Trait DatabaseError

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pub trait DatabaseError:
    'static
    + Send
    + Sync
    + StdError {
    // Required method
    fn message(&self) -> &str;

    // Provided methods
    fn code(&self) -> Option<Cow<'_, str>> { ... }
    fn offset(&self) -> Option<usize> { ... }
    fn constraint(&self) -> Option<&str> { ... }
}

Expand description

An error that was returned from the database.

Required Methods§

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fn message(&self) -> &str

The primary, human-readable error message.

Provided Methods§

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fn code(&self) -> Option<Cow<'_, str>>

The (SQLSTATE) code for the error.

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fn offset(&self) -> Option<usize>

The byte offset in the query string where the error occurred, if applicable

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fn constraint(&self) -> Option<&str>

Returns the name of the constraint that triggered the error, if applicable. If the error was caused by a conflict of a unique index, this will be the index name.

§Note

Currently only populated by the Postgres driver.

Implementations§

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impl dyn DatabaseError

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pub fn downcast_ref<E: DatabaseError>(&self) -> &E

Downcast a reference to this generic database error to a specific database error type.

§Panics

Panics if the database error type is not E. This is a deliberate contrast from Error::downcast_ref which returns Option<&E>. In normal usage, you should know the specific error type. In other cases, use try_downcast_ref.

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pub fn downcast<E: DatabaseError>(self: Box<Self>) -> Box<E>

Downcast this generic database error to a specific database error type.

§Panics

Panics if the database error type is not E. This is a deliberate contrast from Error::downcast which returns Option<E>. In normal usage, you should know the specific error type. In other cases, use try_downcast.

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