ferro_rs/validation/
rule.rs

1//! Validation rule trait.
2
3use serde_json::Value;
4
5/// A validation rule that can be applied to a field.
6pub trait Rule: Send + Sync {
7    /// Validate the given value.
8    ///
9    /// Returns `Ok(())` if validation passes, or `Err(message)` if it fails.
10    fn validate(&self, field: &str, value: &Value, data: &Value) -> Result<(), String>;
11
12    /// Get the rule name for error messages.
13    fn name(&self) -> &'static str;
14}

ferro_rs/validation/rule.rs

ferro_rs/validation/
rule.rs