About
Schema Introspection (ie querying the Schema and not the data)
Example: graphql/graphql-js/blob/master/src/__tests__/starWarsIntrospection-test.js
The introspection file in GraphQL.js contains code implementing a specification-compliant GraphQL query introspection system
Management
See
We can ask GraphQL, by querying the __schema field, always available on the root type of a Query.
Example:
query IntrospectionTypeQuery {
__schema {
types {
name
}
}
}
and we get all the types with the name field.
{
"__schema": {
"types": [
{
"name": "Query"
},
{
"name": "Character"
},
{
"name": "Human"
},
....
]
}
}
Built-in type
- __Schema, __Type, __TypeKind, __Field, __InputValue, __EnumValue, __Directive preceded with a double underscore, indicating that they are part of the introspection system.