https://github.com/sporto/gleam-valid

Validation library for Gleam
https://github.com/sporto/gleam-valid

gleam gleam-lang

Last synced: about 2 months ago
JSON representation

Validation library for Gleam

• Host: GitHub
• URL: https://github.com/sporto/gleam-valid
• Owner: sporto
• License: apache-2.0
• Created: 2020-10-16T01:07:45.000Z (almost 4 years ago)
• Default Branch: main
• Last Pushed: 2024-07-23T13:27:48.000Z (about 2 months ago)
• Last Synced: 2024-08-01T03:47:37.543Z (about 2 months ago)
• Topics: gleam, gleam-lang
• Language: Gleam
• Homepage: https://hexdocs.pm/valid
• Size: 108 KB
• Stars: 25
• Watchers: 4
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-gleam - valid - [📚](https://hexdocs.pm/valid/) - A composable validation library for Gleam (Packages / Validation)

README

        
# Valid

![CI](https://github.com/sporto/gleam-valid/workflows/test/badge.svg?branch=main)

A validation library for [Gleam](https://gleam.run/).

API Docs: .

This library follows the principle [Parse don't validate](https://lexi-lambda.github.io/blog/2019/11/05/parse-don-t-validate/).

```gleam

fn user_validator(user: InputUser) -> ValidatorResult(ValidUser, String) {

  valid.build3(ValidUser)

  |> valid.check(user.name, valid.is_some("Please provide a name"))

  |> valid.check(user.email, valid.is_some("Please provide an email"))

  |> valid.check(user.age, valid.ok())

}

case user_valid(input) {

  Ok(valid_user) -> ...

  Error(errors) -> ...

}

```

## Install

```

gleam add valid

```

## Usage and Examples

- For basic usage see 

### Validators

- For string validators, see 

- For int validators, see 

- For list validators, see 

- For optional validators, see 

- For creating a custom validator, see 

### Composition

- For composing validators, see 

### Other

- For validating a dictionary, see 

- For custom error types, see 

- For validating a whole structure, see