Enum EntityStatus 

pub enum EntityStatus {
    New,
    Persisted,
    PersistedDeleted,
    Updated,
    UpdatedDeleted,
    UpdatedRecover,
    Refer,
}

Tracks the lifecycle status of an entity through a state machine.

State transitions follow the Java TeaQL transition table exactly:

Current State	Action	Next State
New	Update	New
New	Persist	Persisted
Persisted	Update	Updated
Persisted	Delete	UpdatedDeleted
PersistedDeleted	Recover	UpdatedRecover
Updated	Update	Updated
Updated	Persist	Persisted
UpdatedDeleted	Persist	PersistedDeleted
UpdatedDeleted	Delete	UpdatedDeleted
UpdatedRecover	Persist	Persisted
UpdatedRecover	Recover	UpdatedRecover

Variants

New

A newly created entity that has not been persisted yet.

Persisted

An entity that has been persisted to the database.

PersistedDeleted

A persisted entity that has been soft-deleted.

Updated

A persisted entity with pending updates.

UpdatedDeleted

A persisted entity that has been updated and then deleted.

UpdatedRecover

A deleted entity that has been recovered (undeleted).

Refer

A reference to an entity managed elsewhere.

Implementations

impl EntityStatus

pub fn next(self, action: EntityAction) -> Result<EntityStatus, String>

Transition to the next status given an action.

Returns Err with a descriptive message for invalid transitions.

pub fn need_persist(&self) -> bool

Returns true if this entity needs to be persisted (i.e. it has pending changes).

Entities with status New, Updated, UpdatedDeleted, or UpdatedRecover need persistence. Persisted, PersistedDeleted, and Refer do not.

pub fn is_new(&self) -> bool

Returns true if this entity is newly created and has never been persisted.

pub fn is_updated(&self) -> bool

Returns true if this entity has been updated since last persistence.

pub fn is_deleted(&self) -> bool

Returns true if this entity is marked for deletion.

pub fn is_recover(&self) -> bool

Returns true if this entity has been recovered from deletion.

Trait Implementations

impl Clone for EntityStatus

fn clone(&self) -> EntityStatus

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EntityStatus

impl Debug for EntityStatus

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

Formats the value using the given formatter.

impl Default for EntityStatus

fn default() -> Self

Returns the “default value” for a type.

impl Display for EntityStatus

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

Formats the value using the given formatter.

impl Eq for EntityStatus

impl Hash for EntityStatus

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 EntityStatus

fn eq(&self, other: &EntityStatus) -> 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 StructuralPartialEq for EntityStatus