Enum PipelineError 

pub enum PipelineError {
    LengthMismatch {
        cat: usize,
        emb: usize,
    },
    TooFewEmbeddings(usize),
    Projection(ProjectionError),
    UnknownCategory(String),
    UnknownId(String),
    AllTrialsFailed {
        failures: Vec<(PipelineConfig, String)>,
    },
}

Reasons a pipeline build or query can fail.

Variants

LengthMismatch

categories and embeddings had different lengths — they must match one-to-one.

Fields

cat: usize

emb: usize

TooFewEmbeddings(usize)

Fewer than 3 embeddings — not enough to fit a 3D projection.

Projection(ProjectionError)

Projection fit rejected the input. Wraps ProjectionError — empty corpus, dim-too-low, inconsistent dim, invalid sigma, etc.

UnknownCategory(String)

A category-keyed query referenced a name that doesn’t exist in the pipeline. Previously these paths silently returned empty results / None, which callers couldn’t distinguish from “category exists but is disconnected on the graph”.

UnknownId(String)

A concept-path query referenced an id that doesn’t exist in the pipeline.

AllTrialsFailed

Every auto_tune trial failed a downstream validator (e.g. every candidate config was rejected by the pipeline builder). The attached failures list carries the (config, error) pairs the tuner observed — callers should inspect them to find the real cause; the outer error is just a roll-up saying “none of the trials produced a scorable pipeline”.

Fields

failures: Vec<(PipelineConfig, String)>

Trait Implementations

impl Clone for PipelineError

fn clone(&self) -> PipelineError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PipelineError

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

Formats the value using the given formatter.

impl Display for PipelineError

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

Formats the value using the given formatter.

impl Error for PipelineError

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 From<ProjectionError> for PipelineError

fn from(source: ProjectionError) -> Self

Converts to this type from the input type.