async_graphql/types/external/
string.rs

1use std::borrow::Cow;
2
3use crate::{
4    parser::types::Field, registry, registry::Registry, ContextSelectionSet, InputType,
5    InputValueError, InputValueResult, OutputType, Positioned, Scalar, ScalarType, ServerResult,
6    Value,
7};
8
9/// The `String` scalar type represents textual data, represented as UTF-8
10/// character sequences. The String type is most often used by GraphQL to
11/// represent free-form human-readable text.
12#[Scalar(internal)]
13impl ScalarType for String {
14    fn parse(value: Value) -> InputValueResult<Self> {
15        match value {
16            Value::String(s) => Ok(s),
17            _ => Err(InputValueError::expected_type(value)),
18        }
19    }
20
21    fn is_valid(value: &Value) -> bool {
22        matches!(value, Value::String(_))
23    }
24
25    fn to_value(&self) -> Value {
26        Value::String(self.clone())
27    }
28}
29
30macro_rules! impl_input_string_for_smart_ptr {
31    ($ty:ty) => {
32        impl InputType for $ty {
33            type RawValueType = Self;
34
35            fn type_name() -> Cow<'static, str> {
36                Cow::Borrowed("String")
37            }
38
39            fn create_type_info(registry: &mut Registry) -> String {
40                <String as OutputType>::create_type_info(registry)
41            }
42
43            fn parse(value: Option<Value>) -> InputValueResult<Self> {
44                let value = value.unwrap_or_default();
45                match value {
46                    Value::String(s) => Ok(s.into()),
47                    _ => Err(InputValueError::expected_type(value)),
48                }
49            }
50
51            fn to_value(&self) -> Value {
52                Value::String(self.to_string())
53            }
54
55            fn as_raw_value(&self) -> Option<&Self::RawValueType> {
56                Some(self)
57            }
58        }
59    };
60}
61
62impl_input_string_for_smart_ptr!(Box<str>);
63impl_input_string_for_smart_ptr!(std::sync::Arc<str>);
64
65#[cfg_attr(feature = "boxed-trait", async_trait::async_trait)]
66impl OutputType for str {
67    fn type_name() -> Cow<'static, str> {
68        Cow::Borrowed("String")
69    }
70
71    fn create_type_info(registry: &mut registry::Registry) -> String {
72        <String as OutputType>::create_type_info(registry)
73    }
74
75    async fn resolve(
76        &self,
77        _: &ContextSelectionSet<'_>,
78        _field: &Positioned<Field>,
79    ) -> ServerResult<Value> {
80        Ok(Value::String(self.to_string()))
81    }
82}
async_graphql/types/external/string.rs

async_graphql/types/external/
string.rs
