Struct FormValidator 

pub struct FormValidator { /* private fields */ }

Validates complete forms/objects with field-level rules

Supports:

• Nested field paths (e.g., “user.address.street”)
• Early termination on first error
• Async validation with MongoDB

Example

use validate_ro::{FormValidator};
use validate_ro::rules::Rule;

let validator = FormValidator::new()
    .add("username", Rule::required())
    .add("profile.age", Rule::integer());

Implementations

impl FormValidator

pub fn new() -> Self

Creates a new validator that collects all errors

pub fn add(self, field_name: &str, validator: impl Validator + 'static) -> Self

Adds validation rules for a field

Arguments

• field_name - Field path (supports dot notation for nested fields)
• validator - Validation rules

pub fn validate( &self, form_data: &Value, ) -> Result<Document, HashMap<String, Vec<ValidationError>>>

Validates form data synchronously

Returns either:

• Ok(Document) with validated values (including defaults)
• Err(HashMap) with field names and error lists

pub async fn validate_async( &self, db: &Database, form_data: &Value, ) -> Result<Document, HashMap<String, Vec<ValidationError>>>

Validates form data asynchronously with MongoDB access

Used for validators that require database checks (like uniqueness) Returns either:

• Ok(Document) with validated values (including defaults)
• Err(HashMap) with field names and error lists

pub fn break_on_error(self) -> FormValidator