public IEnumerable<ModelValidationResult> Validate(ModelValidationContext validationContext)
{
var metadata = validationContext.ModelMetadata;
var memberName = metadata.PropertyName ?? metadata.ModelType.Name;
var containerMetadata = validationContext.ContainerMetadata;
var container = containerMetadata != null ? containerMetadata.Model : null;
var context = new ValidationContext(container ?? metadata.Model)
{
DisplayName = metadata.GetDisplayName(),
MemberName = memberName
};
var result = Attribute.GetValidationResult(metadata.Model, context);
if (result != ValidationResult.Success)
{
// ModelValidationResult.MemberName is used by invoking validators (such as ModelValidator) to
// construct the ModelKey for ModelStateDictionary. When validating at type level we want to append
// the returned MemberNames if specified (e.g. person.Address.FirstName). For property validation, the
// ModelKey can be constructed using the ModelMetadata and we should ignore MemberName (we don't want
// (person.Name.Name). However the invoking validator does not have a way to distinguish between these
// two cases. Consequently we'll only set MemberName if this validation returns a MemberName that is
// different from the property being validated.
var errorMemberName = result.MemberNames.FirstOrDefault();
if (string.Equals(errorMemberName, memberName, StringComparison.Ordinal))
{
errorMemberName = null;
}
var validationResult = new ModelValidationResult(errorMemberName, result.ErrorMessage);
return new ModelValidationResult[] { validationResult };
}
return Enumerable.Empty<ModelValidationResult>();
}
public void ValidateReturnsMemberNameIfItIsDifferentFromDisplayName()
{
// Arrange
var metadata = _metadataProvider.GetMetadataForType(() => new SampleModel(), typeof(SampleModel));
var attribute = new Mock <ValidationAttribute> {
CallBase = true
};
attribute.Protected()
.Setup <ValidationResult>("IsValid", ItExpr.IsAny <object>(), ItExpr.IsAny <ValidationContext>())
.Returns(new ValidationResult("Name error", new[] { "Name" }));
var validator = new DataAnnotationsModelValidator(attribute.Object);
var validationContext = CreateValidationContext(metadata);
// Act
var results = validator.Validate(validationContext);
// Assert
ModelValidationResult validationResult = Assert.Single(results);
Assert.Equal("Name", validationResult.MemberName);
}
public void ValidateReturnsSingleValidationResultIfOneMemberNameIsSpecified()
{
// Arrange
const string errorMessage = "A different error message";
var metadata = _metadataProvider.GetMetadataForType(() => new object(), typeof(object));
var attribute = new Mock <ValidationAttribute> {
CallBase = true
};
attribute.Protected()
.Setup <ValidationResult>("IsValid", ItExpr.IsAny <object>(), ItExpr.IsAny <ValidationContext>())
.Returns(new ValidationResult(errorMessage, new[] { "FirstName" }));
var validator = new DataAnnotationsModelValidator(attribute.Object);
var validationContext = CreateValidationContext(metadata);
// Act
var results = validator.Validate(validationContext);
// Assert
ModelValidationResult validationResult = Assert.Single(results);
Assert.Equal(errorMessage, validationResult.Message);
Assert.Equal("FirstName", validationResult.MemberName);
}
public void ValidateReturnsSingleValidationResultIfMemberNameSequenceIsEmpty()
{
// Arrange
const string errorMessage = "Some error message";
var metadata = _metadataProvider.GetMetadataForProperty(() => 15, typeof(string), "Length");
var attribute = new Mock <ValidationAttribute> {
CallBase = true
};
attribute.Protected()
.Setup <ValidationResult>("IsValid", ItExpr.IsAny <object>(), ItExpr.IsAny <ValidationContext>())
.Returns(new ValidationResult(errorMessage, memberNames: null));
var validator = new DataAnnotationsModelValidator(attribute.Object);
var validationContext = CreateValidationContext(metadata);
// Act
var results = validator.Validate(validationContext);
// Assert
ModelValidationResult validationResult = Assert.Single(results);
Assert.Equal(errorMessage, validationResult.Message);
Assert.Empty(validationResult.MemberName);
}
public IEnumerable <ModelValidationResult> Validate(ModelValidationContext validationContext)
{
var metadata = validationContext.ModelMetadata;
var memberName = metadata.PropertyName ?? metadata.ModelType.Name;
var containerMetadata = validationContext.ContainerMetadata;
var container = containerMetadata != null ? containerMetadata.Model : null;
var context = new ValidationContext(container ?? metadata.Model)
{
DisplayName = metadata.GetDisplayName(),
MemberName = memberName
};
var result = Attribute.GetValidationResult(metadata.Model, context);
if (result != ValidationResult.Success)
{
// ModelValidationResult.MemberName is used by invoking validators (such as ModelValidator) to
// construct the ModelKey for ModelStateDictionary. When validating at type level we want to append
// the returned MemberNames if specified (e.g. person.Address.FirstName). For property validation, the
// ModelKey can be constructed using the ModelMetadata and we should ignore MemberName (we don't want
// (person.Name.Name). However the invoking validator does not have a way to distinguish between these
// two cases. Consequently we'll only set MemberName if this validation returns a MemberName that is
// different from the property being validated.
var errorMemberName = result.MemberNames.FirstOrDefault();
if (string.Equals(errorMemberName, memberName, StringComparison.Ordinal))
{
errorMemberName = null;
}
var validationResult = new ModelValidationResult(errorMemberName, result.ErrorMessage);
return(new ModelValidationResult[] { validationResult });
}
return(Enumerable.Empty <ModelValidationResult>());
}
private static ModelValidationResult CreateSubPropertyResult(ModelMetadata propertyMetadata,
ModelValidationResult propertyResult)
{
return new ModelValidationResult(propertyMetadata.PropertyName + '.' + propertyResult.MemberName,
propertyResult.Message);
}
private static ModelValidationResult CreateSubPropertyResult(ModelMetadata propertyMetadata,
ModelValidationResult propertyResult)
{
return(new ModelValidationResult(propertyMetadata.PropertyName + '.' + propertyResult.MemberName,
propertyResult.Message));
}
