Struct UniqueConstraintDef 

pub struct UniqueConstraintDef {
    pub table: &'static str,
    pub name: &'static str,
    pub columns: &'static [Cow<'static, str>],
    pub name_explicit: bool,
}

A unique constraint that can be built in a const.

TableSql writes a single-column constraint without an explicit name as UNIQUE on the column, and any other as a table constraint.

Examples

use drizzle_types::sqlite::ddl::UniqueConstraintDef;
use std::borrow::Cow;

const COLS: &[Cow<'static, str>] = &[Cow::Borrowed("email"), Cow::Borrowed("tenant_id")];
const UNIQ: UniqueConstraintDef = UniqueConstraintDef::new("users", "uq_email_tenant")
    .columns(COLS);

Fields

table: &'static str

Parent table name

name: &'static str

Constraint name

columns: &'static [Cow<'static, str>]

Columns in the unique constraint

name_explicit: bool

Whether the user gave the constraint name (rather than it being generated)

Implementations

impl UniqueConstraintDef

pub const fn new(table: &'static str, name: &'static str) -> Self

Creates a unique constraint with no columns; set them with columns.

pub const fn columns(self, cols: &'static [Cow<'static, str>]) -> Self

Sets the constrained columns.

pub const fn explicit_name(self) -> Self

Marks the name as given by the user.

pub const fn into_unique_constraint(self) -> UniqueConstraint

Converts to the runtime UniqueConstraint.

Trait Implementations

impl Clone for UniqueConstraintDef

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for UniqueConstraintDef

impl Debug for UniqueConstraintDef

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

Formats the value using the given formatter.

impl Default for UniqueConstraintDef

fn default() -> Self

Returns the “default value” for a type.

impl Eq for UniqueConstraintDef

impl From<UniqueConstraintDef> for UniqueConstraint

fn from(def: UniqueConstraintDef) -> Self

Converts to this type from the input type.

impl Hash for UniqueConstraintDef

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 UniqueConstraintDef

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for UniqueConstraintDef