Trait mongod::AsField [−][src]
Expand description
Used to tie a type implementing Collection
to its companion Field
type.
Example
Defining an enum
as a set of fields for use in a mongo query.
use mongod::{AsField, Field}; #[derive(Bson, Mongo)] #[mongo(collection="users")] pub struct User { pub name: String, } impl AsField<UserField> for User {} pub enum UserField { Name, } impl Field for UserField {} impl From<UserField> for String { fn from(field: UserField) -> String { match field { UserField::Name => "name".to_owned(), } } }