Struct async_graphql::Error
source · pub struct Error {
pub message: String,
pub source: Option<Arc<dyn Any + Send + Sync>>,
pub extensions: Option<ErrorExtensionValues>,
}Expand description
An error with a message and optional extensions.
Fields§
§message: StringThe error message.
source: Option<Arc<dyn Any + Send + Sync>>The source of the error.
extensions: Option<ErrorExtensionValues>Extensions to the error.
Implementations§
source§impl Error
impl Error
sourcepub fn new(message: impl Into<String>) -> Self
pub fn new(message: impl Into<String>) -> Self
Create an error from the given error message.
Examples found in repository?
src/dynamic/field.rs (line 188)
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pub fn try_to_value(&self) -> Result<&Value> {
self.as_value()
.ok_or_else(|| Error::new("internal: not a Value"))
}
/// If the FieldValue is a list, returns the associated
/// vector. Returns `None` otherwise.
#[inline]
pub fn as_list(&self) -> Option<&[FieldValue]> {
match &self.0 {
FieldValueInner::List(values) => Some(values),
_ => None,
}
}
/// Like `as_list`, but returns `Result`.
#[inline]
pub fn try_to_list(&self) -> Result<&[FieldValue]> {
self.as_list()
.ok_or_else(|| Error::new("internal: not a list"))
}
/// If the FieldValue is a any, returns the associated
/// vector. Returns `None` otherwise.
#[inline]
pub fn downcast_ref<T: Any>(&self) -> Option<&T> {
match &self.0 {
FieldValueInner::BorrowedAny(value) => value.downcast_ref::<T>(),
FieldValueInner::OwnedAny(value) => value.downcast_ref::<T>(),
_ => None,
}
}
/// Like `downcast_ref`, but returns `Result`.
#[inline]
pub fn try_downcast_ref<T: Any>(&self) -> Result<&T> {
self.downcast_ref().ok_or_else(|| {
Error::new(format!(
"internal: not type \"{}\"",
std::any::type_name::<T>()
))
})
}More examples
src/dynamic/value_accessor.rs (line 22)
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pub fn boolean(&self) -> Result<bool> {
match self.0 {
Value::Boolean(b) => Ok(*b),
_ => Err(Error::new("internal: not a boolean")),
}
}
/// Returns the enum name
pub fn enum_name(&self) -> Result<&str> {
match self.0 {
Value::Enum(s) => Ok(s),
Value::String(s) => Ok(s.as_str()),
_ => Err(Error::new("internal: not an enum name")),
}
}
/// Returns the number as `i64`
pub fn i64(&self) -> Result<i64> {
if let Value::Number(number) = self.0 {
if let Some(value) = number.as_i64() {
return Ok(value);
}
}
Err(Error::new("internal: not an signed integer"))
}
/// Returns the number as `u64`
pub fn u64(&self) -> Result<u64> {
if let Value::Number(number) = self.0 {
if let Some(value) = number.as_u64() {
return Ok(value);
}
}
Err(Error::new("internal: not an unsigned integer"))
}
/// Returns the number as `f32`
pub fn f32(&self) -> Result<f32> {
if let Value::Number(number) = self.0 {
if let Some(value) = number.as_f64() {
return Ok(value as f32);
}
}
Err(Error::new("internal: not a float"))
}
/// Returns the number as `f64`
pub fn f64(&self) -> Result<f64> {
if let Value::Number(number) = self.0 {
if let Some(value) = number.as_f64() {
return Ok(value);
}
}
Err(Error::new("internal: not a float"))
}
/// Returns the string value
pub fn string(&self) -> Result<&str> {
if let Value::String(value) = self.0 {
Ok(value)
} else {
Err(Error::new("internal: not a string"))
}
}
/// Returns the object accessor
pub fn object(&self) -> Result<ObjectAccessor<'_>> {
if let Value::Object(obj) = self.0 {
Ok(ObjectAccessor(Cow::Borrowed(obj)))
} else {
Err(Error::new("internal: not a string"))
}
}
/// Returns the list accessor
pub fn list(&self) -> Result<ListAccessor<'_>> {
if let Value::List(list) = self.0 {
Ok(ListAccessor(list))
} else {
Err(Error::new("internal: not a list"))
}
}
/// Deserialize the value to `T`
pub fn deserialize<T: DeserializeOwned>(&self) -> Result<T> {
T::deserialize(self.0.clone()).map_err(|err| format!("internal: {}", err).into())
}
}
/// A object accessor
pub struct ObjectAccessor<'a>(pub(crate) Cow<'a, IndexMap<Name, Value>>);
impl<'a> ObjectAccessor<'a> {
/// Return a reference to the value stored for `key`, if it is present,
/// else `None`.
#[inline]
pub fn get(&'a self, name: &str) -> Option<ValueAccessor<'a>> {
self.0.get(name).map(ValueAccessor)
}
/// Like [`ObjectAccessor::get`], returns `Err` if the index does not exist
#[inline]
pub fn try_get(&'a self, name: &str) -> Result<ValueAccessor<'a>> {
self.0
.get(name)
.map(ValueAccessor)
.ok_or_else(|| Error::new(format!("internal: key \"{}\" not found", name)))
}
/// Return an iterator over the key-value pairs of the object, in their
/// order
#[inline]
pub fn iter(&'a self) -> impl Iterator<Item = (&Name, ValueAccessor<'_>)> + 'a {
self.0
.iter()
.map(|(name, value)| (name, ValueAccessor(value)))
}
}
/// A list accessor
pub struct ListAccessor<'a>(pub(crate) &'a [Value]);
impl<'a> ListAccessor<'a> {
/// Returns the number of elements in the list
#[inline]
pub fn len(&self) -> usize {
self.0.len()
}
/// Returns `true` if the list has a length of 0
#[inline]
pub fn is_empty(&self) -> bool {
self.0.is_empty()
}
/// Returns an iterator over the list
#[inline]
pub fn iter(&'a self) -> impl Iterator<Item = ValueAccessor<'_>> + 'a {
self.0.iter().map(ValueAccessor)
}
/// Returns a reference to an element depending on the index
#[inline]
pub fn get(&self, idx: usize) -> Option<ValueAccessor<'a>> {
self.0.get(idx).map(ValueAccessor)
}
/// Like [`ListAccessor::get`], returns `Err` if the index does not exist
#[inline]
pub fn try_get(&self, idx: usize) -> Result<ValueAccessor<'a>> {
self.get(idx)
.ok_or_else(|| Error::new(format!("internal: index \"{}\" not found", idx)))
}src/http/websocket.rs (lines 206-208)
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fn poll_next(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
let mut this = self.project();
if this.init_fut.is_none() {
while let Poll::Ready(message) = Pin::new(&mut this.stream).poll_next(cx) {
let message = match message {
Some(message) => message,
None => return Poll::Ready(None),
};
let message: ClientMessage = match message {
Ok(message) => message,
Err(err) => return Poll::Ready(Some(WsMessage::Close(1002, err.to_string()))),
};
match message {
ClientMessage::ConnectionInit { payload } => {
if let Some(on_connection_init) = this.on_connection_init.take() {
*this.init_fut = Some(Box::pin(async move {
on_connection_init(payload.unwrap_or_default()).await
}));
break;
} else {
match this.protocol {
Protocols::SubscriptionsTransportWS => {
return Poll::Ready(Some(WsMessage::Text(
serde_json::to_string(&ServerMessage::ConnectionError {
payload: Error::new(
"Too many initialisation requests.",
),
})
.unwrap(),
)));
}
Protocols::GraphQLWS => {
return Poll::Ready(Some(WsMessage::Close(
4429,
"Too many initialisation requests.".to_string(),
)));
}
}
}
}
ClientMessage::Start {
id,
payload: request,
} => {
if let Some(data) = this.data.clone() {
this.streams.insert(
id,
Box::pin(this.executor.execute_stream(request, Some(data))),
);
} else {
return Poll::Ready(Some(WsMessage::Close(
1011,
"The handshake is not completed.".to_string(),
)));
}
}
ClientMessage::Stop { id } => {
if this.streams.remove(&id).is_some() {
return Poll::Ready(Some(WsMessage::Text(
serde_json::to_string(&ServerMessage::Complete { id: &id })
.unwrap(),
)));
}
}
// Note: in the revised `graphql-ws` spec, there is no equivalent to the
// `CONNECTION_TERMINATE` `client -> server` message; rather, disconnection is
// handled by disconnecting the websocket
ClientMessage::ConnectionTerminate => return Poll::Ready(None),
// Pong must be sent in response from the receiving party as soon as possible.
ClientMessage::Ping { .. } => {
return Poll::Ready(Some(WsMessage::Text(
serde_json::to_string(&ServerMessage::Pong { payload: None }).unwrap(),
)));
}
ClientMessage::Pong { .. } => {
// Do nothing...
}
}
}
}
if let Some(init_fut) = this.init_fut {
if let Poll::Ready(res) = init_fut.poll_unpin(cx) {
*this.init_fut = None;
return match res {
Ok(data) => {
let mut ctx_data = this.connection_data.take().unwrap_or_default();
ctx_data.merge(data);
*this.data = Some(Arc::new(ctx_data));
Poll::Ready(Some(WsMessage::Text(
serde_json::to_string(&ServerMessage::ConnectionAck).unwrap(),
)))
}
Err(err) => match this.protocol {
Protocols::SubscriptionsTransportWS => Poll::Ready(Some(WsMessage::Text(
serde_json::to_string(&ServerMessage::ConnectionError {
payload: Error::new(err.message),
})
.unwrap(),
))),
Protocols::GraphQLWS => {
Poll::Ready(Some(WsMessage::Close(1002, err.message)))
}
},
};
}
}
for (id, stream) in &mut *this.streams {
match Pin::new(stream).poll_next(cx) {
Poll::Ready(Some(payload)) => {
return Poll::Ready(Some(WsMessage::Text(
serde_json::to_string(&this.protocol.next_message(id, payload)).unwrap(),
)));
}
Poll::Ready(None) => {
let id = id.clone();
this.streams.remove(&id);
return Poll::Ready(Some(WsMessage::Text(
serde_json::to_string(&ServerMessage::Complete { id: &id }).unwrap(),
)));
}
Poll::Pending => {}
}
}
Poll::Pending
}
}
/// Specification of which GraphQL Over WebSockets protocol is being utilized
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub enum Protocols {
/// [subscriptions-transport-ws protocol](https://github.com/apollographql/subscriptions-transport-ws/blob/master/PROTOCOL.md).
SubscriptionsTransportWS,
/// [graphql-ws protocol](https://github.com/enisdenjo/graphql-ws/blob/master/PROTOCOL.md).
GraphQLWS,
}
impl Protocols {
/// Returns the `Sec-WebSocket-Protocol` header value for the protocol
pub fn sec_websocket_protocol(&self) -> &'static str {
match self {
Protocols::SubscriptionsTransportWS => "graphql-ws",
Protocols::GraphQLWS => "graphql-transport-ws",
}
}
#[inline]
fn next_message<'s>(&self, id: &'s str, payload: Response) -> ServerMessage<'s> {
match self {
Protocols::SubscriptionsTransportWS => ServerMessage::Data { id, payload },
Protocols::GraphQLWS => ServerMessage::Next { id, payload },
}
}
}
impl std::str::FromStr for Protocols {
type Err = Error;
fn from_str(protocol: &str) -> Result<Self, Self::Err> {
if protocol.eq_ignore_ascii_case("graphql-ws") {
Ok(Protocols::SubscriptionsTransportWS)
} else if protocol.eq_ignore_ascii_case("graphql-transport-ws") {
Ok(Protocols::GraphQLWS)
} else {
Err(Error::new(format!(
"Unsupported Sec-WebSocket-Protocol: {}",
protocol
)))
}
}src/dynamic/resolve.rs (line 171)
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fn collect_fields<'a>(
fields: &mut Vec<BoxFieldFuture<'a>>,
schema: &'a Schema,
object: &'a Object,
ctx: &ContextSelectionSet<'a>,
parent_value: &'a FieldValue,
) -> ServerResult<()> {
for selection in &ctx.item.node.items {
match &selection.node {
Selection::Field(field) => {
if field.node.name.node == "__typename" {
if matches!(
ctx.schema_env.registry.introspection_mode,
IntrospectionMode::Enabled | IntrospectionMode::IntrospectionOnly
) && matches!(
ctx.query_env.introspection_mode,
IntrospectionMode::Enabled | IntrospectionMode::IntrospectionOnly,
) {
fields.push(
async move {
Ok((
field.node.response_key().node.clone(),
Value::from(object.name.as_str()),
))
}
.boxed(),
)
} else {
fields.push(
async move { Ok((field.node.response_key().node.clone(), Value::Null)) }.boxed(),
)
}
continue;
}
if object.name == schema.0.env.registry.query_type
&& matches!(
ctx.schema_env.registry.introspection_mode,
IntrospectionMode::Enabled | IntrospectionMode::IntrospectionOnly
)
&& matches!(
ctx.query_env.introspection_mode,
IntrospectionMode::Enabled | IntrospectionMode::IntrospectionOnly,
)
{
// is query root
if field.node.name.node == "__schema" {
let ctx = ctx.clone();
fields.push(
async move {
let ctx_field = ctx.with_field(field);
let mut ctx_obj =
ctx.with_selection_set(&ctx_field.item.node.selection_set);
ctx_obj.is_for_introspection = true;
let visible_types =
ctx.schema_env.registry.find_visible_types(&ctx_field);
let value = crate::OutputType::resolve(
&crate::model::__Schema::new(
&ctx.schema_env.registry,
&visible_types,
),
&ctx_obj,
ctx_field.item,
)
.await?;
Ok((field.node.response_key().node.clone(), value))
}
.boxed(),
);
continue;
} else if field.node.name.node == "__type" {
let ctx = ctx.clone();
fields.push(
async move {
let ctx_field = ctx.with_field(field);
let (_, type_name) =
ctx_field.param_value::<String>("name", None)?;
let mut ctx_obj =
ctx.with_selection_set(&ctx_field.item.node.selection_set);
ctx_obj.is_for_introspection = true;
let visible_types =
ctx.schema_env.registry.find_visible_types(&ctx_field);
let value = crate::OutputType::resolve(
&ctx.schema_env
.registry
.types
.get(&type_name)
.filter(|_| visible_types.contains(type_name.as_str()))
.map(|ty| {
crate::model::__Type::new_simple(
&ctx.schema_env.registry,
&visible_types,
ty,
)
}),
&ctx_obj,
ctx_field.item,
)
.await?;
Ok((field.node.response_key().node.clone(), value))
}
.boxed(),
);
continue;
} else if ctx.schema_env.registry.enable_federation
&& field.node.name.node == "_service"
{
let sdl = ctx
.schema_env
.registry
.export_sdl(SDLExportOptions::new().federation());
fields.push(
async move {
Ok((field.node.response_key().node.clone(), Value::from(sdl)))
}
.boxed(),
);
continue;
} else if ctx.schema_env.registry.enable_federation
&& field.node.name.node == "_entities"
{
let ctx = ctx.clone();
fields.push(
async move {
let ctx_field = ctx.with_field(field);
let entity_resolver =
schema.0.entity_resolver.as_ref().ok_or_else(|| {
ctx_field.set_error_path(
Error::new("internal: missing entity resolver")
.into_server_error(ctx_field.item.pos),
)
})?;
let entity_type = TypeRef::named_list_nn("_Entity");
let arguments = ObjectAccessor(Cow::Owned(
field
.node
.arguments
.iter()
.map(|(name, value)| {
ctx_field
.resolve_input_value(value.clone())
.map(|value| (name.node.clone(), value))
})
.collect::<ServerResult<IndexMap<Name, Value>>>()?,
));
let field_value = (entity_resolver)(ResolverContext {
ctx: &ctx_field,
args: arguments,
parent_value,
})
.0
.await
.map_err(|err| err.into_server_error(field.pos))?;
let value = resolve(
schema,
&ctx_field,
&entity_type.0,
field_value.as_ref(),
)
.await?
.unwrap_or_default();
Ok((field.node.response_key().node.clone(), value))
}
.boxed(),
);
continue;
}
}
if ctx.schema_env.registry.introspection_mode
== IntrospectionMode::IntrospectionOnly
|| ctx.query_env.introspection_mode == IntrospectionMode::IntrospectionOnly
{
fields.push(
async move { Ok((field.node.response_key().node.clone(), Value::Null)) }
.boxed(),
);
continue;
}
if let Some(field_def) = object.fields.get(field.node.name.node.as_str()) {
let ctx = ctx.clone();
fields.push(
async move {
let ctx_field = ctx.with_field(field);
let arguments = ObjectAccessor(Cow::Owned(
field
.node
.arguments
.iter()
.map(|(name, value)| {
ctx_field
.resolve_input_value(value.clone())
.map(|value| (name.node.clone(), value))
})
.collect::<ServerResult<IndexMap<Name, Value>>>()?,
));
let resolve_info = ResolveInfo {
path_node: ctx_field.path_node.as_ref().unwrap(),
parent_type: &object.name,
return_type: &field_def.ty.to_string(),
name: &field.node.name.node,
alias: field.node.alias.as_ref().map(|alias| &*alias.node),
is_for_introspection: ctx_field.is_for_introspection,
};
let resolve_fut = async {
let field_value = (field_def.resolver_fn)(ResolverContext {
ctx: &ctx_field,
args: arguments,
parent_value,
})
.0
.await
.map_err(|err| err.into_server_error(field.pos))?;
let value = resolve(
schema,
&ctx_field,
&field_def.ty.0,
field_value.as_ref(),
)
.await?;
Ok(value)
};
futures_util::pin_mut!(resolve_fut);
let res_value = ctx_field
.query_env
.extensions
.resolve(resolve_info, &mut resolve_fut)
.await?
.unwrap_or_default();
Ok((field.node.response_key().node.clone(), res_value))
}
.boxed(),
);
}
}
selection => {
let (type_condition, selection_set) = match selection {
Selection::Field(_) => unreachable!(),
Selection::FragmentSpread(spread) => {
let fragment = ctx.query_env.fragments.get(&spread.node.fragment_name.node);
let fragment = match fragment {
Some(fragment) => fragment,
None => {
return Err(ServerError::new(
format!(
"Unknown fragment \"{}\".",
spread.node.fragment_name.node
),
Some(spread.pos),
));
}
};
(
Some(&fragment.node.type_condition),
&fragment.node.selection_set,
)
}
Selection::InlineFragment(fragment) => (
fragment.node.type_condition.as_ref(),
&fragment.node.selection_set,
),
};
let type_condition =
type_condition.map(|condition| condition.node.on.node.as_str());
let introspection_type_name = &object.name;
if type_condition.is_none() || type_condition == Some(introspection_type_name) {
collect_fields(
fields,
schema,
object,
&ctx.with_selection_set(selection_set),
parent_value,
)?;
}
}
}
}
Ok(())
}
pub(crate) fn resolve<'a>(
schema: &'a Schema,
ctx: &'a Context<'a>,
type_ref: &'a TypeRefInner,
value: Option<&'a FieldValue>,
) -> BoxFuture<'a, ServerResult<Option<Value>>> {
async move {
match (type_ref, value) {
(TypeRefInner::Named(type_name), Some(value)) => {
resolve_value(schema, ctx, &schema.0.types[type_name.as_ref()], value).await
}
(TypeRefInner::Named(_), None) => Ok(None),
(TypeRefInner::NonNull(type_ref), Some(value)) => {
resolve(schema, ctx, type_ref, Some(value)).await
}
(TypeRefInner::NonNull(_), None) => Err(ctx.set_error_path(
Error::new("internal: non-null types require a return value")
.into_server_error(ctx.item.pos),
)),
(TypeRefInner::List(type_ref), Some(FieldValue(FieldValueInner::List(values)))) => {
resolve_list(schema, ctx, type_ref, values).await
}
(
TypeRefInner::List(type_ref),
Some(FieldValue(FieldValueInner::Value(Value::List(values)))),
) => {
let values = values
.iter()
.cloned()
.map(FieldValue::value)
.collect::<Vec<_>>();
resolve_list(schema, ctx, type_ref, &values).await
}
(TypeRefInner::List(_), Some(_)) => Err(ctx.set_error_path(
Error::new("internal: expects an array").into_server_error(ctx.item.pos),
)),
(TypeRefInner::List(_), None) => Ok(Some(Value::List(vec![]))),
}
}
.boxed()
}
async fn resolve_list<'a>(
schema: &'a Schema,
ctx: &'a Context<'a>,
type_ref: &'a TypeRefInner,
values: &[FieldValue<'_>],
) -> ServerResult<Option<Value>> {
let mut futures = Vec::with_capacity(values.len());
for (idx, value) in values.iter().enumerate() {
let ctx_item = ctx.with_index(idx);
futures.push(async move {
let parent_type = format!("[{}]", type_ref);
let return_type = type_ref.to_string();
let resolve_info = ResolveInfo {
path_node: ctx_item.path_node.as_ref().unwrap(),
parent_type: &parent_type,
return_type: &return_type,
name: ctx.item.node.name.node.as_str(),
alias: ctx
.item
.node
.alias
.as_ref()
.map(|alias| alias.node.as_str()),
is_for_introspection: ctx_item.is_for_introspection,
};
let resolve_fut = async { resolve(schema, &ctx_item, type_ref, Some(value)).await };
futures_util::pin_mut!(resolve_fut);
let res_value = ctx_item
.query_env
.extensions
.resolve(resolve_info, &mut resolve_fut)
.await?;
Ok::<_, ServerError>(res_value.unwrap_or_default())
});
}
let values = futures_util::future::try_join_all(futures).await?;
Ok(Some(Value::List(values)))
}
async fn resolve_value(
schema: &Schema,
ctx: &Context<'_>,
field_type: &Type,
value: &FieldValue<'_>,
) -> ServerResult<Option<Value>> {
match (field_type, &value.0) {
(Type::Scalar(scalar), FieldValueInner::Value(value)) if scalar.validate(value) => {
Ok(Some(value.clone()))
}
(Type::Scalar(scalar), _) => Err(ctx.set_error_path(
Error::new(format!(
"internal: invalid value for scalar \"{}\", expected \"FieldValue::Value\"",
scalar.name
))
.into_server_error(ctx.item.pos),
)),
(Type::Object(object), _) => {
resolve_container(
schema,
object,
&ctx.with_selection_set(&ctx.item.node.selection_set),
value,
true,
)
.await
}
(Type::InputObject(obj), _) => Err(ctx.set_error_path(
Error::new(format!(
"internal: cannot use input object \"{}\" as output value",
obj.name
))
.into_server_error(ctx.item.pos),
)),
(Type::Enum(e), FieldValueInner::Value(Value::Enum(name))) => {
if !e.enum_values.contains_key(name.as_str()) {
return Err(ctx.set_error_path(
Error::new(format!("internal: invalid item for enum \"{}\"", e.name))
.into_server_error(ctx.item.pos),
));
}
Ok(Some(Value::Enum(name.clone())))
}
(Type::Enum(e), FieldValueInner::Value(Value::String(name))) => {
if !e.enum_values.contains_key(name) {
return Err(ctx.set_error_path(
Error::new(format!("internal: invalid item for enum \"{}\"", e.name))
.into_server_error(ctx.item.pos),
));
}
Ok(Some(Value::Enum(Name::new(name))))
}
(Type::Enum(e), _) => Err(ctx.set_error_path(
Error::new(format!("internal: invalid item for enum \"{}\"", e.name))
.into_server_error(ctx.item.pos),
)),
(Type::Interface(interface), FieldValueInner::WithType { value, ty }) => {
let is_contains_obj = schema
.0
.env
.registry
.types
.get(&interface.name)
.and_then(|meta_type| {
meta_type
.possible_types()
.map(|possible_types| possible_types.contains(ty.as_ref()))
})
.unwrap_or_default();
if !is_contains_obj {
return Err(ctx.set_error_path(
Error::new(format!(
"internal: object \"{}\" does not implement interface \"{}\"",
ty, interface.name,
))
.into_server_error(ctx.item.pos),
));
}
let object_type = schema
.0
.types
.get(ty.as_ref())
.ok_or_else(|| {
ctx.set_error_path(
Error::new(format!("internal: object \"{}\" does not registered", ty))
.into_server_error(ctx.item.pos),
)
})?
.as_object()
.ok_or_else(|| {
ctx.set_error_path(
Error::new(format!("internal: type \"{}\" is not object", ty))
.into_server_error(ctx.item.pos),
)
})?;
resolve_container(
schema,
object_type,
&ctx.with_selection_set(&ctx.item.node.selection_set),
value,
true,
)
.await
}
(Type::Interface(interface), _) => Err(ctx.set_error_path(
Error::new(format!(
"internal: invalid value for interface \"{}\", expected \"FieldValue::WithType\"",
interface.name
))
.into_server_error(ctx.item.pos),
)),
(Type::Union(union), FieldValueInner::WithType { value, ty }) => {
if !union.possible_types.contains(ty.as_ref()) {
return Err(ctx.set_error_path(
Error::new(format!(
"internal: union \"{}\" does not contain object \"{}\"",
union.name, ty,
))
.into_server_error(ctx.item.pos),
));
}
let object_type = schema
.0
.types
.get(ty.as_ref())
.ok_or_else(|| {
ctx.set_error_path(
Error::new(format!("internal: object \"{}\" does not registered", ty))
.into_server_error(ctx.item.pos),
)
})?
.as_object()
.ok_or_else(|| {
ctx.set_error_path(
Error::new(format!("internal: type \"{}\" is not object", ty))
.into_server_error(ctx.item.pos),
)
})?;
resolve_container(
schema,
object_type,
&ctx.with_selection_set(&ctx.item.node.selection_set),
value,
true,
)
.await
}
(Type::Union(union), _) => Err(ctx.set_error_path(
Error::new(format!(
"internal: invalid value for union \"{}\", expected \"FieldValue::WithType\"",
union.name
))
.into_server_error(ctx.item.pos),
)),
(Type::Subscription(subscription), _) => Err(ctx.set_error_path(
Error::new(format!(
"internal: cannot use subscription \"{}\" as output value",
subscription.name
))
.into_server_error(ctx.item.pos),
)),
}
}sourcepub fn new_with_source(source: impl Display + Send + Sync + 'static) -> Self
pub fn new_with_source(source: impl Display + Send + Sync + 'static) -> Self
Create an error with a type that implements Display, and it will also
set the source of the error to this value.
sourcepub fn into_server_error(self, pos: Pos) -> ServerError
pub fn into_server_error(self, pos: Pos) -> ServerError
Convert the error to a server error.
Examples found in repository?
src/resolver_utils/container.rs (line 91)
88 89 90 91 92 93 94 95 96 97 98 99 100
async fn resolve_field(&self, ctx: &Context<'_>) -> ServerResult<Option<Value>> {
match self {
Ok(value) => T::resolve_field(value, ctx).await,
Err(err) => Err(ctx.set_error_path(err.clone().into().into_server_error(ctx.item.pos))),
}
}
async fn find_entity(&self, ctx: &Context<'_>, params: &Value) -> ServerResult<Option<Value>> {
match self {
Ok(value) => T::find_entity(value, ctx, params).await,
Err(err) => Err(ctx.set_error_path(err.clone().into().into_server_error(ctx.item.pos))),
}
}More examples
src/base.rs (line 130)
122 123 124 125 126 127 128 129 130 131 132 133
async fn resolve(
&self,
ctx: &ContextSelectionSet<'_>,
field: &Positioned<Field>,
) -> ServerResult<Value> {
match self {
Ok(value) => value.resolve(ctx, field).await,
Err(err) => {
return Err(ctx.set_error_path(err.clone().into().into_server_error(field.pos)))
}
}
}src/dynamic/resolve.rs (line 172)
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fn collect_fields<'a>(
fields: &mut Vec<BoxFieldFuture<'a>>,
schema: &'a Schema,
object: &'a Object,
ctx: &ContextSelectionSet<'a>,
parent_value: &'a FieldValue,
) -> ServerResult<()> {
for selection in &ctx.item.node.items {
match &selection.node {
Selection::Field(field) => {
if field.node.name.node == "__typename" {
if matches!(
ctx.schema_env.registry.introspection_mode,
IntrospectionMode::Enabled | IntrospectionMode::IntrospectionOnly
) && matches!(
ctx.query_env.introspection_mode,
IntrospectionMode::Enabled | IntrospectionMode::IntrospectionOnly,
) {
fields.push(
async move {
Ok((
field.node.response_key().node.clone(),
Value::from(object.name.as_str()),
))
}
.boxed(),
)
} else {
fields.push(
async move { Ok((field.node.response_key().node.clone(), Value::Null)) }.boxed(),
)
}
continue;
}
if object.name == schema.0.env.registry.query_type
&& matches!(
ctx.schema_env.registry.introspection_mode,
IntrospectionMode::Enabled | IntrospectionMode::IntrospectionOnly
)
&& matches!(
ctx.query_env.introspection_mode,
IntrospectionMode::Enabled | IntrospectionMode::IntrospectionOnly,
)
{
// is query root
if field.node.name.node == "__schema" {
let ctx = ctx.clone();
fields.push(
async move {
let ctx_field = ctx.with_field(field);
let mut ctx_obj =
ctx.with_selection_set(&ctx_field.item.node.selection_set);
ctx_obj.is_for_introspection = true;
let visible_types =
ctx.schema_env.registry.find_visible_types(&ctx_field);
let value = crate::OutputType::resolve(
&crate::model::__Schema::new(
&ctx.schema_env.registry,
&visible_types,
),
&ctx_obj,
ctx_field.item,
)
.await?;
Ok((field.node.response_key().node.clone(), value))
}
.boxed(),
);
continue;
} else if field.node.name.node == "__type" {
let ctx = ctx.clone();
fields.push(
async move {
let ctx_field = ctx.with_field(field);
let (_, type_name) =
ctx_field.param_value::<String>("name", None)?;
let mut ctx_obj =
ctx.with_selection_set(&ctx_field.item.node.selection_set);
ctx_obj.is_for_introspection = true;
let visible_types =
ctx.schema_env.registry.find_visible_types(&ctx_field);
let value = crate::OutputType::resolve(
&ctx.schema_env
.registry
.types
.get(&type_name)
.filter(|_| visible_types.contains(type_name.as_str()))
.map(|ty| {
crate::model::__Type::new_simple(
&ctx.schema_env.registry,
&visible_types,
ty,
)
}),
&ctx_obj,
ctx_field.item,
)
.await?;
Ok((field.node.response_key().node.clone(), value))
}
.boxed(),
);
continue;
} else if ctx.schema_env.registry.enable_federation
&& field.node.name.node == "_service"
{
let sdl = ctx
.schema_env
.registry
.export_sdl(SDLExportOptions::new().federation());
fields.push(
async move {
Ok((field.node.response_key().node.clone(), Value::from(sdl)))
}
.boxed(),
);
continue;
} else if ctx.schema_env.registry.enable_federation
&& field.node.name.node == "_entities"
{
let ctx = ctx.clone();
fields.push(
async move {
let ctx_field = ctx.with_field(field);
let entity_resolver =
schema.0.entity_resolver.as_ref().ok_or_else(|| {
ctx_field.set_error_path(
Error::new("internal: missing entity resolver")
.into_server_error(ctx_field.item.pos),
)
})?;
let entity_type = TypeRef::named_list_nn("_Entity");
let arguments = ObjectAccessor(Cow::Owned(
field
.node
.arguments
.iter()
.map(|(name, value)| {
ctx_field
.resolve_input_value(value.clone())
.map(|value| (name.node.clone(), value))
})
.collect::<ServerResult<IndexMap<Name, Value>>>()?,
));
let field_value = (entity_resolver)(ResolverContext {
ctx: &ctx_field,
args: arguments,
parent_value,
})
.0
.await
.map_err(|err| err.into_server_error(field.pos))?;
let value = resolve(
schema,
&ctx_field,
&entity_type.0,
field_value.as_ref(),
)
.await?
.unwrap_or_default();
Ok((field.node.response_key().node.clone(), value))
}
.boxed(),
);
continue;
}
}
if ctx.schema_env.registry.introspection_mode
== IntrospectionMode::IntrospectionOnly
|| ctx.query_env.introspection_mode == IntrospectionMode::IntrospectionOnly
{
fields.push(
async move { Ok((field.node.response_key().node.clone(), Value::Null)) }
.boxed(),
);
continue;
}
if let Some(field_def) = object.fields.get(field.node.name.node.as_str()) {
let ctx = ctx.clone();
fields.push(
async move {
let ctx_field = ctx.with_field(field);
let arguments = ObjectAccessor(Cow::Owned(
field
.node
.arguments
.iter()
.map(|(name, value)| {
ctx_field
.resolve_input_value(value.clone())
.map(|value| (name.node.clone(), value))
})
.collect::<ServerResult<IndexMap<Name, Value>>>()?,
));
let resolve_info = ResolveInfo {
path_node: ctx_field.path_node.as_ref().unwrap(),
parent_type: &object.name,
return_type: &field_def.ty.to_string(),
name: &field.node.name.node,
alias: field.node.alias.as_ref().map(|alias| &*alias.node),
is_for_introspection: ctx_field.is_for_introspection,
};
let resolve_fut = async {
let field_value = (field_def.resolver_fn)(ResolverContext {
ctx: &ctx_field,
args: arguments,
parent_value,
})
.0
.await
.map_err(|err| err.into_server_error(field.pos))?;
let value = resolve(
schema,
&ctx_field,
&field_def.ty.0,
field_value.as_ref(),
)
.await?;
Ok(value)
};
futures_util::pin_mut!(resolve_fut);
let res_value = ctx_field
.query_env
.extensions
.resolve(resolve_info, &mut resolve_fut)
.await?
.unwrap_or_default();
Ok((field.node.response_key().node.clone(), res_value))
}
.boxed(),
);
}
}
selection => {
let (type_condition, selection_set) = match selection {
Selection::Field(_) => unreachable!(),
Selection::FragmentSpread(spread) => {
let fragment = ctx.query_env.fragments.get(&spread.node.fragment_name.node);
let fragment = match fragment {
Some(fragment) => fragment,
None => {
return Err(ServerError::new(
format!(
"Unknown fragment \"{}\".",
spread.node.fragment_name.node
),
Some(spread.pos),
));
}
};
(
Some(&fragment.node.type_condition),
&fragment.node.selection_set,
)
}
Selection::InlineFragment(fragment) => (
fragment.node.type_condition.as_ref(),
&fragment.node.selection_set,
),
};
let type_condition =
type_condition.map(|condition| condition.node.on.node.as_str());
let introspection_type_name = &object.name;
if type_condition.is_none() || type_condition == Some(introspection_type_name) {
collect_fields(
fields,
schema,
object,
&ctx.with_selection_set(selection_set),
parent_value,
)?;
}
}
}
}
Ok(())
}
pub(crate) fn resolve<'a>(
schema: &'a Schema,
ctx: &'a Context<'a>,
type_ref: &'a TypeRefInner,
value: Option<&'a FieldValue>,
) -> BoxFuture<'a, ServerResult<Option<Value>>> {
async move {
match (type_ref, value) {
(TypeRefInner::Named(type_name), Some(value)) => {
resolve_value(schema, ctx, &schema.0.types[type_name.as_ref()], value).await
}
(TypeRefInner::Named(_), None) => Ok(None),
(TypeRefInner::NonNull(type_ref), Some(value)) => {
resolve(schema, ctx, type_ref, Some(value)).await
}
(TypeRefInner::NonNull(_), None) => Err(ctx.set_error_path(
Error::new("internal: non-null types require a return value")
.into_server_error(ctx.item.pos),
)),
(TypeRefInner::List(type_ref), Some(FieldValue(FieldValueInner::List(values)))) => {
resolve_list(schema, ctx, type_ref, values).await
}
(
TypeRefInner::List(type_ref),
Some(FieldValue(FieldValueInner::Value(Value::List(values)))),
) => {
let values = values
.iter()
.cloned()
.map(FieldValue::value)
.collect::<Vec<_>>();
resolve_list(schema, ctx, type_ref, &values).await
}
(TypeRefInner::List(_), Some(_)) => Err(ctx.set_error_path(
Error::new("internal: expects an array").into_server_error(ctx.item.pos),
)),
(TypeRefInner::List(_), None) => Ok(Some(Value::List(vec![]))),
}
}
.boxed()
}
async fn resolve_list<'a>(
schema: &'a Schema,
ctx: &'a Context<'a>,
type_ref: &'a TypeRefInner,
values: &[FieldValue<'_>],
) -> ServerResult<Option<Value>> {
let mut futures = Vec::with_capacity(values.len());
for (idx, value) in values.iter().enumerate() {
let ctx_item = ctx.with_index(idx);
futures.push(async move {
let parent_type = format!("[{}]", type_ref);
let return_type = type_ref.to_string();
let resolve_info = ResolveInfo {
path_node: ctx_item.path_node.as_ref().unwrap(),
parent_type: &parent_type,
return_type: &return_type,
name: ctx.item.node.name.node.as_str(),
alias: ctx
.item
.node
.alias
.as_ref()
.map(|alias| alias.node.as_str()),
is_for_introspection: ctx_item.is_for_introspection,
};
let resolve_fut = async { resolve(schema, &ctx_item, type_ref, Some(value)).await };
futures_util::pin_mut!(resolve_fut);
let res_value = ctx_item
.query_env
.extensions
.resolve(resolve_info, &mut resolve_fut)
.await?;
Ok::<_, ServerError>(res_value.unwrap_or_default())
});
}
let values = futures_util::future::try_join_all(futures).await?;
Ok(Some(Value::List(values)))
}
async fn resolve_value(
schema: &Schema,
ctx: &Context<'_>,
field_type: &Type,
value: &FieldValue<'_>,
) -> ServerResult<Option<Value>> {
match (field_type, &value.0) {
(Type::Scalar(scalar), FieldValueInner::Value(value)) if scalar.validate(value) => {
Ok(Some(value.clone()))
}
(Type::Scalar(scalar), _) => Err(ctx.set_error_path(
Error::new(format!(
"internal: invalid value for scalar \"{}\", expected \"FieldValue::Value\"",
scalar.name
))
.into_server_error(ctx.item.pos),
)),
(Type::Object(object), _) => {
resolve_container(
schema,
object,
&ctx.with_selection_set(&ctx.item.node.selection_set),
value,
true,
)
.await
}
(Type::InputObject(obj), _) => Err(ctx.set_error_path(
Error::new(format!(
"internal: cannot use input object \"{}\" as output value",
obj.name
))
.into_server_error(ctx.item.pos),
)),
(Type::Enum(e), FieldValueInner::Value(Value::Enum(name))) => {
if !e.enum_values.contains_key(name.as_str()) {
return Err(ctx.set_error_path(
Error::new(format!("internal: invalid item for enum \"{}\"", e.name))
.into_server_error(ctx.item.pos),
));
}
Ok(Some(Value::Enum(name.clone())))
}
(Type::Enum(e), FieldValueInner::Value(Value::String(name))) => {
if !e.enum_values.contains_key(name) {
return Err(ctx.set_error_path(
Error::new(format!("internal: invalid item for enum \"{}\"", e.name))
.into_server_error(ctx.item.pos),
));
}
Ok(Some(Value::Enum(Name::new(name))))
}
(Type::Enum(e), _) => Err(ctx.set_error_path(
Error::new(format!("internal: invalid item for enum \"{}\"", e.name))
.into_server_error(ctx.item.pos),
)),
(Type::Interface(interface), FieldValueInner::WithType { value, ty }) => {
let is_contains_obj = schema
.0
.env
.registry
.types
.get(&interface.name)
.and_then(|meta_type| {
meta_type
.possible_types()
.map(|possible_types| possible_types.contains(ty.as_ref()))
})
.unwrap_or_default();
if !is_contains_obj {
return Err(ctx.set_error_path(
Error::new(format!(
"internal: object \"{}\" does not implement interface \"{}\"",
ty, interface.name,
))
.into_server_error(ctx.item.pos),
));
}
let object_type = schema
.0
.types
.get(ty.as_ref())
.ok_or_else(|| {
ctx.set_error_path(
Error::new(format!("internal: object \"{}\" does not registered", ty))
.into_server_error(ctx.item.pos),
)
})?
.as_object()
.ok_or_else(|| {
ctx.set_error_path(
Error::new(format!("internal: type \"{}\" is not object", ty))
.into_server_error(ctx.item.pos),
)
})?;
resolve_container(
schema,
object_type,
&ctx.with_selection_set(&ctx.item.node.selection_set),
value,
true,
)
.await
}
(Type::Interface(interface), _) => Err(ctx.set_error_path(
Error::new(format!(
"internal: invalid value for interface \"{}\", expected \"FieldValue::WithType\"",
interface.name
))
.into_server_error(ctx.item.pos),
)),
(Type::Union(union), FieldValueInner::WithType { value, ty }) => {
if !union.possible_types.contains(ty.as_ref()) {
return Err(ctx.set_error_path(
Error::new(format!(
"internal: union \"{}\" does not contain object \"{}\"",
union.name, ty,
))
.into_server_error(ctx.item.pos),
));
}
let object_type = schema
.0
.types
.get(ty.as_ref())
.ok_or_else(|| {
ctx.set_error_path(
Error::new(format!("internal: object \"{}\" does not registered", ty))
.into_server_error(ctx.item.pos),
)
})?
.as_object()
.ok_or_else(|| {
ctx.set_error_path(
Error::new(format!("internal: type \"{}\" is not object", ty))
.into_server_error(ctx.item.pos),
)
})?;
resolve_container(
schema,
object_type,
&ctx.with_selection_set(&ctx.item.node.selection_set),
value,
true,
)
.await
}
(Type::Union(union), _) => Err(ctx.set_error_path(
Error::new(format!(
"internal: invalid value for union \"{}\", expected \"FieldValue::WithType\"",
union.name
))
.into_server_error(ctx.item.pos),
)),
(Type::Subscription(subscription), _) => Err(ctx.set_error_path(
Error::new(format!(
"internal: cannot use subscription \"{}\" as output value",
subscription.name
))
.into_server_error(ctx.item.pos),
)),
}
}