Struct ContainmentConstraint 

pub struct ContainmentConstraint { /* private fields */ }

A constraint that checks if values in a column are contained in a set of allowed values.

This constraint validates that all non-null values in a column are members of the specified set of allowed values.

Examples

use term_guard::constraints::ContainmentConstraint;
use term_guard::core::Constraint;

// Check that status values are only "active", "inactive", or "pending"
let constraint = ContainmentConstraint::new("status", vec!["active", "inactive", "pending"]);
assert_eq!(constraint.name(), "containment");

Implementations

impl ContainmentConstraint

pub fn new<I, S>(column: impl Into<String>, allowed_values: I) -> Self

where I: IntoIterator<Item = S>, S: Into<String>,

Creates a new containment constraint.

Arguments

• column - The column to check
• allowed_values - The set of allowed values

Trait Implementations

impl Clone for ContainmentConstraint

fn clone(&self) -> ContainmentConstraint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Constraint for ContainmentConstraint

fn evaluate<'life0, 'life1, 'async_trait>( &'life0 self, ctx: &'life1 SessionContext, ) -> Pin<Box<dyn Future<Output = Result<ConstraintResult>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Evaluates the constraint against the data in the session context.

fn name(&self) -> &str

Returns the name of the constraint.

fn column(&self) -> Option<&str>

Returns the column this constraint operates on (if single-column).

fn metadata(&self) -> ConstraintMetadata

Returns the metadata associated with this constraint.

fn description(&self) -> Option<&str>

Returns a description of what this constraint validates.

impl Debug for ContainmentConstraint

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

Formats the value using the given formatter.