Trait diesel::connection::Connection [] [src]

pub trait Connection: SimpleConnection + Sized + Send {
    type Backend: Backend;
    fn establish(database_url: &str) -> ConnectionResult<Self>;

    fn transaction<T, E, F>(&self, f: F) -> Result<T, E>
    where
        F: FnOnce() -> Result<T, E>,
        E: From<Error>
, { ... } fn begin_test_transaction(&self) -> QueryResult<()> { ... } fn test_transaction<T, E, F>(&self, f: F) -> T
    where
        F: FnOnce() -> Result<T, E>
, { ... } }

Perform connections to a backend.

Associated Types

The backend this connection represents.

Required Methods

Establishes a new connection to the database at the given URL. The URL should be a valid connection string for a given backend. See the documentation for the specific backend for specifics.

Provided Methods

Executes the given function inside of a database transaction. When a transaction is already occurring, savepoints will be used to emulate a nested transaction.

The error returned from the function must implement From<diesel::result::Error>.

Creates a transaction that will never be committed. This is useful for tests. Panics if called while inside of a transaction.

Executes the given function inside a transaction, but does not commit it. Panics if the given function returns an Err.

Implementors