Struct FindUnique 

pub struct FindUnique<'a, M: 'static, PK: 'static> { /* private fields */ }

Implementations

impl<'a, M: 'static, PK: 'static> FindUnique<'a, M, PK>

pub fn for_update(self) -> Self

Emit SELECT ... FOR UPDATE. See FindMany::for_update for the tx-pairing caveat.

pub fn as_detail(self) -> Self

Evaluate against the schema’s detail policy slice (the default for find_unique). A no-op when called explicitly, kept for API symmetry with Self::as_list.

pub fn as_list(self) -> Self

Evaluate against the schema’s read/list policy slice instead of detail. Use when the call site needs list-style permission semantics on a unique-key lookup.

pub fn preview_sql(&self) -> String

pub fn preview_scoped_sql(&self, ctx: &CoolContext) -> String

pub async fn run(self, ctx: &CoolContext) -> Result<Option<M>, CoolError>

where for<'r> M: Send + Unpin + FromRow<'r, PgRow>, PK: Send + Type<Postgres> + for<'q> Encode<'q, Postgres>,

pub async fn run_in_tx<'tx>( self, tx: &mut Transaction<'tx, Postgres>, ctx: &CoolContext, ) -> Result<Option<M>, CoolError>

where for<'r> M: Send + Unpin + FromRow<'r, PgRow>, PK: Send + Type<Postgres> + for<'q> Encode<'q, Postgres>,

impl<'a, M: 'static, PK: 'static> FindUnique<'a, M, PK>

pub fn select<I, C>(self, columns: I) -> ProjectedFindUnique<'a, M, PK>

where I: IntoIterator<Item = C>, C: IntoColumnName,

Restrict the SELECT to the named columns. Resolves to Option<Projection<M>> rather than Option<M>; non-selected fields on the inner M hold Default::default().

Trait Implementations

impl<'a, M: Clone + 'static, PK: Clone + 'static> Clone for FindUnique<'a, M, PK>

fn clone(&self) -> FindUnique<'a, M, PK>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a, M: Debug + 'static, PK: Debug + 'static> Debug for FindUnique<'a, M, PK>

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

Formats the value using the given formatter.