pub enum TryForEachError<E> {
Sqlx(Error),
Callback(E),
}Expand description
Feature 29 — composite error returned by
super::QuerySet::try_for_each. The chunked streaming terminal
can fail in two ways and the call site usually wants to
distinguish: a SQL fetch failure is a system-level problem (DB
went away, schema mismatch, etc.), while a callback error is
whatever domain-specific failure the user’s body produced (file
write blew up, validation rejected the row, etc.).
Variants§
Sqlx(Error)
A database fetch returned an error mid-iteration. The callback never saw this row.
Callback(E)
The user’s callback returned an error for some row. The walk stopped immediately; rows after the failing one were not fetched.
Trait Implementations§
Source§impl<E: Debug> Debug for TryForEachError<E>
impl<E: Debug> Debug for TryForEachError<E>
Source§impl<E: Display> Display for TryForEachError<E>
impl<E: Display> Display for TryForEachError<E>
Source§impl<E: Debug + Display> Error for TryForEachError<E>
impl<E: Debug + Display> Error for TryForEachError<E>
Source§fn source(&self) -> Option<&(dyn Error + 'static)>
fn source(&self) -> Option<&(dyn Error + 'static)>
1.0.0 · Source§fn description(&self) -> &str
fn description(&self) -> &str
use the Display impl or to_string()
Auto Trait Implementations§
impl<E> !RefUnwindSafe for TryForEachError<E>
impl<E> !UnwindSafe for TryForEachError<E>
impl<E> Freeze for TryForEachError<E>where
E: Freeze,
impl<E> Send for TryForEachError<E>where
E: Send,
impl<E> Sync for TryForEachError<E>where
E: Sync,
impl<E> Unpin for TryForEachError<E>where
E: Unpin,
impl<E> UnsafeUnpin for TryForEachError<E>where
E: UnsafeUnpin,
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