Struct RuleContext 

pub struct RuleContext<'a> {
    pub value: &'a Value,
    pub rule_param: &'a Value,
    pub messages: Option<&'a Value>,
    pub rule_name: &'a str,
    pub path_segments: &'a [String],
    pub row_keys: &'a [usize],
    pub form_data: &'a Value,
    /* private fields */
}

The per-rule invocation context handed to a rule function.

Fields

value: &'a Value

The field value being validated (scalar, array, or the whole array for an array-level rule).

rule_param: &'a Value

The EFFECTIVE rule param (already resolved from any expression/condition map). Never an expression for evaluated rules; verbatim for path/pattern/ literal rules.

messages: Option<&'a Value>

The field’s messages override map, if any.

rule_name: &'a str

The invoked rule name (so pattern/match aliasing resolves messages by the actual key used).

path_segments: &'a [String]

The absolute path segments of the current field (for relative path refs).

row_keys: &'a [usize]

The positions of the row keys in path_segments.

form_data: &'a Value

The full form data tree (for path-reference rules and unique siblings).