Trait juniper::FromInputValue

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

Performs the conversion.

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

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

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

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

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

impl<S> FromInputValue<S> for i32where
    S: ScalarValue,
    for<'__b> &'__b S: ScalarRefValue<'__b>,

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

impl<S> FromInputValue<S> for f64where
    S: ScalarValue,
    for<'__b> &'__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
    for<'b> &'b S: ScalarRefValue<'b>,

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

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

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

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

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

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

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

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

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

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

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

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

Implementors

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

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