Struct FormMetadata 

pub struct FormMetadata {
    pub fields: Vec<FieldMetadata>,
    pub initial: HashMap<String, Value>,
    pub prefix: String,
    pub is_bound: bool,
    pub errors: HashMap<String, Vec<String>>,
    pub validation_rules: Vec<ValidationRule>,
    pub non_field_errors: Vec<String>,
}

Available on crate feature pages only.

Serializable form metadata for client-side rendering (Week 5 Day 1)

This structure contains all information needed to render a form on the client-side without requiring the full Form struct with its trait objects.

Fields

• fields: Metadata for each form field
• initial: Initial values for the form (form-level)
• prefix: Field name prefix (for multiple forms on same page)
• is_bound: Whether the form has been bound with data
• errors: Validation errors (if any)
• validation_rules: Client-side validation rules (Phase 2-A)
• non_field_errors: Form-level validation errors (Phase 2-A)

Fields

fields: Vec<FieldMetadata>

Field metadata list

initial: HashMap<String, Value>

Initial values (form-level)

prefix: String

Field name prefix

is_bound: bool

Whether the form has been bound with data

errors: HashMap<String, Vec<String>>

Validation errors (field name -> error messages)

validation_rules: Vec<ValidationRule>

Client-side validation rules (Phase 2-A) These rules enable immediate feedback to users without server round-trips. Server-side validation is still mandatory for security.

non_field_errors: Vec<String>

Non-field errors (form-level errors) (Phase 2-A) These are errors that don’t belong to a specific field (e.g., “Passwords don’t match”)

Trait Implementations

impl Clone for FormMetadata

fn clone(&self) -> FormMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FormMetadata

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FormMetadata

fn deserialize<__D>( __deserializer: __D, ) -> Result<FormMetadata, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for FormMetadata

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

where __S: Serializer,

Serialize this value into the given Serde serializer.