Class: MissingBasePathParamError

API / @xmachines/play-router / errors / MissingBasePathParamError

Defined in: packages/play-url/src/errors.ts:141

Thrown when a :param segment of a basePath has no value in basePathParams.

A base path can be a pattern, so a host keeps one string that mirrors its own route config. The bridge must still resolve that pattern to a concrete prefix, because it writes a real browser URL, and it removes a literal prefix from every inbound location. Every :param therefore needs a value.

How to fix it: give the value that the host resolved already — a loader of TanStack, or a useParams() call, holds it — as basePathParams: { machineId }. An empty string counts as an absent value, because it would collapse the segment.

Error code: PLAY_ROUTER_MISSING_BASE_PATH_PARAM

Example

import { MissingBasePathParamError } from "@xmachines/play-router/errors";

try {
  connectRouter({ actor, router, routeMap, basePath: "/:machineId/play" });
} catch (err) {
  if (err instanceof MissingBasePathParamError) {
    console.error(`basePath needs a value for :${err.param}`);
  }
}

Extends

PlayError

Constructors

Constructor

new MissingBasePathParamError(param, basePath): MissingBasePathParamError;

Defined in: packages/play-url/src/errors.ts:147

Parameters

Parameter	Type
`param`	`string`
`basePath`	`string`

Returns

MissingBasePathParamError

Overrides

PlayError.constructor

Properties

Property	Modifier	Type	Description	Inherited from	Defined in
`basePath`	`readonly`	`string`	The `basePath` option that declares the param.	-	packages/play-url/src/errors.ts:145
`cause?`	`public`	`unknown`	-	`PlayError`.`cause`	-
`code`	`readonly`	`string`	A stable, machine-readable identifier of the error. An error code follows the naming convention `PLAY_<PACKAGE>_<DESCRIPTION>`. It stays the same across each patch release and each minor release of one major version. Never match on `.message`. Always match on `.code`, or on the subclass.	`PlayError`.`code`	packages/play/src/errors.ts:76
`message`	`public`	`string`	-	`PlayError`.`message`	-
`name`	`public`	`string`	-	`PlayError`.`name`	-
`param`	`readonly`	`string`	The name of the `:param` segment without a value, and without its `:`.	-	packages/play-url/src/errors.ts:143
`scope`	`readonly`	`string`	The class or the module that threw this error, for example `"RouterBridgeBase"`.	`PlayError`.`scope`	packages/play/src/errors.ts:66
`stack?`	`public`	`string`	-	`PlayError`.`stack`	-
`stackTraceLimit`	`static`	`number`	The `Error.stackTraceLimit` property specifies the number of stack frames collected by a stack trace (whether generated by `new Error().stack` or `Error.captureStackTrace(obj)`). The default value is `10` but may be set to any valid JavaScript number. Changes will affect any stack trace captured after the value has been changed. If set to a non-number value, or set to a negative number, stack traces will not capture any frames.	`PlayError`.`stackTraceLimit`	-

Methods

captureStackTrace()

static captureStackTrace(targetObject, constructorOpt?): void;

Defined in: @types/node

Creates a .stack property on targetObject, which when accessed returns a string representing the location in the code at which Error.captureStackTrace() was called.

const myObject = {};
Error.captureStackTrace(myObject);
myObject.stack; // Similar to `new Error().stack`

The first line of the trace will be prefixed with ${myObject.name}: ${myObject.message}.

The optional constructorOpt argument accepts a function. If given, all frames above constructorOpt, including constructorOpt, will be omitted from the generated stack trace.

The constructorOpt argument is useful for hiding implementation details of error generation from the user. For instance:

function a() {
  b();
}

function b() {
  c();
}

function c() {
  // Create an error without stack trace to avoid calculating the stack trace twice.
  const { stackTraceLimit } = Error;
  Error.stackTraceLimit = 0;
  const error = new Error();
  Error.stackTraceLimit = stackTraceLimit;

  // Capture the stack trace above function b
  Error.captureStackTrace(error, b); // Neither function c, nor b is included in the stack trace
  throw error;
}

a();

Parameters

Parameter	Type
`targetObject`	`object`
`constructorOpt?`	`Function`

Returns

void

Inherited from

PlayError.captureStackTrace

isError()

static isError(error): error is Error;

Defined in: typescript

Indicates whether the argument provided is a built-in Error instance or not.

Parameters

Parameter	Type
`error`	`unknown`

Returns

error is Error

Inherited from

PlayError.isError

prepareStackTrace()

static prepareStackTrace(err, stackTraces): any;

Defined in: @types/node

Parameters

Parameter	Type
`err`	`Error`
`stackTraces`	`CallSite`[]

Returns

any

See

https://v8.dev/docs/stack-trace-api#customizing-stack-traces

Inherited from

PlayError.prepareStackTrace