Enum Error 

#[non_exhaustive]
pub enum Error {
    Storage {
        message: String,
        source: Box<dyn Error + Send + Sync + 'static>,
    },
    Metadata {
        message: String,
        source: Box<dyn Error + Send + Sync + 'static>,
    },
    Embedder {
        message: String,
        source: Box<dyn Error + Send + Sync + 'static>,
    },
    EmbedderMismatch {
        expected: String,
        expected_dims: usize,
        got: String,
        got_dims: usize,
    },
    PartitionSchemeMismatch {
        expected: String,
        got: String,
    },
    PartitionInvalid(PartitionResolveError),
    PartitionSchemeInvalid(InvalidScheme),
    TenantInvalid(InvalidTenantId),
    MemoryNotFound(String),
    SummaryNotFound(String),
    Tombstoned(String),
    LinkInvalid(String),
    IndexCorrupt(String),
    Recovery(String),
    Config(String),
    CapabilityMissing {
        plugin: &'static str,
        required: &'static str,
        got: bool,
    },
    Io(Error),
    InvalidAttribute {
        reason: String,
    },
    InvalidAnchor(String),
    SnapshotNotFound {
        id: String,
    },
    EmbedderDimMismatch {
        old: usize,
        new: usize,
    },
    MigrationConflict {
        reason: String,
    },
}

Public error type. Carries structured context where useful.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Storage

Storage backend failure.

Fields

message: String

Human-readable detail.

source: Box<dyn Error + Send + Sync + 'static>

Underlying error.

Metadata

Metadata backend failure (SQL, sqlite, migrations).

Fields

message: String

Human-readable detail.

source: Box<dyn Error + Send + Sync + 'static>

Underlying error.

Embedder

Embedder failure.

Fields

message: String

Human-readable detail.

source: Box<dyn Error + Send + Sync + 'static>

Underlying error.

EmbedderMismatch

embedder.id() does not match the value persisted in schema_meta.

Fields

expected: String

Embedder id stored in schema_meta.

expected_dims: usize

Stored embedder dims.

got: String

Embedder id passed to open().

got_dims: usize

Open-time embedder dims.

PartitionSchemeMismatch

Persisted partition scheme differs from the value passed to the builder.

Fields

expected: String

Stored scheme.

got: String

Builder-supplied scheme.

PartitionInvalid(PartitionResolveError)

Partition path was malformed or did not match the scheme.

PartitionSchemeInvalid(InvalidScheme)

Partition scheme template was malformed.

TenantInvalid(InvalidTenantId)

Tenant id was invalid.

MemoryNotFound(String)

Lookup miss.

SummaryNotFound(String)

Summary lookup miss (Plan 9).

Tombstoned(String)

Operation rejected because the memory is soft-tombstoned.

LinkInvalid(String)

Link request invalid (self-link, missing endpoint, etc.).

IndexCorrupt(String)

On-disk index detected as corrupt (Plan 3+).

Recovery(String)

Recovery walker failed to replay an audit-log entry (Plan 3+).

Config(String)

Builder / config validation error.

CapabilityMissing

A configured plugin reported it does not support a capability the engine requires.

Fields

plugin: &'static str

Which plugin (Storage / Metadata / Embedder).

required: &'static str

The capability flag the engine required.

got: bool

What the plugin reported.

Io(Error)

I/O error (filesystem-side mostly).

InvalidAttribute

Caller passed an crate::attribute::AttributeValue that violates a constraint — kind mismatch on a range query, non-orderable kind on a range query, or a decoding failure on read.

Fields

reason: String

Human-readable reason.

InvalidAnchor(String)

Anchor / citation URI failed to parse. See crate::Memory::resolve_anchor.

SnapshotNotFound

Snapshot id was not found in snapshot. Reserved for the deferred Plan 12 Memory::at / Memory::restore paths; crate::Memory::delete_snapshot is currently idempotent on missing rows and does not return this variant.

Fields

id: String

Snapshot id (ULID).

EmbedderDimMismatch

regenerate_embeddings rejected an embedder whose dim differs from the persisted store dim.

Fields

old: usize

Stored dim.

new: usize

New embedder’s dim.

MigrationConflict

migrate_scheme could not proceed (e.g. previous run is still in_progress with a different mapper).

Fields

reason: String

Human-readable reason.

Implementations

impl Error

pub fn storage<E>(message: impl Into<String>, source: E) -> Self

where E: Into<Box<dyn Error + Send + Sync + 'static>>,

Convenience constructor.

pub fn metadata<E>(message: impl Into<String>, source: E) -> Self

where E: Into<Box<dyn Error + Send + Sync + 'static>>,

Convenience constructor.

pub fn embedder<E>(message: impl Into<String>, source: E) -> Self

where E: Into<Box<dyn Error + Send + Sync + 'static>>,

Convenience constructor.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<InvalidScheme> for Error

fn from(source: InvalidScheme) -> Self

Converts to this type from the input type.

impl From<InvalidTenantId> for Error

fn from(source: InvalidTenantId) -> Self

Converts to this type from the input type.

impl From<PartitionResolveError> for Error

fn from(source: PartitionResolveError) -> Self

Converts to this type from the input type.