Enum Cause 

pub enum Cause {
    NoRows,
    Unreachable,
    NotConfigured,
}

The reason a feed produced nothing — three situations a bare “no data” flattens into one, and which a reader needs told apart.

Variants

NoRows

The feed was READ and is genuinely empty (0 rows / 0 runs / 0 entries). The green case: nothing is broken, there is simply nothing recorded yet.

Unreachable

The feed could not be reached (server down, socket refused, RPC error). NOT the same as empty — an unreachable feed says nothing about what it holds.

NotConfigured

The feed is not wired up in this build/config at all (a missing env var, an unbuilt feature, a vault that was never created).

Implementations

impl Cause

pub fn label(self) -> &'static str

The short word drawn in the badge line.

pub fn tag(self) -> &'static str

The machine word state_json carries.

Trait Implementations

impl Clone for Cause

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Cause

impl Debug for Cause

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Cause

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Cause

impl PartialEq for Cause

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Cause

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 Cause