Struct StateField 

pub struct StateField {
    pub field: String,
    pub value: Value,
    pub identifying: bool,
}

One value a case holds, as the stage that ANSWERS may state it.

Why a workflow declares this and the runtime does not read it

The composer knows what every case still NEEDS — obligations travel on the view and reach the writer as facts — and nothing at all about what it already HAS. So a question the user asks about their own record («what did you save as the company name?») arrives at the answering stage with the list of missing fields, the sources, and no answer in it. What comes back is «nothing is set», in good faith, over a record that holds the value.

The state itself cannot be handed over wholesale: it is the workflow’s own type, it may carry values a person must not be told back, and a JSON dump is not a fact. So the workflow says which of its values are sayable and under which name, and the runtime turns each into a NarratableFact::StateValue — the variant that has existed for exactly this and that nothing filled.

Returning nothing, the default, keeps the previous behaviour.

Fields

field: String

The path the workflow names it with.

value: Value

The value, as the writer may state it.

identifying: bool

Whether it tells this record apart from others of its workflow, such as a number or a counterpart’s name. Identifying fields are what a record is shown by when the model has to choose among several.

Implementations

impl StateField

pub fn new(field: impl Into<String>, value: Value) -> Self

A field named field holding value.

pub const fn identifying(self) -> Self

Marks the field as telling this record apart from others.

Trait Implementations

impl Clone for StateField

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 StateField

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StateField

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for StateField

impl PartialEq for StateField

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for StateField

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for StateField