Enum ProjectionError 

pub enum ProjectionError {
    UnknownField {
        field: String,
    },
    TypeMismatch {
        field: String,
        expected: &'static str,
        got: DataType,
    },
    EmptyDataset,
    LengthMismatch {
        field: String,
        expected: usize,
        got: usize,
    },
    UnsupportedBinding {
        reason: String,
    },
}

Errors raised when extracting or projecting chart columns from a crate::Dataset.

Variants

UnknownField

Referenced field is not present in the dataset schema.

Fields

field: String

TypeMismatch

Cell value variant does not match the expected column type.

Fields

field: String

expected: &'static str

got: DataType

EmptyDataset

Dataset has no records.

LengthMismatch

Extracted column length does not match the expected row count.

Fields

field: String

expected: usize

got: usize

UnsupportedBinding

Binding feature not yet supported by the projection engine.

Fields

reason: String

Trait Implementations

impl Clone for ProjectionError

fn clone(&self) -> ProjectionError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ProjectionError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ProjectionError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for ProjectionError

impl Error for ProjectionError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for ProjectionError

fn eq(&self, other: &ProjectionError) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ProjectionError