如何在Golang中定义未索引的数据存储属性？

Can I define unindexed Datastore properties using Golang on app engine?

Sure, just add "noindex" to struct field tag: https://developers.google.com/appengine/docs/go/datastore/indexes#Go_Unindexed_properties

You can control how Datastore handles struct fields using struct tags. To avoid indexing a field, do the following:

type Person struct { Age int `datastore:",noindex"` }

See the documentation for more information.