Enum ConnectionError

#[non_exhaustive]
pub enum ConnectionError {
    InvalidCString(NulError),
    BadConnection(String),
    InvalidConnectionUrl(String),
    CouldntSetupConfiguration(Error),
}

Errors which can occur during Connection::establish

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.

InvalidCString(NulError)

The connection URL contained a NUL byte.

BadConnection(String)

The database returned an error.

InvalidConnectionUrl(String)

The connection URL could not be parsed.

CouldntSetupConfiguration(Error)

Diesel could not configure the database connection.

Diesel may try to automatically set session specific configuration values, such as UTF8 encoding, or enabling the || operator on MySQL. This variant is returned if an error occurred executing the query to set those options. Diesel will never affect global configuration.

Trait Implementations

impl Debug for ConnectionError

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

Formats the value using the given formatter.

impl Display for ConnectionError

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

Formats the value using the given formatter.

impl Error for ConnectionError

fn cause(&self) -> Option<&dyn StdError>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

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 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<ConnectionError> for Error

Available on crate feature r2d2 only.

fn from(other: ConnectionError) -> Self

Converts to this type from the input type.

impl From<NulError> for ConnectionError

fn from(e: NulError) -> Self

Converts to this type from the input type.

impl PartialEq for ConnectionError

fn eq(&self, other: &ConnectionError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ConnectionError