Enum DatabaseBackend 

pub enum DatabaseBackend {
    Postgres,
    Sqlite,
}

Which database engine a configured connection target names.

Autumn recognizes two backends. Postgres is the default runtime; SQLite (issue #1614) is served by the runtime built with the crate’s sqlite cargo feature. Detection here is backend-neutral and always compiled, so a SQLite target validates on either build; a build that cannot serve the detected backend refuses at pool construction with a message naming the feature (see create_pool).

Detection rules

DatabaseBackend::detect classifies a target string by its scheme:

• postgres:// / postgresql:// URLs, and libpq keyword/value strings (host=db user=app sslmode=require), are Postgres — exactly the shapes the connection pool already accepts.
• sqlite://<path>, sqlite:<path>, and file:<path> targets are Sqlite. sqlite:// is the canonical, unambiguous form and should be preferred.
• Anything else (including a bare filesystem path like /var/lib/app.db) is deliberately not recognized and returns None. A bare path is ambiguous — it carries no scheme distinguishing it from a typo’d URL — so callers must spell SQLite targets with an explicit sqlite:// (or sqlite: / file:) scheme.

Variants

Postgres

PostgreSQL — the default runtime backend.

Sqlite

SQLite — served by a build compiled with the sqlite feature (issue #1614); refused at pool construction by any other build.

Implementations

impl DatabaseBackend

pub fn detect(target: &str) -> Option<Self>

Detect the backend named by a database target string, or None when the target matches no recognized shape. See the type docs for the full rule table, including why a bare filesystem path is not recognized.

Trait Implementations

impl Clone for DatabaseBackend

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for DatabaseBackend

impl Debug for DatabaseBackend

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

Formats the value using the given formatter.

impl Display for DatabaseBackend

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

Formats the value using the given formatter.

impl Eq for DatabaseBackend

impl PartialEq for DatabaseBackend

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DatabaseBackend