield break;
}
else if (!modelMetadata.IsComplexType)
{
// IsEnum is false for the Enum class itself
if (fieldTypeInfo.IsEnum)
{
// Same as fieldType.BaseType.Name in this case
yield return "Enum";
}
else if (fieldType == typeof(DateTimeOffset))
{
yield return "DateTime";
}
yield return "String";
yield break;
}
else if (!fieldTypeInfo.IsInterface)
{
var type = fieldType;
while (true)
{
type = type.GetTypeInfo().BaseType;
if (type == null || type == typeof(object))
{
break;
}
yield return type.Name;
}
}
if (typeof(IEnumerable).GetTypeInfo().IsAssignableFrom(fieldTypeInfo))
{
if (typeof(IEnumerable<IFormFile>).GetTypeInfo().IsAssignableFrom(fieldTypeInfo))
{
yield return IEnumerableOfIFormFileName;
// Specific name has already been returned, now return the generic name.
if (typeof(IEnumerable<IFormFile>) == fieldType)
{
yield return fieldType.Name;
}
}
yield return "Collection";
}
else if (typeof(IFormFile) != fieldType && typeof(IFormFile).GetTypeInfo().IsAssignableFrom(fieldTypeInfo))
{
yield return nameof(IFormFile);
}
yield return "Object";
}
protected override IEnumerable<SelectListItem> GetEnumSelectList(ModelMetadata metadata)
{
Metadata = metadata;
SelectListItems = base.GetEnumSelectList(metadata);
if (SelectListItems != null)
{
// Perform a deep copy to help confirm the mutable items are not changed.
var copiedSelectListItems = new List<SelectListItem>();
CopiedSelectListItems = copiedSelectListItems;
foreach (var item in SelectListItems)
{
var copy = new SelectListItem
{
Disabled = item.Disabled,
Group = item.Group,
Selected = item.Selected,
Text = item.Text,
Value = item.Value,
};
copiedSelectListItems.Add(copy);
}
}
return SelectListItems;
}
public abstract IEnumerable<IModelValidator> AbstractGetValidators(ModelMetadata metadata, IEnumerable<Attribute> attributes);
protected override IEnumerable<IModelValidator> GetValidators(ModelMetadata metadata, IEnumerable<Attribute> attributes)
{
return AbstractGetValidators(metadata, attributes);
}
public new void SetProperty(
ModelBindingContext bindingContext,
ModelExplorer modelExplorer,
ModelMetadata propertyMetadata,
ModelBindingResult result)
{
base.SetProperty(bindingContext, modelExplorer, propertyMetadata, result);
}
protected override bool CanUpdateProperty(ModelMetadata propertyMetadata)
{
return CanUpdatePropertyPublic(propertyMetadata);
}
private static ModelBindingContext CreateContext(ModelMetadata metadata, object model)
{
return new ModelBindingContext
{
Model = model,
ModelState = new ModelStateDictionary(),
ModelMetadata = metadata,
ModelName = "theModel",
OperationBindingContext = new OperationBindingContext
{
MetadataProvider = TestModelMetadataProvider.CreateDefaultProvider(),
ValidatorProvider = TestModelValidatorProvider.CreateDefaultProvider(),
}
};
}
internal static bool CanUpdatePropertyInternal(ModelMetadata propertyMetadata)
{
return(!propertyMetadata.IsReadOnly || CanUpdateReadOnlyProperty(propertyMetadata.ModelType));
}
private static ModelValidationContext CreateValidationContext(ModelMetadata metadata)
{
return(new ModelValidationContext(null, null, null, metadata, null));
}
private static bool ShouldShow(ModelMetadata metadata, TemplateInfo templateInfo)
{
return
metadata.ShowForDisplay &&
!metadata.IsComplexType &&
!templateInfo.Visited(metadata);
}
// Called when the property setter null check failed, allows us to add our own error message to ModelState.
internal static EventHandler <ModelValidatedEventArgs> CreateNullCheckFailedHandler(ModelMetadata modelMetadata,
object incomingValue)
{
return((sender, e) =>
{
var validationNode = (ModelValidationNode)sender;
var modelState = e.ValidationContext.ModelState;
var validationState = modelState.GetFieldValidationState(validationNode.ModelStateKey);
if (validationState == ModelValidationState.Unvalidated)
{
// TODO: https://github.com/aspnet/Mvc/issues/450 Revive ModelBinderConfig
// var errorMessage = ModelBinderConfig.ValueRequiredErrorMessageProvider(e.ValidationContext,
// modelMetadata,
// incomingValue);
var errorMessage = Resources.ModelBinderConfig_ValueRequired;
if (errorMessage != null)
{
modelState.TryAddModelError(validationNode.ModelStateKey, errorMessage);
}
}
});
}
protected virtual void SetProperty(ModelBindingContext bindingContext,
ModelMetadata propertyMetadata,
ComplexModelDtoResult dtoResult,
IModelValidator requiredValidator)
{
var bindingFlags = BindingFlags.Instance | BindingFlags.Public | BindingFlags.IgnoreCase;
var property = bindingContext.ModelType
.GetProperty(propertyMetadata.PropertyName, bindingFlags);
if (property == null || !property.CanWrite)
{
// nothing to do
return;
}
object value;
var hasDefaultValue = false;
if (dtoResult.IsModelBound)
{
value = dtoResult.Model;
}
else
{
hasDefaultValue = TryGetPropertyDefaultValue(property, out value);
}
propertyMetadata.Model = value;
// 'Required' validators need to run first so that we can provide useful error messages if
// the property setters throw, e.g. if we're setting entity keys to null.
if (value == null)
{
var modelStateKey = dtoResult.ValidationNode.ModelStateKey;
var validationState = bindingContext.ModelState.GetFieldValidationState(modelStateKey);
if (validationState == ModelValidationState.Unvalidated)
{
if (requiredValidator != null)
{
var validationContext = new ModelValidationContext(bindingContext, propertyMetadata);
foreach (var validationResult in requiredValidator.Validate(validationContext))
{
bindingContext.ModelState.TryAddModelError(modelStateKey, validationResult.Message);
}
}
}
}
if (!dtoResult.IsModelBound && !hasDefaultValue)
{
// If we don't have a value, don't set it on the model and trounce a pre-initialized
// value.
return;
}
if (value != null || property.PropertyType.AllowsNullValue())
{
try
{
property.SetValue(bindingContext.Model, value);
}
catch (Exception ex)
{
// don't display a duplicate error message if a binding error has already occurred for this field
var targetInvocationException = ex as TargetInvocationException;
if (targetInvocationException != null &&
targetInvocationException.InnerException != null)
{
ex = targetInvocationException.InnerException;
}
var modelStateKey = dtoResult.ValidationNode.ModelStateKey;
var validationState = bindingContext.ModelState.GetFieldValidationState(modelStateKey);
if (validationState == ModelValidationState.Unvalidated)
{
bindingContext.ModelState.AddModelError(modelStateKey, ex);
}
}
}
else
{
// trying to set a non-nullable value type to null, need to make sure there's a message
var modelStateKey = dtoResult.ValidationNode.ModelStateKey;
var validationState = bindingContext.ModelState.GetFieldValidationState(modelStateKey);
if (validationState == ModelValidationState.Unvalidated)
{
dtoResult.ValidationNode.Validated += CreateNullCheckFailedHandler(propertyMetadata, value);
}
}
}
private ModelMetadata GetPathMetadata(ModelMetadata metadata, string path)
{
var index = 0;
while (index >= 0 && index < path.Length)
{
if (path[index] == '[')
{
// At start of "[0]".
if (metadata.ElementMetadata == null)
{
// Odd case but don't throw just because ErrorContext had an odd-looking path.
break;
}
metadata = metadata.ElementMetadata;
index = path.IndexOf(']', index);
}
else if (path[index] == '.' || path[index] == ']')
{
// Skip '.' in "prefix.property" or "[0].property" or ']' in "[0]".
index++;
}
else
{
// At start of "property", "property." or "property[0]".
var endIndex = path.IndexOfAny(new[] { '.', '[' }, index);
if (endIndex == -1)
{
endIndex = path.Length;
}
var propertyName = path.Substring(index, endIndex - index);
if (metadata.Properties[propertyName] == null)
{
// Odd case but don't throw just because ErrorContext had an odd-looking path.
break;
}
metadata = metadata.Properties[propertyName];
index = endIndex;
}
}
return metadata;
}
public virtual bool CanUpdatePropertyPublic(ModelMetadata propertyMetadata)
{
return base.CanUpdateProperty(propertyMetadata);
}
protected abstract IEnumerable<IModelValidator> GetValidators(ModelMetadata metadata,
IEnumerable<Attribute> attributes);
protected virtual bool CanUpdateProperty(ModelMetadata propertyMetadata)
{
return(CanUpdatePropertyInternal(propertyMetadata));
}