Objects and paths​

All queries on this page assume the following schema.

module default {
  type Account {
    required property username -> str {
      constraint exclusive;
    };
    multi link watchlist -> Media;
  }
  type Person {
    required property name -> str;
  }
  abstract type Media {
    required property title -> str;
    multi link cast -> Person {
      property character_name -> str;
    };
  }
  type Movie extending Media {
    property runtime -> duration;
  }
  type TVShow extending Media {
    property number_of_seasons -> int64;
  }
}

Object types​

All object types in your schema are reflected into the query builder, properly namespaced by module.

e.default.Person;
e.default.Movie;
e.default.TVShow;
e.my_module.SomeType;

For convenience, the contents of the default module are also available at the top-level of e.

e.Person;
e.Movie;
e.TVShow;

Paths​

EdgeQL-style paths are supported on object type references.

e.Person.name;              // Person.name
e.Movie.title;              // Movie.title
e.TVShow.cast.name;          // Movie.cast.name

Paths can be constructed from any object expression, not just the root types.

e.select(e.Person).name;
// (select Person).name
e.op(e.Movie, 'union', e.TVShow).cast;
// (Movie union TVShow).cast
const ironMan = e.insert(e.Movie, {
  title: "Iron Man"
});
ironMan.title;
// (insert Movie { title := "Iron Man" }).title

Type intersections​

Use the type intersection operator to narrow the type of a set of objects. For instance, to represent the elements of an Account’s watchlist that are of type TVShow:

e.Person.acted_in.is(e.TVShow);
// Person.acted_in[is TVShow]

Backlinks​

All possible backlinks are auto-generated and can be auto-completed by TypeScript. They behave just like forward links. However, because they contain special characters, you must use bracket syntax instead of simple dot notation.

e.Person["<directed[is Movie]"]
// Person.<directed[is Movie]

For convenience, these backlinks automatically combine the backlink operator and type intersection into a single key. However, the query builder also provides “naked” backlinks; these can be refined with the .is type intersection method.

e.Person['<directed'].is(e.Movie);
// Person.<directed[is Movie]