Trait async_graphql::OutputType
source · pub trait OutputType: Send + Sync {
fn type_name() -> Cow<'static, str>;
fn create_type_info(registry: &mut Registry) -> String;
fn resolve<'life0, 'life1, 'life2, 'life3, 'async_trait>(
&'life0 self,
ctx: &'life1 ContextSelectionSet<'life2>,
field: &'life3 Positioned<Field>
) -> Pin<Box<dyn Future<Output = ServerResult<Value>> + Send + 'async_trait>>
where
Self: 'async_trait,
'life0: 'async_trait,
'life1: 'async_trait,
'life2: 'async_trait,
'life3: 'async_trait;
fn qualified_type_name() -> String { ... }
fn introspection_type_name(&self) -> Cow<'static, str> { ... }
}Expand description
Represents a GraphQL output type.
Required Methods§
sourcefn create_type_info(registry: &mut Registry) -> String
fn create_type_info(registry: &mut Registry) -> String
Create type information in the registry and return qualified typename.
sourcefn resolve<'life0, 'life1, 'life2, 'life3, 'async_trait>(
&'life0 self,
ctx: &'life1 ContextSelectionSet<'life2>,
field: &'life3 Positioned<Field>
) -> Pin<Box<dyn Future<Output = ServerResult<Value>> + Send + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
'life1: 'async_trait,
'life2: 'async_trait,
'life3: 'async_trait,
fn resolve<'life0, 'life1, 'life2, 'life3, 'async_trait>(
&'life0 self,
ctx: &'life1 ContextSelectionSet<'life2>,
field: &'life3 Positioned<Field>
) -> Pin<Box<dyn Future<Output = ServerResult<Value>> + Send + 'async_trait>>where
Self: 'async_trait,
'life0: 'async_trait,
'life1: 'async_trait,
'life2: 'async_trait,
'life3: 'async_trait,
Resolve an output value to async_graphql::Value.
Provided Methods§
sourcefn qualified_type_name() -> String
fn qualified_type_name() -> String
Qualified typename.
Examples found in repository?
More examples
src/types/external/list/array.rs (line 58)
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fn type_name() -> Cow<'static, str> {
Cow::Owned(format!("[{}]", T::qualified_type_name()))
}
fn qualified_type_name() -> String {
format!("[{}]!", T::qualified_type_name())
}
fn create_type_info(registry: &mut registry::Registry) -> String {
T::create_type_info(registry);
Self::qualified_type_name()
}src/types/external/list/btree_set.rs (line 51)
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fn type_name() -> Cow<'static, str> {
Cow::Owned(format!("[{}]", T::qualified_type_name()))
}
fn qualified_type_name() -> String {
format!("[{}]!", T::qualified_type_name())
}
fn create_type_info(registry: &mut registry::Registry) -> String {
T::create_type_info(registry);
Self::qualified_type_name()
}src/types/external/list/hash_set.rs (line 51)
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fn type_name() -> Cow<'static, str> {
Cow::Owned(format!("[{}]", T::qualified_type_name()))
}
fn qualified_type_name() -> String {
format!("[{}]!", T::qualified_type_name())
}
fn create_type_info(registry: &mut registry::Registry) -> String {
T::create_type_info(registry);
Self::qualified_type_name()
}src/types/external/list/linked_list.rs (line 52)
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fn type_name() -> Cow<'static, str> {
Cow::Owned(format!("[{}]", T::qualified_type_name()))
}
fn qualified_type_name() -> String {
format!("[{}]!", T::qualified_type_name())
}
fn create_type_info(registry: &mut registry::Registry) -> String {
T::create_type_info(registry);
Self::qualified_type_name()
}src/types/external/list/slice.rs (line 11)
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fn type_name() -> Cow<'static, str> {
Cow::Owned(format!("[{}]", T::qualified_type_name()))
}
fn qualified_type_name() -> String {
format!("[{}]!", T::qualified_type_name())
}
fn create_type_info(registry: &mut registry::Registry) -> String {
T::create_type_info(registry);
Self::qualified_type_name()
}Additional examples can be found in:
sourcefn introspection_type_name(&self) -> Cow<'static, str>
fn introspection_type_name(&self) -> Cow<'static, str>
Introspection type name
Is the return value of field __typename, the interface and union
should return the current type, and the others return Type::type_name.
Examples found in repository?
src/resolver_utils/container.rs (line 194)
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pub fn add_set<T: ContainerType + ?Sized>(
&mut self,
ctx: &ContextSelectionSet<'a>,
root: &'a T,
) -> ServerResult<()> {
for selection in &ctx.item.node.items {
match &selection.node {
Selection::Field(field) => {
if field.node.name.node == "__typename" {
// Get the typename
let ctx_field = ctx.with_field(field);
let field_name = ctx_field.item.node.response_key().node.clone();
let typename = root.introspection_type_name().into_owned();
self.0.push(Box::pin(async move {
Ok((field_name, Value::String(typename)))
}));
continue;
}
let resolve_fut = Box::pin({
let ctx = ctx.clone();
async move {
let ctx_field = ctx.with_field(field);
let field_name = ctx_field.item.node.response_key().node.clone();
let extensions = &ctx.query_env.extensions;
if extensions.is_empty() && field.node.directives.is_empty() {
Ok((
field_name,
root.resolve_field(&ctx_field).await?.unwrap_or_default(),
))
} else {
let type_name = T::type_name();
let resolve_info = ResolveInfo {
path_node: ctx_field.path_node.as_ref().unwrap(),
parent_type: &type_name,
return_type: match ctx_field
.schema_env
.registry
.types
.get(type_name.as_ref())
.and_then(|ty| {
ty.field_by_name(field.node.name.node.as_str())
})
.map(|field| &field.ty)
{
Some(ty) => &ty,
None => {
return Err(ServerError::new(
format!(
r#"Cannot query field "{}" on type "{}"."#,
field_name, type_name
),
Some(ctx_field.item.pos),
));
}
},
name: field.node.name.node.as_str(),
alias: field
.node
.alias
.as_ref()
.map(|alias| alias.node.as_str()),
is_for_introspection: ctx_field.is_for_introspection,
};
let resolve_fut = root.resolve_field(&ctx_field);
if field.node.directives.is_empty() {
futures_util::pin_mut!(resolve_fut);
Ok((
field_name,
extensions
.resolve(resolve_info, &mut resolve_fut)
.await?
.unwrap_or_default(),
))
} else {
let mut resolve_fut = resolve_fut.boxed();
for directive in &field.node.directives {
if let Some(directive_factory) = ctx
.schema_env
.custom_directives
.get(directive.node.name.node.as_str())
{
let ctx_directive = ContextBase {
path_node: ctx_field.path_node,
is_for_introspection: false,
item: directive,
schema_env: ctx_field.schema_env,
query_env: ctx_field.query_env,
};
let directive_instance = directive_factory
.create(&ctx_directive, &directive.node)?;
resolve_fut = Box::pin({
let ctx_field = ctx_field.clone();
async move {
directive_instance
.resolve_field(&ctx_field, &mut resolve_fut)
.await
}
});
}
}
Ok((
field_name,
extensions
.resolve(resolve_info, &mut resolve_fut)
.await?
.unwrap_or_default(),
))
}
}
}
});
self.0.push(resolve_fut);
}
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!(
r#"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 = root.introspection_type_name();
let applies_concrete_object = type_condition.map_or(false, |condition| {
introspection_type_name == condition
|| ctx
.schema_env
.registry
.implements
.get(&*introspection_type_name)
.map_or(false, |interfaces| interfaces.contains(condition))
});
if applies_concrete_object {
root.collect_all_fields(&ctx.with_selection_set(selection_set), self)?;
} else if type_condition.map_or(true, |condition| T::type_name() == condition) {
// The fragment applies to an interface type.
self.add_set(&ctx.with_selection_set(selection_set), root)?;
}
}
}
}
Ok(())
}