Enum TableConstraint 

#[non_exhaustive]
pub enum TableConstraint {
    PrimaryKey {
        name: Option<Arc<dyn Iden>>,
        columns: Vec<Arc<dyn Iden>>,
    },
    Unique {
        name: Option<Arc<dyn Iden>>,
        columns: Vec<Arc<dyn Iden>>,
    },
    ForeignKey {
        name: Option<Arc<dyn Iden>>,
        columns: Vec<Arc<dyn Iden>>,
        ref_table: Box<TableRef>,
        ref_columns: Vec<Arc<dyn Iden>>,
        on_delete: Option<ForeignKeyAction>,
        on_update: Option<ForeignKeyAction>,
    },
    Check {
        name: Option<Arc<dyn Iden>>,
        expr: SimpleExpr,
    },
}

Available on crate feature database and non-WebAssembly only.

Table constraint

This enum represents various table-level constraints.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

PrimaryKey

PRIMARY KEY constraint

Fields

name: Option<Arc<dyn Iden>>

Constraint name

columns: Vec<Arc<dyn Iden>>

Columns in the primary key

Unique

UNIQUE constraint

Fields

name: Option<Arc<dyn Iden>>

Constraint name

columns: Vec<Arc<dyn Iden>>

Columns that must be unique

ForeignKey

FOREIGN KEY constraint

Fields

name: Option<Arc<dyn Iden>>

Constraint name

columns: Vec<Arc<dyn Iden>>

Columns in this table

ref_table: Box<TableRef>

Referenced table

ref_columns: Vec<Arc<dyn Iden>>

Referenced columns

on_delete: Option<ForeignKeyAction>

ON DELETE action

on_update: Option<ForeignKeyAction>

ON UPDATE action

Check

CHECK constraint

Fields

name: Option<Arc<dyn Iden>>

Constraint name

expr: SimpleExpr

Check expression

Trait Implementations

impl Clone for TableConstraint

fn clone(&self) -> TableConstraint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TableConstraint

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

Formats the value using the given formatter.