Struct ConflictChain 

pub struct ConflictChain { /* private fields */ }

An ON CONFLICT clause under construction.

Not a mod until an action is chosen — ON CONFLICT with no DO NOTHING/DO UPDATE is not a clause — so do_nothing or do_update has to be called.

Implementations

impl ConflictChain

pub fn where_(self, predicate: impl IntoExpr) -> ConflictChain

The index predicate: ON CONFLICT (a) WHERE ….

Matched against a partial unique index’s own definition, not evaluated per row — which is why it is a method here and not the where_ mod that filters which conflicting rows get updated. It hangs off the parenthesised column list and cannot stand without one.

pub fn do_nothing(self) -> ConflictMod

DO NOTHING — skip the conflicting row.

pub fn do_update(self, body: impl Mod<ConflictClause>) -> ConflictMod

DO UPDATE SET … — the upsert.

The body is built from mods against ConflictClause, which implements HasSet and HasWhere: set, set_col, set_excluded and where_ all apply, and that where_ is the row filter.

Trait Implementations

impl Clone for ConflictChain

fn clone(&self) -> ConflictChain

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConflictChain

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

Formats the value using the given formatter.