Enum FrameworkError 

pub enum FrameworkError {
    ServiceNotFound {
        type_name: &'static str,
    },
    ParamError {
        param_name: String,
    },
    ValidationError {
        field: String,
        message: String,
    },
    Database(String),
    Internal {
        message: String,
    },
    Domain {
        message: String,
        status_code: u16,
    },
    Validation(ValidationErrors),
    Unauthorized,
    ModelNotFound {
        model_name: String,
    },
    ParamParse {
        param: String,
        expected_type: &'static str,
    },
}

Framework-wide error type

This enum represents all possible errors that can occur in the framework. It implements From<FrameworkError> for Response so errors can be propagated using the ? operator in controller handlers.

Example

use ferro_rs::{App, FrameworkError, Response};

pub async fn index(_req: Request) -> Response {
    let service = App::resolve::<MyService>()?;  // Returns FrameworkError on failure
    // ...
}

Automatic Error Conversion

FrameworkError implements From for common error types, allowing seamless use of the ? operator:

use ferro_rs::{DB, FrameworkError};
use sea_orm::ActiveModelTrait;

pub async fn create_todo() -> Result<Todo, FrameworkError> {
    let todo = new_todo.insert(&*DB::get()?).await?;  // DbErr converts automatically!
    Ok(todo)
}

Variants

ServiceNotFound

Service not found in the dependency injection container

Fields

type_name: &'static str

The type name of the service that was not found

ParamError

Parameter extraction failed (missing or invalid parameter)

Fields

param_name: String

The name of the parameter that failed extraction

ValidationError

Validation error

Fields

field: String

The field that failed validation

message: String

The validation error message

Database(String)

Database error

Internal

Generic internal server error

Fields

message: String

The error message

Domain

Domain/application error with custom status code

Used for user-defined domain errors that need custom HTTP status codes.

Fields

message: String

The error message

status_code: u16

HTTP status code

Validation(ValidationErrors)

Form validation errors (422 Unprocessable Entity)

Contains multiple field validation errors in Laravel/Inertia format.

Unauthorized

Authorization failed (403 Forbidden)

Used when FormRequest::authorize() returns false.

ModelNotFound

Model not found (404 Not Found)

Used when route model binding fails to find the requested resource.

Fields

model_name: String

The name of the model that was not found

ParamParse

Parameter parse error (400 Bad Request)

Used when a path parameter cannot be parsed to the expected type.

Fields

param: String

The parameter value that failed to parse

expected_type: &'static str

The expected type (e.g., “i32”, “uuid”)

Implementations

impl FrameworkError

pub fn service_not_found<T: ?Sized>() -> Self

Create a ServiceNotFound error for a given type

pub fn param(name: impl Into<String>) -> Self

Create a ParamError for a missing parameter

pub fn validation(field: impl Into<String>, message: impl Into<String>) -> Self

Create a ValidationError

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

Create a DatabaseError

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

Create an Internal error

pub fn domain(message: impl Into<String>, status_code: u16) -> Self

Create a Domain error with custom status code

pub fn status_code(&self) -> u16

Get the HTTP status code for this error

pub fn validation_errors(errors: ValidationErrors) -> Self

Create a Validation error from ValidationErrors struct

pub fn model_not_found(name: impl Into<String>) -> Self

Create a ModelNotFound error (404)

pub fn param_parse( param: impl Into<String>, expected_type: &'static str, ) -> Self

Create a ParamParse error (400)

pub fn hint(&self) -> Option<String>

Returns an actionable hint guiding the developer toward a fix.

Hints are included in JSON error responses during development to help developers quickly resolve common issues. Variants with user-provided messages (Internal, Domain) or self-describing content (Validation, ValidationError) return None.

Trait Implementations

impl Clone for FrameworkError

fn clone(&self) -> FrameworkError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FrameworkError

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

Formats the value using the given formatter.

impl Display for FrameworkError

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

Formats the value using the given formatter.

impl Error for FrameworkError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<AppError> for FrameworkError

fn from(e: AppError) -> Self

Converts to this type from the input type.

impl From<DbErr> for FrameworkError

fn from(e: DbErr) -> Self

Converts to this type from the input type.

impl From<FrameworkError> for HttpResponse

Auto-convert FrameworkError to HttpResponse

This enables using the ? operator in controller handlers to propagate framework errors as appropriate HTTP responses.

When a hint is available (via FrameworkError::hint()), the JSON response includes a "hint" field with actionable guidance for the developer.

fn from(err: FrameworkError) -> HttpResponse

Converts to this type from the input type.

impl From<ParamError> for FrameworkError

fn from(err: ParamError) -> FrameworkError

Converts to this type from the input type.