Enum exemplar::OnConflict

#[repr(u8)]
pub enum OnConflict {
    Abort = 0,
    Fail = 1,
    Ignore = 2,
    Replace = 3,
    Rollback = 4,
}

Possible conflict resolution strategies when using Model::insert_or.

The default setting (used by Model::insert) is Abort.

Sourced from the SQLite docs.

Variants

Abort = 0

When an applicable constraint violation occurs, error and revert any changes made by the current SQL statement. Prior SQL statements in the same transaction are unaffected, and the transaction remains active.

This is the default behavior.

Fail = 1

When an applicable constraint violation occurs, error but do not revert any changes made by the current SQL statement. Prior SQL statements in the same transaction are unaffected, and the transaction remains active.

Ignore = 2

When an applicable constraint violation occurs, skip the row that contains the constraint violation and continue processing the current SQL statement. Other rows, prior statements and the current transaction are unaffected.

When encountering a foreign key constraint error, this behaves like Abort.

Replace = 3

• When a uniqueness or primary key constraint violation occurs, delete the offending rows and continue.
• If a NOT NULL constraint violation occurs, the offending column will either be replaced with the default value (if one exists) or Abort behavior will be used.
• If a CHECK or foreign key constraint violation occurs, Abort behavior will be used.

Rollback = 4

When an applicable constraint violation occurs, abort the current SQL statement and roll back the current transaction. If no transaction is active, Abort behavior will be used.

Trait Implementations

impl Clone for OnConflict

fn clone(&self) -> OnConflict

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OnConflict

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

Formats the value using the given formatter.

impl Default for OnConflict

fn default() -> Self

Returns the “default value” for a type.

impl Hash for OnConflict

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for OnConflict

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for OnConflict

impl Eq for OnConflict

impl StructuralEq for OnConflict

impl StructuralPartialEq for OnConflict