metadata property types

Right now the metadata describes a property type (string, int, etc) as a kind. This is a little overloaded with the concept of a Kind in datastore. Perhaps these could all be called type instead? Then metadata would look like:

registerKind('namespace', 'Author', {
    name: { type: STRING, indexed: false },
    tags: { type: STRING, multi: true }, // an array of string elements.
    favArticles: { type: KEY, multi: true }
    contact: {
        kind: {
          telephone: { type: STRING },
          email: { type: STRING }
        }
    }
});

Agreed, I will replace kind with type when we support schema.

datastore: support kind schema. fixes googleapis#85 googleapis#86

@pcostell

@pcostell obviously, a lot has changed over the last 15 months. Is there anything for me to do here?

I don't think so. Did this metadata registration ever make it into the project?

Nope. In general, our library is pretty relaxed when it comes to types and validation and such. Beyond common utilities, we leave it to the user to create helpers where they make sense given their own projects and workflows. Then, where applicable, we let the API catch any errors from input mismatches.

Datastore is arguably the most complex API we support, so I can see how it could be valuable in this case, however. What do you think? Would the majority of codebases using Datastore benefit from this concept?

I think that would be more beneficial for a higher level, maybe 3rd party library. Or even some sort of adapter to an existing framework. I think keeping the gcloud API relatively simple is better.