Struct UniqueConstraintDef 

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

Const-friendly unique constraint definition

Used for multi-column unique constraints (single-column UNIQUEs are on the column).

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 constraint name was explicitly specified

Implementations

impl UniqueConstraintDef

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

Create a new unique constraint definition

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

Set the columns in the unique constraint

pub const fn explicit_name(self) -> Self

Mark the name as explicitly specified

pub const fn into_unique_constraint(self) -> UniqueConstraint

Convert to runtime UniqueConstraint type

Trait Implementations

impl Clone for UniqueConstraintDef

fn clone(&self) -> UniqueConstraintDef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

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 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: &UniqueConstraintDef) -> bool

Tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for UniqueConstraintDef

impl Eq for UniqueConstraintDef

impl StructuralPartialEq for UniqueConstraintDef