Struct EmptySubscription

pub struct EmptySubscription<T: ?Sized = ()>(/* private fields */);

Utillity type to define read-only schemas

If you instantiate RootNode with this as the subscription, no subscriptions will be generated for the schema.

Implementations

impl<T: ?Sized> EmptySubscription<T>

pub fn new() -> Self

Construct a new empty subscription

Trait Implementations

impl<T> Default for EmptySubscription<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T, S> GraphQLSubscriptionValue<S> for EmptySubscription<T>

where Self::TypeInfo: Sync, Self::Context: Sync, S: ScalarValue + Send + Sync + 'static,

fn resolve_into_stream<'s, 'i, 'ref_e, 'e, 'res, 'f>( &'s self, info: &'i Self::TypeInfo, executor: &'ref_e Executor<'ref_e, 'e, Self::Context, S>, ) -> BoxFuture<'f, Result<Value<ValuesStream<'res, S>>, FieldError<S>>>

where 'e: 'res, 'i: 'res, 's: 'f, 'ref_e: 'f, 'res: 'f,

Resolves into Value<ValuesStream>.

fn resolve_field_into_stream<'s, 'i, 'ft, 'args, 'e, 'ref_e, 'res, 'f>( &'s self, _: &'i Self::TypeInfo, _: &'ft str, _: Arguments<'args, S>, _: &'ref_e Executor<'ref_e, 'e, Self::Context, S>, ) -> BoxFuture<'f, Result<Value<ValuesStream<'res, S>>, FieldError<S>>>

where 's: 'f, 'i: 'res, 'ft: 'f, 'args: 'f, 'ref_e: 'f, 'res: 'f, 'e: 'res,

This method is called by Self’s resolve_into_stream default implementation every time any field is found in selection set.

fn resolve_into_type_stream<'s, 'i, 'tn, 'e, 'ref_e, 'res, 'f>( &'s self, info: &'i Self::TypeInfo, type_name: &'tn str, executor: &'ref_e Executor<'ref_e, 'e, Self::Context, S>, ) -> BoxFuture<'f, Result<Value<ValuesStream<'res, S>>, FieldError<S>>>

where 'i: 'res, 'e: 'res, 's: 'f, 'tn: 'f, 'ref_e: 'f, 'res: 'f,

This method is called by Self’s resolve_into_stream default implementation every time any fragment is found in selection set.

impl<S, T> GraphQLType<S> for EmptySubscription<T>

where S: ScalarValue,

fn name(_: &()) -> Option<&'static str>

Returns name of this GraphQLType to expose.

fn meta<'r>(_: &(), registry: &mut Registry<'r, S>) -> MetaType<'r, S>

where S: 'r,

Returns MetaType representing this GraphQLType.

impl<S, T> GraphQLValue<S> for EmptySubscription<T>

where S: ScalarValue,

type Context = T

Context type for this GraphQLValue.

type TypeInfo = ()

Type that may carry additional schema information for this GraphQLValue.

fn type_name<'i>(&self, info: &'i Self::TypeInfo) -> Option<&'i str>

Returns name of the GraphQLType exposed by this GraphQLValue.

fn resolve_field( &self, _info: &Self::TypeInfo, _field_name: &str, _arguments: &Arguments<'_, S>, _executor: &Executor<'_, '_, Self::Context, S>, ) -> ExecutionResult<S>

Resolves the value of a single field on this GraphQLValue.

fn resolve_into_type( &self, info: &Self::TypeInfo, type_name: &str, selection_set: Option<&[Selection<'_, S>]>, executor: &Executor<'_, '_, Self::Context, S>, ) -> ExecutionResult<S>

Resolves this GraphQLValue (being an interface or an union) into a concrete downstream object type.

fn concrete_type_name( &self, context: &Self::Context, info: &Self::TypeInfo, ) -> String

Returns the concrete GraphQLType name for this GraphQLValue being an interface, an union or an object.

fn resolve( &self, info: &Self::TypeInfo, selection_set: Option<&[Selection<'_, S>]>, executor: &Executor<'_, '_, Self::Context, S>, ) -> ExecutionResult<S>

Resolves the provided selection_set against this GraphQLValue.