Struct ValidationRule 

pub struct ValidationRule {
    pub logic: Value,
    pub message: Template,
    pub compiled_logic: Option<Arc<Logic>>,
}

A single validation rule with a condition and error message.

The rule’s logic is evaluated against the message context. If it does not return exactly true, the validation fails and the error message is recorded.

Fields

logic: Value

JSONLogic expression that must evaluate to true for validation to pass. Any other result (false, null, etc.) is considered a validation failure.

message: Template

Error message to display if validation fails.

Required when a rule is deserialized as part of a workflow definition — which is the path Engine::build takes, so a rule without it is rejected at build time. ValidationConfig::from_json, the standalone parser, is the one path that substitutes "Validation failed".

JSONLogic, so a message can name the value that failed: {"cat": ["age must be positive, got ", {"var": "data.age"}]}. A plain string is a literal, so the static spelling is unchanged.

Evaluated only when the rule fails, so a passing validation — the common case — costs nothing for a computed message.

This message is recorded in Message::errors, which is serialized, so it may not read a secret. Engine::build refuses one that does; see crate::IssueCode::SecretInMessageWrite.

compiled_logic: Option<Arc<Logic>>

Pre-compiled JSONLogic, populated by LogicCompiler. None is recorded as a COMPILATION_ERROR at execute time.

Trait Implementations

impl Clone for ValidationRule

fn clone(&self) -> ValidationRule

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ValidationRule

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ValidationRule

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.