What steps can I take to resolve the issues with these typescript errors?

An issue arises with type 'string' as it does not meet the constraint 'unknown[]':

      const query = db.prepareQuery<string>(

TS2707 [ERROR]: The generic type 'RouterContext<R, P, S>' needs to have between 1 and 3 type arguments.

  { request, response, state }: RouterContext,

TS2532 [ERROR]: There is a possibility of object being 'undefined'.

    data.negative = negative.map((w) => w.word);

After upgrading my deno API using Oak to Deno 1.18, all these errors started occurring.

Answer №1

Here is the definition of RouterContext interface:


export interface RouterContext<
  R extends string,
  P extends RouteParams<R> = RouteParams<R>,
  // deno-lint-ignore no-explicit-any
  S extends State = Record<string, any>,
> extends Context<S> {
  /** When matching the route, an array of the capturing groups from the regular expression. */
  captures: string[];

  /** The routes that were matched for this request. */
  matched?: Layer<R, P, S>[];

  /** Any parameters parsed from the route when matched. */
  params: P;

  /** A reference to the router instance. */
  router: Router;

  /** If the matched route has a `name`, the matched route name is provided here. */
  routeName?: string;

  /** Overrides the matched path for future route middleware, when a `routerPath` option is not defined on the `Router` options. */
  routerPath?: string;
}

To resolve errors, ensure to provide types as specified in the interface. Alternatively, you can use the following code snippet:

{ request, response, state }: RouterContext<string,any,any>,

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