protected override ModelMetadata CreateMetadata(IEnumerable <Attribute> attributes, Type containerType, Func <object> modelAccessor, Type modelType, string propertyName)
{
Func <IEnumerable <Attribute>, ModelMetadata> metadataFactory = (attr) => base.CreateMetadata(attr, containerType, modelAccessor, modelType, propertyName);
var conventionType = containerType ?? modelType;
Type defaultResourceType = DefaultResourceType;
MetadataConventionsAttribute conventionAttribute = conventionType.GetAttributeOnTypeOrAssembly <MetadataConventionsAttribute>();
if (conventionAttribute != null && conventionAttribute.ResourceType != null)
{
defaultResourceType = conventionAttribute.ResourceType;
}
else if (RequireConventionAttribute)
{
return(metadataFactory(attributes));
}
ApplyConventionsToValidationAttributes(attributes, containerType, propertyName, defaultResourceType);
var foundDisplayAttribute = attributes.FirstOrDefault(a => typeof(DisplayAttribute) == a.GetType()) as DisplayAttribute;
if (foundDisplayAttribute.CanSupplyDisplayName())
{
return(metadataFactory(attributes));
}
// Our displayAttribute is lacking. Time to get busy.
DisplayAttribute displayAttribute = foundDisplayAttribute.Copy() ?? new DisplayAttribute();
var rewrittenAttributes = attributes.Replace(foundDisplayAttribute, displayAttribute);
// ensure resource type.
displayAttribute.ResourceType = displayAttribute.ResourceType ?? defaultResourceType;
if (displayAttribute.ResourceType != null)
{
// ensure resource name
string displayAttributeName = GetDisplayAttributeName(containerType, propertyName, displayAttribute);
if (displayAttributeName != null)
{
displayAttribute.Name = displayAttributeName;
}
if (!displayAttribute.ResourceType.PropertyExists(displayAttribute.Name))
{
displayAttribute.ResourceType = null;
}
}
var metadata = metadataFactory(rewrittenAttributes);
if (metadata.DisplayName == null || metadata.DisplayName == metadata.PropertyName)
{
metadata.DisplayName = metadata.PropertyName.SplitUpperCaseToString();
}
return(metadata);
}
public void First_WithNoMatchingAttribute_ReturnsNull()
{
// arrange
var attributeProvider = new Mock<ICustomAttributeProvider>();
var attribute = new MetadataConventionsAttribute { ResourceType = typeof(TestResources) };
attributeProvider.Setup(a => a.GetCustomAttributes(typeof(MetadataConventionsAttribute), true)).Returns(new[] { attribute });
// act
var retrievedAttribute = attributeProvider.Object.First<DisplayAttribute>();
// assert
Assert.Null(retrievedAttribute);
}
public void First_WithAttributeReturnedByAttributeProvider_ReturnsAttribute()
{
// arrange
var attributeProvider = new Mock<ICustomAttributeProvider>();
var attribute = new MetadataConventionsAttribute { ResourceType = typeof(TestResources) };
attributeProvider.Setup(a => a.GetCustomAttributes(typeof(MetadataConventionsAttribute), true)).Returns(new[] { attribute });
// act
var retrievedAttribute = attributeProvider.Object.First<MetadataConventionsAttribute>();
// assert
Assert.Equal(typeof(TestResources), retrievedAttribute.ResourceType);
}
