Enum CascadeError 

pub enum CascadeError {
    Refused(Box<ImpactReport>),
    NotFound(String),
    NotImplemented(String),
    PostCondition(String),
}

Why a delete_with_cascade did not complete. Refused is an expected, renderable outcome (a hard reference blocks the delete), not a bug.

Variants

Refused(Box<ImpactReport>)

A hard reference blocks the delete; no mutation was performed. The report lists the blockers for the surface to render. Boxed so the common Ok path (and the other variants) don’t carry ImpactReport’s several Vecs inline (clippy::result_large_err).

NotFound(String)

The target alias does not exist.

NotImplemented(String)

This alias kind is not yet wired into delete_with_cascade.

PostCondition(String)

Trait Implementations

impl Debug for CascadeError

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

Formats the value using the given formatter.

impl Display for CascadeError

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

Formats the value using the given formatter.

impl Error for CascadeError

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.