Crate use_pg_constraint 

use-pg-constraint

PostgreSQL constraint primitives for RustUse.

This crate provides constraint names, kinds, deferrability labels, constrained columns, referenced table metadata, and expression labels. It does not generate or execute SQL.

Example

use use_pg_column::PgColumnName;
use use_pg_constraint::{PgConstraint, PgConstraintKind, PgConstraintName, PgDeferrability, PgInitially};

let constraint = PgConstraint::new(PgConstraintKind::PrimaryKey)
    .with_name(PgConstraintName::new("users_pkey")?)
    .with_columns(vec![PgColumnName::new("id")?])
    .with_deferrability(PgDeferrability::deferrable(PgInitially::Immediate));

assert_eq!(constraint.to_string(), "CONSTRAINT users_pkey PRIMARY KEY");
assert_eq!(constraint.columns().len(), 1);
assert!(constraint.deferrability().is_deferrable());

Structs

PgConstraint

PostgreSQL constraint metadata without database introspection.

PgConstraintName

PostgreSQL constraint name primitive.

PgDeferrability

PostgreSQL constraint deferrability metadata.

Enums

PgConstraintError

Error returned when PostgreSQL constraint metadata is invalid.

PgConstraintKind

PostgreSQL constraint kind labels.

PgInitially

Initial timing label for deferrable PostgreSQL constraints.