65 lines
1.5 KiB
Rust
65 lines
1.5 KiB
Rust
use crate::{
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registry, Context, ContextSelectionSet, Error, ObjectType, OutputValueType, Pos, QueryError,
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Result, Type,
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};
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use std::borrow::Cow;
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/// Empty mutation
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///
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/// Only the parameters used to construct the Schema, representing an unconfigured mutation.
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///
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/// # Examples
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///
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/// ```rust
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/// use async_graphql::*;
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///
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/// struct QueryRoot;
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///
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/// #[Object]
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/// impl QueryRoot {}
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///
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/// fn main() {
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/// let schema = Schema::new(QueryRoot, EmptyMutation, EmptySubscription);
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/// }
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/// ```
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pub struct EmptyMutation;
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impl Type for EmptyMutation {
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fn type_name() -> Cow<'static, str> {
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Cow::Borrowed("EmptyMutation")
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}
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fn create_type_info(registry: &mut registry::Registry) -> String {
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registry.create_type::<Self, _>(|_| registry::Type::Object {
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name: "EmptyMutation".to_string(),
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description: None,
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fields: Default::default(),
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cache_control: Default::default(),
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extends: false,
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keys: None,
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})
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}
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}
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#[async_trait::async_trait]
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impl ObjectType for EmptyMutation {
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fn is_empty() -> bool {
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true
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}
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async fn resolve_field(&self, _ctx: &Context<'_>) -> Result<serde_json::Value> {
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unreachable!()
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}
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}
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#[async_trait::async_trait]
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impl OutputValueType for EmptyMutation {
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async fn resolve(&self, _ctx: &ContextSelectionSet<'_>, pos: Pos) -> Result<serde_json::Value> {
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Err(Error::Query {
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pos,
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path: None,
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err: QueryError::NotConfiguredMutations,
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})
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}
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}
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