74 lines
1.8 KiB
Rust
74 lines
1.8 KiB
Rust
use std::borrow::Cow;
|
|
|
|
use crate::parser::types::Field;
|
|
use crate::resolver_utils::ContainerType;
|
|
use crate::{
|
|
registry, Context, ContextSelectionSet, ObjectType, OutputType, Positioned, ServerError,
|
|
ServerResult, Type, Value,
|
|
};
|
|
|
|
/// Empty mutation
|
|
///
|
|
/// Only the parameters used to construct the Schema, representing an unconfigured mutation.
|
|
///
|
|
/// # Examples
|
|
///
|
|
/// ```rust
|
|
/// use async_graphql::*;
|
|
///
|
|
/// struct QueryRoot;
|
|
///
|
|
/// #[Object]
|
|
/// impl QueryRoot {
|
|
/// async fn value(&self) -> i32 {
|
|
/// // A GraphQL Object type must define one or more fields.
|
|
/// 100
|
|
/// }
|
|
/// }
|
|
///
|
|
/// let schema = Schema::new(QueryRoot, EmptyMutation, EmptySubscription);
|
|
/// ```
|
|
#[derive(Default, Copy, Clone)]
|
|
pub struct EmptyMutation;
|
|
|
|
impl Type for EmptyMutation {
|
|
fn type_name() -> Cow<'static, str> {
|
|
Cow::Borrowed("EmptyMutation")
|
|
}
|
|
|
|
fn create_type_info(registry: &mut registry::Registry) -> String {
|
|
registry.create_type::<Self, _>(|_| registry::MetaType::Object {
|
|
name: "EmptyMutation".to_string(),
|
|
description: None,
|
|
fields: Default::default(),
|
|
cache_control: Default::default(),
|
|
extends: false,
|
|
keys: None,
|
|
})
|
|
}
|
|
}
|
|
|
|
#[async_trait::async_trait]
|
|
impl ContainerType for EmptyMutation {
|
|
fn is_empty() -> bool {
|
|
true
|
|
}
|
|
|
|
async fn resolve_field(&self, _ctx: &Context<'_>) -> ServerResult<Option<Value>> {
|
|
unreachable!()
|
|
}
|
|
}
|
|
|
|
#[async_trait::async_trait]
|
|
impl OutputType for EmptyMutation {
|
|
async fn resolve(
|
|
&self,
|
|
_ctx: &ContextSelectionSet<'_>,
|
|
field: &Positioned<Field>,
|
|
) -> ServerResult<Value> {
|
|
Err(ServerError::new("Schema is not configured for mutations.").at(field.pos))
|
|
}
|
|
}
|
|
|
|
impl ObjectType for EmptyMutation {}
|