Struct Node 

pub struct Node<RequestCtx>
where
    RequestCtx: Debug + RequestContext,
{ /* private fields */ }

Represents a node in the graph data structure for auto-generated CRUD operations and custom resolvers.

Examples

fn custom_resolve(facade: ResolverFacade<()>) -> BoxFuture<ExecutionResult> {
    Box::pin(async move {
        let typename = "User";

        let mut props = HashMap::new();
        props.insert("role".to_string(), Value::String("Admin".to_string()));

        let n = facade.node(typename, props);

        facade.resolve_node(&n).await
    })
}

Implementations

impl<RequestCtx> Node<RequestCtx>

where RequestCtx: RequestContext,

pub fn new( concrete_typename: String, fields: HashMap<String, Value>, ) -> Node<RequestCtx>

pub fn deser<T: DeserializeOwned>(&self) -> Result<T, Error>

Attempts to deserialize a Node into a struct.

Example

#[derive(Deserialize)]
struct Team {
    name: String
}

fn handle_node(n: Node<()>) {

    // succeeds if the fields of `n` can be deserialized into `Team`
    let team: Team = n.deser().unwrap();
     
}

pub fn fields(&self) -> &HashMap<String, Value>

Returns the fields of a Node.

Example

use warpgrapher::engine::objects::Node;

fn handle_node(n: Node<()>) {
    let properties = n.fields();
}

pub fn id(&self) -> Result<&Value, Error>

pub fn type_name(&self) -> &String

Trait Implementations

impl<RequestCtx> Clone for Node<RequestCtx>

where RequestCtx: Debug + RequestContext + Clone,

fn clone(&self) -> Node<RequestCtx>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<RequestCtx> Debug for Node<RequestCtx>

where RequestCtx: Debug + RequestContext + Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<RequestCtx> GraphQLType for Node<RequestCtx>

where RequestCtx: RequestContext,

fn name(info: &Self::TypeInfo) -> Option<&str>

Returns name of this GraphQLType to expose.

fn meta<'r>(info: &Self::TypeInfo, registry: &mut Registry<'r>) -> MetaType<'r>

where DefaultScalarValue: 'r,

Returns MetaType representing this GraphQLType.

impl<RequestCtx> GraphQLValue for Node<RequestCtx>

where RequestCtx: RequestContext,

type Context = GraphQLContext<RequestCtx>

Context type for this GraphQLValue.

type TypeInfo = Info

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 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_field( &self, _info: &Self::TypeInfo, _field_name: &str, _arguments: &Arguments<'_, S>, _executor: &Executor<'_, '_, Self::Context, S>, ) -> Result<Value<S>, FieldError<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>, ) -> Result<Value<S>, FieldError<S>>

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

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

Resolves the provided selection_set against this GraphQLValue.

impl<RequestCtx> GraphQLValueAsync for Node<RequestCtx>

where RequestCtx: RequestContext,

fn resolve_field_async<'a>( &'a self, info: &'a Self::TypeInfo, field_name: &'a str, args: &'a Arguments<'_>, executor: &'a Executor<'_, '_, Self::Context>, ) -> BoxFuture<'a, ExecutionResult>

Resolves the value of a single field on this GraphQLValueAsync.

fn resolve_into_type_async<'a>( &'a self, info: &'a Self::TypeInfo, type_name: &str, _selection_set: Option<&'a [Selection<'a>]>, executor: &'a Executor<'a, 'a, Self::Context>, ) -> BoxFuture<'a, ExecutionResult>

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

fn resolve_async<'a>( &'a self, info: &'a Self::TypeInfo, selection_set: Option<&'a [Selection<'_, S>]>, executor: &'a Executor<'_, '_, Self::Context, S>, ) -> Pin<Box<dyn Future<Output = Result<Value<S>, FieldError<S>>> + Send + 'a>>

Resolves the provided selection_set against this GraphQLValueAsync.