Struct Schema 

pub struct Schema { /* private fields */ }

Object types and their relations.

Implementations

impl Schema

pub fn new() -> Schema

pub fn relation( self, kind: &str, relation: &str, definition: &str, ) -> Result<Schema, AuthzError>

Define relation on kind as definition (see parse_expression). Names are resolved when the schema is used (Schema::validate), so definitions may refer to types defined later.

pub fn object_type(self, kind: &str) -> Result<Schema, AuthzError>

A type with no relations of its own (e.g. user).

pub fn types(&self) -> Vec<&str>

The type names, sorted.

pub fn relations(&self, kind: &str) -> Vec<&str>

The relation names of kind, sorted.

pub fn has_relation(&self, kind: &str, relation: &str) -> bool

pub fn validate(&self) -> Result<Schema, AuthzError>

Resolve bare names (a type used as a subject type, or else a relation on the same object) and check every reference; returns the resolved schema. Subject types that appear only in definitions (user) become types.

pub fn allows(&self, tuple: &Tuple) -> Result<(), AuthzError>

Whether the schema lets tuple be stored: a known relation whose definition takes this kind of subject directly.

Trait Implementations

impl Clone for Schema

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Schema

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

Formats the value using the given formatter.

impl Default for Schema

fn default() -> Self

Returns the “default value” for a type.