Enum AddFieldOutcome 

pub enum AddFieldOutcome {
    Added,
    AlreadyPresentSameType,
    Conflict {
        existing: FieldType,
    },
}

What happened when a field type was reserved.

This replaces upstream’s error-code sniffing. enforceFieldExists calls addFieldIfNotExists, swallows every error that is not INCORRECT_TYPE, reloads the schema and re-validates (SchemaController.js:1184-1216), which means “another writer won the race with the same type” and “another writer won the race with a different type” are distinguished only by what a second read finds. Making that an enum means a caller cannot conflate them.

Variants

Added

This caller reserved the type.

AlreadyPresentSameType

Someone else got there first, with the same type. Not an error: concurrent writers inferring the same type both succeed upstream.

Conflict

Someone else got there first with an incompatible type. The caller’s write must fail.

Fields

existing: FieldType

Trait Implementations

impl Clone for AddFieldOutcome

fn clone(&self) -> AddFieldOutcome

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AddFieldOutcome

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

Formats the value using the given formatter.

impl Eq for AddFieldOutcome

impl PartialEq for AddFieldOutcome

fn eq(&self, other: &AddFieldOutcome) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for AddFieldOutcome