How does one access and bind the entity meta-data (through JavaScript on the client) available from Upshot?

Question

One of the supposed benefits of Upshot is its ability to query meta-data exposed through Data Annotations. How would one access meta-data for entity properties for things like string length, default values, display name, description information, and whether a field is required?

How would connect this data into a validation framwork like jQuery Validation or Knockout Validation?

Note: I am currently using Knockout 2.1.0, Upshot 1.0.0.2, Entity Framework 4.3, and ASP.NET MVC4.

Answer 1

You can use the upshot function metadata() to access this information, for example:

If you have the following upshot registration:

@(Html.UpshotContext(bufferChanges: true)
    .DataSource<App.Controllers.DBController>(x => x.GetUsers())
    .ClientMapping<App.Models.User>("User")
)

you can access the metadata (and validation rules) like this:

var metadata = upshot.metadata(upshot.type(User));

you can also retrieve information about properties (eg. "Name"):

var propertyType = upshot.metadata.getPropertyType(upshot.type(User), "Name");