Introspection

Subtopics

EdgeQL Tutorial

Introspection

All objects in EdgeDB have a __type__ link which points to the schema type that the object is actually implementing. This can be used for introspection queries or to just add the object type information to a query. Let's fetch all media with their ids and corresponding types:

Input

SELECT Media {
    id,
    __type__: {
        name
    }
};

SELECT Media {
    id,
    __type__: {
        name
    }
};

Run

Output

Press the 'Run' button to evaluate the input

Note that this is different from INTROSPECT as it provides run-time type information for concrete objects, whereas the INTROSPECT expression is resolving types statically. Compare this usage of INTROSPECT to the previous query:

Input

SELECT INTROSPECT Media {
    name
};

SELECT INTROSPECT Media {
    name
};

Run

Output

Press the 'Run' button to evaluate the input

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