Struct FieldValidationError 

pub struct FieldValidationError {
    pub field: Option<&'static str>,
    pub message: String,
}

One validation failure attached to a project-driven validate call on ModelAdmin. Either targets a specific field (rendered inline next to its input) or surfaces globally in the form’s error banner.

Plain owned struct — Send + Sync so a Vec<FieldValidationError> can cross await points freely.

Fields

field: Option<&'static str>

Some(name) routes the error to the matching field on the form (rendered next to that input with the existing inline- error styling). None lands the message in the form-level banner — appropriate for cross-field rules (“end date must not be before start date” could attach to either, but a “this booking conflicts with another one” message has no single owning field).

message: String

User-facing message, one sentence. Should not include the field’s own label — the renderer adds it.

Implementations

impl FieldValidationError

pub fn field(field: &'static str, message: impl Into<String>) -> Self

Construct an error attached to one field. field must match an AdminField.name on the model — otherwise the renderer falls through to the global banner.

pub fn global(message: impl Into<String>) -> Self

Construct a global / cross-field error. Renders in the form banner without a field anchor.

Trait Implementations

impl Clone for FieldValidationError

fn clone(&self) -> FieldValidationError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FieldValidationError

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

Formats the value using the given formatter.