On the server, add logic to the Metadata controller action to supplement the standard metadata with the display attribute properties:
[HttpGet]
public virtual string Metadata()
{
// Extend metadata with extra attributes
var metadata = JObject.Parse(this.ContextProvider.Metadata());
var ns = metadata["schema"]["namespace"].ToString();
foreach (var breezeEntityType in metadata["schema"]["entityType"])
{
var typeName = ns + "." + breezeEntityType["name"].ToString();
var entityType = BuildManager.GetType(typeName, true);
foreach (var propertyInfo in entityType.GetProperties())
{
var attributes = propertyInfo.GetAllAttributes();
var breezePropertyInfo = breezeEntityType["property"].SingleOrDefault(p => p["name"].ToString() == propertyInfo.Name);
if (breezePropertyInfo == null)
continue;
// handle display attribute...
var displayAttribute = attributes.OfType<DisplayAttribute>().FirstOrDefault();
if (displayAttribute != null)
{
var displayName = displayAttribute.GetName();
if (displayName != null)
breezePropertyInfo["displayName"] = displayName;
var displayOrder = displayAttribute.GetOrder();
if (displayOrder != null)
breezePropertyInfo["displayOrder"] = displayOrder;
var autogenerateField = displayAttribute.GetAutoGenerateField();
if (autogenerateField != null)
breezePropertyInfo["autoGenerateField"] = autogenerateField;
}
// allowEmptyStrings.
if (propertyInfo.PropertyType == typeof(string))
{
breezePropertyInfo["allowEmptyStrings"] = true;
var requiredAttribute = attributes.OfType<RequiredAttribute>().FirstOrDefault();
if (requiredAttribute != null && !requiredAttribute.AllowEmptyStrings)
breezePropertyInfo["allowEmptyStrings"] = false;
}
// todo: handle other types of attributes...
}
}
return metadata.ToString();
}
On the client, fetch the metadata and supplement the breeze entity type with the custom metadata.
function initializeMetadataStore(metadataStore, metadata) {
var metadataType, metadataProperty, entityProperty, i, j;
for (i = 0; i < metadata.schema.entityType.length; i++) {
metadataType = metadata.schema.entityType[i];
var entityType = metadataStore.getEntityType(metadataType.name);
for (j = 0; j < metadataType.property.length; j++) {
metadataProperty = metadataType.property[j];
entityProperty = entityType.getProperty(metadataProperty.name);
if (entityProperty) {
if (typeof metadataProperty.displayName !== 'undefined') {
entityProperty.displayName = metadataProperty.displayName;
}
if (typeof metadataProperty.displayOrder !== 'undefined') {
entityProperty.displayOrder = metadataProperty.displayOrder;
}
if (typeof metadataProperty.autoGenerateField !== 'undefined') {
entityProperty.autoGenerateField = metadataProperty.autoGenerateField;
}
if (typeof metadataProperty.allowEmptyStrings !== 'undefined') {
entityProperty.allowEmptyStrings = metadataProperty.allowEmptyStrings;
}
}
}
}
}
var entityManager = ....something...;
entityManager.fetchMetadata(function (metadata) {
return initializeMetadataStore(entityManager.metadataStore, metadata);
});
now the additional metadata is available in the breeze entity type...
var propertyDisplayName = myEntity.entityType.getProperty('lastName').displayName;
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