Trait FromInputValue 

pub trait FromInputValue<S = DefaultScalarValue>: Sized {
    type Error;

    // Required method
    fn from_input_value(v: &InputValue<S>) -> Result<Self, Self::Error>;

    // Provided method
    fn from_implicit_null() -> Result<Self, Self::Error> { ... }
}

Parsing of an unstructured InputValue into a Rust data type.

The conversion can fail, and must in that case return an Err. Thus, not restricted in the definition of this trait, the returned Err should be convertible with the IntoFieldError trait to fit well into the library machinery.

Required Associated Types

type Error

Type of this conversion error.

Thus, not restricted, it should be convertible with the IntoFieldError trait to fit well into the library machinery.

Required Methods

fn from_input_value(v: &InputValue<S>) -> Result<Self, Self::Error>

Performs the conversion.

Provided Methods

fn from_implicit_null() -> Result<Self, Self::Error>

Performs the conversion from an absent value (e.g. to distinguish between implicit and explicit null).

The default implementation just calls from_input_value() as if an explicit null was provided.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

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

type Error = <T as FromInputValue<S>>::Error

fn from_input_value(v: &InputValue<S>) -> Result<Self, Self::Error>

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

type Error = FromInputValueVecError<T, S>

fn from_input_value(v: &InputValue<S>) -> Result<Self, Self::Error>

impl<T, S> FromInputValue<S> for Box<T>

where S: ScalarValue, T: FromInputValue<S>,

type Error = <T as FromInputValue<S>>::Error

fn from_input_value(v: &InputValue<S>) -> Result<Box<T>, Self::Error>

impl<T, S> FromInputValue<S> for Arc<T>

where S: ScalarValue, T: FromInputValue<S>,

type Error = <T as FromInputValue<S>>::Error

fn from_input_value(v: &InputValue<S>) -> Result<Arc<T>, Self::Error>

impl<T, S, const N: usize> FromInputValue<S> for [T; N]

where T: FromInputValue<S>, S: ScalarValue,

type Error = FromInputValueArrayError<T, S>

fn from_input_value(v: &InputValue<S>) -> Result<Self, Self::Error>

impl<Tz, __S> FromInputValue<__S> for DateTime<Tz>

where Tz: TimeZone + FromFixedOffset, Tz::Offset: Display, __S: ScalarValue,

Available on crate feature chrono only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Tz

where __S: ScalarValue,

Available on crate feature chrono-tz only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for bool

where __S: ScalarValue,

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for f64

where __S: ScalarValue,

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for i32

where __S: ScalarValue,

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for String

where __S: ScalarValue,

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for BigDecimal

where __S: ScalarValue,

Available on crate feature bigdecimal only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for DateTime

where __S: ScalarValue,

Available on crate feature bson only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for ObjectId

where __S: ScalarValue,

Available on crate feature bson only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for NaiveDate

where __S: ScalarValue,

Available on crate feature chrono only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for NaiveDateTime

where __S: ScalarValue,

Available on crate feature chrono only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for NaiveTime

where __S: ScalarValue,

Available on crate feature chrono only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for CompactString

where __S: ScalarValue,

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Date

where __S: ScalarValue,

Available on crate feature jiff only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for DateTime

where __S: ScalarValue,

Available on crate feature jiff only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Time

where __S: ScalarValue,

Available on crate feature jiff only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Span

where __S: ScalarValue,

Available on crate feature jiff only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Timestamp

where __S: ScalarValue,

Available on crate feature jiff only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Offset

where __S: ScalarValue,

Available on crate feature jiff only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for TimeZone

where __S: ScalarValue,

Available on crate feature jiff only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Zoned

where __S: ScalarValue,

Available on crate feature jiff only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Decimal

where __S: ScalarValue,

Available on crate feature rust_decimal only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Date

where __S: ScalarValue,

Available on crate feature time only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for OffsetDateTime

where __S: ScalarValue,

Available on crate feature time only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for PrimitiveDateTime

where __S: ScalarValue,

Available on crate feature time only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Time

where __S: ScalarValue,

Available on crate feature time only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for UtcOffset

where __S: ScalarValue,

Available on crate feature time only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Url

where __S: ScalarValue,

Available on crate feature url only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

impl<__S> FromInputValue<__S> for Uuid

where __S: ScalarValue,

Available on crate feature uuid only.

type Error = FieldError<__S>

fn from_input_value(input: &InputValue<__S>) -> Result<Self, Self::Error>

Implementors

impl<S, T: FromInputValue<S>> FromInputValue<S> for Nullable<T>

type Error = <T as FromInputValue<S>>::Error

impl<__S> FromInputValue<__S> for TypeKind

where __S: ScalarValue,

type Error = String

impl<__S> FromInputValue<__S> for Episode

where __S: ScalarValue,

Available on crate feature expose-test-schema only.

type Error = String

impl<__S> FromInputValue<__S> for juniper::integrations::jiff::TimeZone

where __S: ScalarValue,

Available on crate feature jiff only.

type Error = FieldError<__S>

impl<__S> FromInputValue<__S> for ArcStr

where __S: ScalarValue,

type Error = FieldError<__S>

impl<__S> FromInputValue<__S> for ID

where __S: ScalarValue,

type Error = FieldError<__S>