Enum DbErr 

#[non_exhaustive]
pub enum DbErr {
    Driver(Error),
    RecordNotFound(String),
    RecordNotInserted,
    RecordNotUpdated,
    AttrNotSet(String),
    PrimaryKeyNotSet,
    Type(String),
    Json(String),
    Migration(String),
    Custom(String),
}

The error returned by every fallible operation of the ORM.

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.

Driver(Error)

An error reported by the driver or the engine.

RecordNotFound(String)

A row was expected but none was found.

RecordNotInserted

An INSERT inserted nothing, for example under ON CONFLICT DO NOTHING.

RecordNotUpdated

An UPDATE matched no row.

AttrNotSet(String)

A required attribute of an active model is NotSet.

PrimaryKeyNotSet

A primary key value is missing from an active model.

Type(String)

A value had the wrong type for the target column or field.

Json(String)

A JSON conversion failed.

Migration(String)

A migration failed.

Custom(String)

A free-form error raised by user code or hooks.

Implementations

impl DbErr

pub fn kind(&self) -> Option<ErrorKind>

The classification of the underlying driver error, if any.

ORM-level variants carry no driver classification and yield None.

pub fn constraint(&self) -> Option<ConstraintKind>

The violated constraint, when this wraps a constraint error.

pub fn is_busy(&self) -> bool

Whether the error is transient lock contention worth retrying.

pub fn is_unique_violation(&self) -> bool

Whether the error is a unique-key violation.

pub fn is_foreign_key_violation(&self) -> bool

Whether the error is a foreign-key violation.

Trait Implementations

impl Debug for DbErr

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

Formats the value using the given formatter.

impl Display for DbErr

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

Formats the value using the given formatter.

impl Error for DbErr

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 DbErr

fn from(source: Error) -> DbErr

Converts to this type from the input type.