Trait juniper::FromInputValue

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

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 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> where
    &'b S: ScalarRefValue<'b>, 

Performs the conversion.

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Implementations on Foreign Types

impl<S, T> FromInputValue<S> for Option<T> where
    T: FromInputValue<S>,
    S: ScalarValue, 

fn from_input_value<'a>(v: &'a InputValue<S>) -> Option<Option<T>> where
    &'b S: ScalarRefValue<'b>, 

impl<T, S> FromInputValue<S> for Vec<T> where
    T: FromInputValue<S>,
    S: ScalarValue, 

fn from_input_value<'a>(v: &'a InputValue<S>) -> Option<Vec<T>> where
    &'b S: ScalarRefValue<'b>, 

impl<T, S> FromInputValue<S> for Box<T> where
    S: ScalarValue,
    T: FromInputValue<S>, 

fn from_input_value<'a>(v: &'a InputValue<S>) -> Option<Box<T>> where
    &'b S: ScalarRefValue<'b>, 

impl<S> FromInputValue<S> for String where
    S: ScalarValue,
    &'__b S: ScalarRefValue<'__b>, 

fn from_input_value(v: &InputValue<S>) -> Option<String>

impl<S> FromInputValue<S> for bool where
    S: ScalarValue,
    &'__b S: ScalarRefValue<'__b>, 

fn from_input_value(v: &InputValue<S>) -> Option<bool>

impl<S> FromInputValue<S> for i32 where
    S: ScalarValue,
    &'__b S: ScalarRefValue<'__b>, 

fn from_input_value(v: &InputValue<S>) -> Option<i32>

impl<S> FromInputValue<S> for f64 where
    S: ScalarValue,
    &'__b S: ScalarRefValue<'__b>, 

fn from_input_value(v: &InputValue<S>) -> Option<f64>

impl<S: Debug> FromInputValue<S> for ()

fn from_input_value<'a>(_: &'a InputValue<S>) -> Option<()> where
    &'b S: ScalarRefValue<'b>, 

impl<S> FromInputValue<S> for DateTime<FixedOffset> where
    S: ScalarValue,
    &'__b S: ScalarRefValue<'__b>, 

fn from_input_value(v: &InputValue<S>) -> Option<DateTime<FixedOffset>>

impl<S> FromInputValue<S> for DateTime<Utc> where
    S: ScalarValue,
    &'__b S: ScalarRefValue<'__b>, 

fn from_input_value(v: &InputValue<S>) -> Option<DateTime<Utc>>

impl<S> FromInputValue<S> for NaiveDate where
    S: ScalarValue,
    &'__b S: ScalarRefValue<'__b>, 

fn from_input_value(v: &InputValue<S>) -> Option<NaiveDate>

impl<S> FromInputValue<S> for NaiveDateTime where
    S: ScalarValue,
    &'__b S: ScalarRefValue<'__b>, 

fn from_input_value(v: &InputValue<S>) -> Option<NaiveDateTime>

impl<S> FromInputValue<S> for Url where
    S: ScalarValue,
    &'__b S: ScalarRefValue<'__b>, 

fn from_input_value(v: &InputValue<S>) -> Option<Url>

impl<S> FromInputValue<S> for Uuid where
    S: ScalarValue,
    &'__b S: ScalarRefValue<'__b>, 

fn from_input_value(v: &InputValue<S>) -> Option<Uuid>

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Implementors

impl<S> FromInputValue<S> for ID where
    S: ScalarValue,
    &'__b S: ScalarRefValue<'__b>, 

fn from_input_value(v: &InputValue<S>) -> Option<ID>

impl<__S: ScalarValue> FromInputValue<__S> for TypeKind

fn from_input_value(v: &InputValue<__S>) -> Option<TypeKind> where
    &'__b __S: ScalarRefValue<'__b>, 

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