async_graphql/types/external/
string.rs

1use std::borrow::Cow;
2
3use crate::{
4    ContextSelectionSet, InputType, InputValueError, InputValueResult, OutputType, Positioned,
5    Scalar, ScalarType, ServerResult, Value, parser::types::Field, registry, registry::Registry,
6};
7
8/// The `String` scalar type represents textual data, represented as UTF-8
9/// character sequences. The String type is most often used by GraphQL to
10/// represent free-form human-readable text.
11#[Scalar(internal)]
12impl ScalarType for String {
13    fn parse(value: Value) -> InputValueResult<Self> {
14        match value {
15            Value::String(s) => Ok(s),
16            _ => Err(InputValueError::expected_type(value)),
17        }
18    }
19
20    fn is_valid(value: &Value) -> bool {
21        matches!(value, Value::String(_))
22    }
23
24    fn to_value(&self) -> Value {
25        Value::String(self.clone())
26    }
27}
28
29macro_rules! impl_input_string_for_smart_ptr {
30    ($ty:ty) => {
31        impl InputType for $ty {
32            type RawValueType = Self;
33
34            fn type_name() -> Cow<'static, str> {
35                Cow::Borrowed("String")
36            }
37
38            fn create_type_info(registry: &mut Registry) -> String {
39                <String as OutputType>::create_type_info(registry)
40            }
41
42            fn parse(value: Option<Value>) -> InputValueResult<Self> {
43                let value = value.unwrap_or_default();
44                match value {
45                    Value::String(s) => Ok(s.into()),
46                    _ => Err(InputValueError::expected_type(value)),
47                }
48            }
49
50            fn to_value(&self) -> Value {
51                Value::String(self.to_string())
52            }
53
54            fn as_raw_value(&self) -> Option<&Self::RawValueType> {
55                Some(self)
56            }
57        }
58    };
59}
60
61impl_input_string_for_smart_ptr!(Box<str>);
62impl_input_string_for_smart_ptr!(std::sync::Arc<str>);
63
64#[cfg_attr(feature = "boxed-trait", async_trait::async_trait)]
65impl OutputType for str {
66    fn type_name() -> Cow<'static, str> {
67        Cow::Borrowed("String")
68    }
69
70    fn create_type_info(registry: &mut registry::Registry) -> String {
71        <String as OutputType>::create_type_info(registry)
72    }
73
74    async fn resolve(
75        &self,
76        _: &ContextSelectionSet<'_>,
77        _field: &Positioned<Field>,
78    ) -> ServerResult<Value> {
79        Ok(Value::String(self.to_string()))
80    }
81}
async_graphql/types/external/string.rs

async_graphql/types/external/
string.rs
