Trait juniper::FromInputValue[−][src]

pub trait FromInputValue<S = DefaultScalarValue>: Sized {
    fn from_input_value(v: &InputValue<S>) -> Option<Self>;

    fn from_implicit_null() -> Self { ... }
}

Parse an unstructured input value into a Rust data type.

The conversion can fail, and must in that case return None. Implemented automatically by the convenience proc macro graphql_scalar or by deriving GraphQLEnum.

Must be implemented manually when manually exposing new enums or scalars.

Required methods

`fn from_input_value(v: &InputValue<S>) -> Option<Self>`[src]

Performs the conversion.

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Provided methods

`fn from_implicit_null() -> Self`[src]

Performs the conversion from an absent value (e.g. to distinguish between implicit and explicit null). The default implementation just uses from_input_value as if an explicit null were provided. This conversion must not fail.

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Implementations on Foreign Types

`impl<S, T> FromInputValue<S> for Option<T> where T: FromInputValue<S>, S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<Option<T>>`[src]

`impl<T, S> FromInputValue<S> for Vec<T> where T: FromInputValue<S>, S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<Vec<T>>`[src]

`impl<T, S> FromInputValue<S> for Box<T> where S: ScalarValue, T: FromInputValue<S>,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<Box<T>>`[src]

`impl<T, S> FromInputValue<S> for Arc<T> where S: ScalarValue, T: FromInputValue<S>,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<Arc<T>>`[src]

`impl<S> FromInputValue<S> for String where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<String>`[src]

`impl<S> FromInputValue<S> for bool where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<bool>`[src]

`impl<S> FromInputValue<S> for i32 where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<i32>`[src]

`impl<S> FromInputValue<S> for f64 where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<f64>`[src]

`impl<S> FromInputValue<S> for DateTime<FixedOffset> where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<DateTime<FixedOffset>>`[src]

`impl<S> FromInputValue<S> for DateTime<Utc> where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<DateTime<Utc>>`[src]

`impl<S> FromInputValue<S> for NaiveDate where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<NaiveDate>`[src]

`impl<S> FromInputValue<S> for NaiveDateTime where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<NaiveDateTime>`[src]

`impl<S> FromInputValue<S> for Url where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<Url>`[src]

`impl<S> FromInputValue<S> for Uuid where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<Uuid>`[src]

`impl<S> FromInputValue<S> for ObjectId where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<ObjectId>`[src]

`impl<S> FromInputValue<S> for UtcDateTime where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<UtcDateTime>`[src]

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Implementors

`impl<S> FromInputValue<S> for ID where S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<ID>`[src]

`impl<S, T> FromInputValue<S> for Nullable<T> where T: FromInputValue<S>, S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<S>) -> Option<Nullable<T>>`[src]

`fn from_implicit_null() -> Self`[src]

`impl<S> FromInputValue<S> for TypeKind where __S: ScalarValue,` [src]

`fn from_input_value(v: &InputValue<__S>) -> Option<TypeKind>`[src]

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