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

Errors which can occur during Connection::establish

Variants (Non-exhaustive)

This enum is marked as 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

Formats the value using the given formatter. Read more
Formats the value using the given formatter. Read more
👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
The lower-level source of this error, if any. Read more
👎Deprecated since 1.42.0: use the Display impl or to_string()
🔬This is a nightly-only experimental API. (error_generic_member_access)
Provides type based access to context intended for error reports. Read more
Converts to this type from the input type.
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Convert self to an expression for Diesel’s query builder. Read more
Convert &self to an expression for Diesel’s query builder. Read more
🔬This is a nightly-only experimental API. (provide_any)
Data providers should implement this method to provide all values they are able to provide by using demand. Read more
Converts the given value to a String. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.