Enum AppError 

pub enum AppError {
    Validation(String),
    Unauthorized,
    InvalidCredentials,
    TokenError(String),
    Forbidden(String),
    AccountDeactivated,
    NotFound(String),
    Conflict(String),
    RateLimited,
    Database(String),
    Crypto(String),
    Internal(String),
}

Application-level error.

Each variant maps to a specific HTTP status code via ResponseError. See module-level docs for usage guidelines.

Variants

Validation(String)

Input validation failed (bad request payload, missing fields, format errors).

Unauthorized

Authentication required but not provided / token missing.

InvalidCredentials

Provided credentials are invalid. Used uniformly for “email not found” AND “wrong password” to prevent username enumeration attacks.

TokenError(String)

Token expired, malformed, or revoked.

Forbidden(String)

User is authenticated but lacks the required role/permission.

AccountDeactivated

User account exists but is deactivated. NOTE: returning a distinct error from InvalidCredentials may leak account existence — security review needed for auth/login flow.

NotFound(String)

Resource not found (e.g., user by id, building by id).

Conflict(String)

Conflict (e.g., email already in use, ownership total > 100%).

RateLimited

Rate limit exceeded.

Database(String)

Database error (sqlx, connection, query). Internal — not surfaced verbatim to clients.

Crypto(String)

Cryptographic error (bcrypt, JWT signing).

Internal(String)

Catch-all for legacy Result<_, String> propagation. Should be reduced over time as repositories migrate.

Implementations

impl AppError

pub fn kind(&self) -> &'static str

Stable string identifier for the error kind. Used in error_response JSON payload and logging.

Trait Implementations

impl Debug for AppError

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

Formats the value using the given formatter.

impl Display for AppError

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

Formats the value using the given formatter.

impl Error for AppError

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<&str> for AppError

fn from(s: &str) -> Self

Converts to this type from the input type.

impl From<BcryptError> for AppError

fn from(e: BcryptError) -> Self

Converts to this type from the input type.

impl From<Error> for AppError

fn from(e: Error) -> Self

Converts to this type from the input type.

impl From<String> for AppError

Transition convenience: convert legacy String errors from repositories into AppError::Internal. Should be used sparingly via .map_err(AppError::from) at the boundary; prefer dedicated variants when the error semantic is known.

fn from(s: String) -> Self

Converts to this type from the input type.

impl ResponseError for AppError

fn status_code(&self) -> StatusCode

Returns appropriate status code for error.

fn error_response(&self) -> HttpResponse

Creates full response for error.