isitayush Posts

isitayush

•Created by isitayush on 2/17/2023 in #❓-help

typesafe permissions

Hi, So I wanted to infer all the procedures from my router recursively & assign a permission (string[]) to each one them. I wrote the following,

type GetProceduresRecusivelyAndAssignPermissions<T extends AnyRouter> = {
  [K in keyof T]: T[K] extends AnyProcedure
    ? { permissions: string[] }
    : T[K] extends AnyRouter
    ? GetProceduresRecusivelyAndAssignPermissions<T[K]>
    : never;
};

const permissions: GetProceduresRecusivelyAndAssignPermissions<
  typeof appRouter
> = {
  example: { getData: { permissions: ["canGetData"] } },
};

type GetProceduresRecusivelyAndAssignPermissions<T extends AnyRouter> = {
  [K in keyof T]: T[K] extends AnyProcedure
    ? { permissions: string[] }
    : T[K] extends AnyRouter
    ? GetProceduresRecusivelyAndAssignPermissions<T[K]>
    : never;
};

const permissions: GetProceduresRecusivelyAndAssignPermissions<
  typeof appRouter
> = {
  example: { getData: { permissions: ["canGetData"] } },
};

It works however, I get a red squiggly (error) under the example in my permissions object with the following error message.

Type '{ getData: { permissions: string[]; }; }' is missing the following properties from type 'GetProceduresRecusivelyAndAssignPermissions<CreateRouterInner<RootConfig<{ ctx: ....

Type '{ getData: { permissions: string[]; }; }' is missing the following properties from type 'GetProceduresRecusivelyAndAssignPermissions<CreateRouterInner<RootConfig<{ ctx: ....

In my above type, I am trying to check if the key is a procedure, then simply returning the permissions. Otherwise checking if the key is a router then repeating it recursively. I'm unable to figure out what I'm doing wrong. Can someone help fix this. : )

28 replies

TtRPC

•Created by isitayush on 2/14/2023 in #❓-help

awaiting for procedure & logging the response.

Hi, I was wondering if there is a way to handle the return object via the post-middleware's? I know we could do something like,

const logMiddleware = t.middleware(async ({ ctx, next }) => {
   const res = await next();
   // insert logging here
   return res;
);

const logMiddleware = t.middleware(async ({ ctx, next }) => {
   const res = await next();
   // insert logging here
   return res;
);

However, I want to access the returned result with an event name & log it. This event name could be returned by the procedure itself as one of the key's of res. The problem is I can't access the res object as it's of type MiddlewareResult & is the whole request itself that is returned from a procedure's query/mutation. How should I go about solving this? Is there a way I could destruct the data returned from next() and wrap it in a defined type say something similar to,

type Response = {
  event: "requested_data"; // res.response.type
  request: { ip: res.req.headers.forwarded, ua: ...},
  time: 18214931949,
  data: { type: "query/mutation", path: "procedure path", ctx: res.ctx, input: res.input, response: res.response.message  
 },
}

type Response = {
  event: "requested_data"; // res.response.type
  request: { ip: res.req.headers.forwarded, ua: ...},
  time: 18214931949,
  data: { type: "query/mutation", path: "procedure path", ctx: res.ctx, input: res.input, response: res.response.message  
 },
}

& fill in the fields with my res object. log the response to my db & return res.reponse to my client.

3 replies