Struct Constraint

pub struct Constraint { /* private fields */ }

Implementations

impl Constraint

pub fn new( name: impl ToString, local: Arc<Column>, foreign: Arc<Column>, ) -> Self

Create a new constraint with at least one local and foreign column pair

pub fn name(&self) -> Arc<String>

Get constraint name

pub fn local(&self) -> &Column

Get local column, or local column from first pair

pub fn foreign(&self) -> &Column

Get foreign column, or foreign column from first pair

pub fn add_key_pair( &mut self, local: Arc<Column>, foreign: Arc<Column>, ) -> &mut Constraint

Add a local/foreign column pair

pub fn key_pairs(&self) -> Iter<'_, ConstraintKeyPair>

Get column pairs iterator

pub fn key_pairs_count(&self) -> usize

Get number of pairs

Trait Implementations

impl Clone for Constraint

fn clone(&self) -> Constraint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Constraint

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

Formats the value using the given formatter.

impl Default for Constraint

fn default() -> Constraint

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Constraint

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Constraint

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl WithMetadata for Constraint

fn get_metadata(&self) -> &HashMap<String, String>

Borrow metadata container for reading

fn get_metadata_mut(&mut self) -> &mut HashMap<String, String>

Borrow metadata container for writing

fn set_meta( &mut self, meta_key: impl ToString, meta_value: impl ToString, ) -> &mut Self

Set metadata key value pair

fn set_meta_flag(&mut self, meta_flag: impl ToString) -> &mut Self

Set metadata flag

fn meta_flag(&self, flag: &str) -> bool

Check if metadata flag is set

fn meta(&self, key: &str) -> Option<String>

Get metadata value by key