glerd_valid

Gleam Record validators using Glerd metadata

gleam add --dev glerd glerd_valid

1. Describe your records with validation metadata

Example:

pub type Cat {
  /// valid:name:length:'gte=3, lt=50'
  /// valid:lives_count:self:'min=1, max=9'
  Cat(name: String, lives_count: Int)
}

2. Generate Records info

Use Glerd

3. Make module for validators generation

my_module.gleam

import glerd_valid
import glerd_gen

pub fn main() {
  glerd_gen.record_info
  |> glerd_valid.generate("src", _)
}

4. Gen validators

gleam run -m my_module

Further documentation can be found at https://hexdocs.pm/glerd_valid.

Supported metadata

Operators

operator	description
gte, min	should be greater than or equal to
gt	should be greater than
lte, max	should be less than or equal to
lt	should be less than
eq	should be equal to
ne	should not be equal to

Levels

level	description
self	check on Record field itself
length	check on Record field length

Compatibility

operator	level	type
gte, min	self	Int
gte, min	self	Float
gte, min	length	String
gte, min	length	List
gt	self	Int
gt	self	Float
gt	length	String
gt	length	List
lte, max	self	Int
lte, max	self	Float
lte, max	length	String
lte, max	length	List
lt	self	Int
lt	self	Float
lt	length	String
lt	length	List
eq	self	Int
eq	self	Float
eq	self	String
eq	self	List
eq	self	Bool
eq	length	String
eq	length	List
ne	self	Int
ne	self	Float
ne	self	String
ne	self	List
ne	self	Bool
ne	length	String
ne	length	List

Development

gleam test # and then commit generated file