What is the best way to retrieve a variable from a ReaderTaskEither within an error handling function using fp-ts?

I'm facing a challenge with my code that involves the usage of ReaderTaskEither:

export const AddUserToTeam = ({ userId, teamId }: AddUserToTeamDto) => {
    return pipe(
        // 👇 Uses ReaderTaskEither
        Do,
        bind("deps", () => ask<Deps>()),
        bind("tx", ({ deps }) => fromTask(deps.createTransaction())),
        bind("addToTeams", ({ deps, tx }) => {
            return fromTaskEither(
                // ...
            );
        }),
        bindW("result", ({ deps, tx }) => {
            return fromTaskEither(
                deps.dispatcher.create(
                    // ...
                )({ tx })
            );
        }),
    );
};

My specific issue arises when I try to handle errors by calling rollback on the interactive transaction (tx) inside a fold or mapLeft, but I can't access the context containing tx in either. How can I maintain a reference to tx for handling errors?

It's important to note that I can't include tx in Deps since transactions are not used universally (they are optional).

Answer â„–1

If you want to achieve this in a "nested level", you should do it after the creation of tx. Based on your code snippet:

export const AddUserToTeam = ({ userId, teamId }: AddUserToTeamDto) => {
  return pipe(
    Do,
    bind("deps", () => ask<Deps>()),
    bind("tx", ({ deps }) => fromTask(deps.createTransaction())),
    chain(({ deps, tx }) =>
      pipe(
        fromTaskEither(/*...*/),
        chain((addToTeams) =>
          fromTaskEither(deps.dispatcher.create(/*...*/)({ tx })),
        ),
        orElse((e) => fromTaskEither(tx.rollback())),
      ),
    ),
  );
};

I had to assume the return type of tx.rollback, as it was not specified.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Leveraging mongoose populate in a Node.js environment with TypeScript

I am struggling to solve this issue. I am currently working on a node express mongoose server with code written in TypeScript and encountering the following error: Property 'populate' does not exist on type 'Document | Aggregate | Model | ...

Is there a way to communicate with the Microsoft bot from within the bot itself, ensuring that the message follows the dialog flow and receives the appropriate response?

It would make more sense if the title of this were "how can I ensure the bot responds smoothly in case context is lost or there's a server restart during a user interaction with the bot. It's confusing as it is and I need to break down the planni ...

The Vue event was triggered, however there was no response

My current project consists of a Typescript + Vue application with one parent object and one component, which is the pager: //pager.ts @Component({ name: "pager", template: require("text!./pager.html") }) export default class Pager extends Vue { ...

The successful operation of 'Ionic serve --lab' may involve the need to manually save the app.module

We are currently working on an Ionic project that consists of several pages and a single custom provider named request.ts. The issue we are facing is that whenever we launch it using the command ionic serve --lab, the compilation fails (with the error poin ...

What is the best way to verify if the ReactDOM.render method has been invoked with a React component as an argument

Here's the code snippet: index.tsx: import React, { Component } from 'react'; import ReactDOM from 'react-dom'; export function Loading(props) { return <div {...props}>loading...</div>; } export class MyComponent e ...

Stopping or pausing an HTML5 audio element in Angular with component.ts

Is there a way to create a custom function in my component.ts file to pause an HTML audio element? I can't seem to find any built-in methods for pausing audio when using document.getElement. <audio controls id="audio-file" > <source src="sam ...

Ways to verify the presence of isBrowser in Angular 4

Previously, isBrowser from Angular Universal could be used to determine if your page was being rendered in a browser (allowing for usage of features like localStorage) or if it was being pre-rendered on the server side. However, it appears that angular2-u ...

Angular Update Component on Input ChangeEnsuring that the component is automatically

<div class=" card-body"> <div class="row"> <div class=" font-icon-list col-lg-2 col-md-3 col-sm-4 col-xs-6 col-xs-6" routerLinkActive="active" *ngFor="let subject of subjects"> <div class=" fon ...

No matter which port I try to use, I always receive the error message "listen EADDRINUSE: address already in use :::1000"

Encountered an error: EADDRINUSE - address already in use at port 1000. The issue is within the Server setupListenHandle and listenInCluster functions in the node.js file. I am currently running this on a Mac operating system, specifically Sonoma. Despit ...

The W3C Validator has found a discrepancy in the index.html file, specifically at the app-root location

While attempting to validate my HTML page, I encountered the following error: Error: Element app-root not allowed as child of element body in this context. (Suppressing further errors from this subtree.) From line 4347, column 7; to line 4347, column 16 ...

Could someone provide a detailed explanation of exhaustMap in the context of Angular using rxjs?

import { HttpHandler, HttpInterceptor, HttpParams, HttpRequest, } from '@angular/common/http'; import { Injectable } from '@core/services/auth.service'; import { exhaustMap, take } from 'rxjs/operators'; import { Authe ...

Error encountered: NextJs could not find the specified module, which includes Typescript and SCSS

I am in the process of migrating a Next.js application from .js to .ts and incorporating ScSS. The first error I encounter is during 'npm run dev'. However, when I try 'npm run build', different issues arise that do not seem related to ...

Generating images with HTML canvas only occurs once before stopping

I successfully implemented an image generation button using Nextjs and the HTML canvas element. The functionality works almost flawlessly - when a user clicks the "Generate Image" button, it creates an image containing smaller images with labels underneath ...

What could be causing the Typescript error when utilizing useContext in combination with React?

I am currently working on creating a Context using useContext with TypeScript. I have encapsulated a function in a separate file named MovieDetailProvider.tsx and included it as a wrapper in my App.tsx file. import { Context, MovieObject } from '../in ...

What is the best way to create a function that can securely search for a URL containing parameters while ensuring type safety?

I am working on a NextJS/React application. We have a large object containing internal URLs, each with a createPath function that looks similar to this: const URLS = { dashboard: { createPath: ({ accountNumber }: { accountNumber: string }) => ...

I encountered an eslint error when I was trying to configure Vue 3 + Quasar with a Firebase config.ts file. The error stated that there was an unsafe assignment of an `

Recently, I set up a new Vue 3 project with Quasar using the Quasar CLI. In order to store my firebase configuration, I created a new file called src/firebase/config.ts, which looks like this: // Import necessary functions from SDKs import { initializeApp ...

The error message "Cannot bind to 'ngForOf' because it is not recognized as a valid property of the element."

After utilizing NGFor for quite some time, I encountered an unexpected issue in a new application where I received the error message: Can't bind to 'ngForOf' since it isn't a known property of 'div'.' I found it strang ...

TypeScript: implementing function overloading in an interface by extending another interface

I'm currently developing a Capacitor plugin and I'm in the process of defining possible event listeners for it. Previously, all the possible event listeners were included in one large interface within the same file: export interface Plugin { ...

Is it true that "Conditional types" are not compatible with actual functions?

Checking out https://www.typescriptlang.org/docs/handbook/2/conditional-types.html I'm curious as to why this code is not functioning properly? interface IdLabel { id: number } interface NameLabel { name: string } type NameOrId<T extends num ...

React with Typescript - Type discrepancies found in Third Party Library

Recently, I encountered a scenario where I had a third-party library exporting a React Component in a certain way: // Code from the third party library that I cannot alter export default class MyIcon extends React.Component { ... }; MyIcon.propTypes = { ...