Enum ValidationRule 

pub enum ValidationRule {
    MinLength {
        field_name: String,
        min: usize,
        error_message: String,
    },
    MaxLength {
        field_name: String,
        max: usize,
        error_message: String,
    },
    Pattern {
        field_name: String,
        pattern: String,
        error_message: String,
    },
    MinValue {
        field_name: String,
        min: f64,
        error_message: String,
    },
    MaxValue {
        field_name: String,
        max: f64,
        error_message: String,
    },
    Email {
        field_name: String,
        error_message: String,
    },
    Url {
        field_name: String,
        error_message: String,
    },
    FieldsEqual {
        field_names: Vec<String>,
        error_message: String,
        target_field: Option<String>,
    },
    DateRange {
        start_field: String,
        end_field: String,
        error_message: String,
        target_field: Option<String>,
    },
    NumericRange {
        min_field: String,
        max_field: String,
        error_message: String,
        target_field: Option<String>,
    },
    ValidatorRef {
        field_name: String,
        validator_id: String,
        params: Value,
        error_message: String,
    },
}

Validation rule types for client-side validation (Phase 2-A)

These rules enable client-side validation for better UX, while server-side validation remains mandatory for security.

Security Note

Client-side validation is for UX enhancement only and MUST NOT be relied upon for security. Server-side validation is always required.

Design Principle

All validation rules are declarative and type-safe. We do NOT use JavaScript expressions to prevent arbitrary code execution vulnerabilities. Instead, each rule type has specific parameters that are validated in Rust.

Variants

MinLength

Minimum length validation for string fields

Fields

field_name: String

Field name to validate

min: usize

Minimum required length

error_message: String

Error message to display when validation fails

MaxLength

Maximum length validation for string fields

Fields

field_name: String

Field name to validate

max: usize

Maximum allowed length

error_message: String

Error message to display when validation fails

Pattern

Regex pattern validation for string fields

Fields

field_name: String

Field name to validate

pattern: String

Regex pattern to match (must be valid regex)

error_message: String

Error message to display when validation fails

MinValue

Minimum value validation for numeric fields

Fields

field_name: String

Field name to validate

min: f64

Minimum allowed value

error_message: String

Error message to display when validation fails

MaxValue

Maximum value validation for numeric fields

Fields

field_name: String

Field name to validate

max: f64

Maximum allowed value

error_message: String

Error message to display when validation fails

Email

Email format validation

Fields

field_name: String

Field name to validate

error_message: String

Error message to display when validation fails

Url

URL format validation

Fields

field_name: String

Field name to validate

error_message: String

Error message to display when validation fails

FieldsEqual

Cross-field equality validation (e.g., password confirmation)

Fields

field_names: Vec<String>

Field names to compare for equality

error_message: String

Error message to display when validation fails

target_field: Option<String>

Target field for error display (None = non-field error)

DateRange

Date range validation (end_date >= start_date)

Fields

start_field: String

Start date field name

end_field: String

End date field name

error_message: String

Error message to display when validation fails

target_field: Option<String>

Target field for error display

NumericRange

Numeric range validation (max >= min)

Fields

min_field: String

Minimum value field name

max_field: String

Maximum value field name

error_message: String

Error message to display when validation fails

target_field: Option<String>

Target field for error display

ValidatorRef

Reference to reinhardt-validators Validator

Fields

field_name: String

Field name to validate

validator_id: String

Validator identifier (e.g., “email”, “url”, “min_length”)

params: Value

Validator parameters as JSON Example: {“min”: 8, “max”: 20} for MinMaxLengthValidator

error_message: String

Error message to display when validation fails

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.

impl Serialize for ValidationRule

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

where __S: Serializer,

Serialize this value into the given Serde serializer.