A module for making chained validations. Create your objects, append your tests, use and reuse it!
Originally bundled with Sailor MVC Web Framework, now released as a separated module. https://github.com/Etiene/sailor
This module provides tools for validating values, very useful in forms, but also usable elsewhere. It works in appended chains. Create a new validation object and start chaining your test functions. If your value fails a test, it breaks the chain and does not evaluate the rest of it. It returns a boolean and an error string (nil when tests succeeded).
Valua is also available through luarocks
luarocks install valua
Example 1 - Just create, chain and use:
valua:new().type("string").len(3,5)("test string!") -- false, "should have 3-5 characters"Example 2 - Create, chain and later use it multiple times:
local reusable_validation = valua:new().type("string").len(3,5)
reusable_validation("test string!") -- false, "should have 3-5 characters"
reusable_validation("test!") -- true- alnum() - Checks if string is alphanumeric.
- boolean() - Checks if value is a boolean.
- compare(another_value) - Checks if value is equal to another value.
- contains(substr) - Checks if a string contains a substring.
- date() or date(format) - Checks if a string is a valid date. Default format is UK (dd/mm/yyyy). Also checks for US and ISO formats.
- email() - Checks if a string is a valid email address.
- empty() - Checks if a value is empty.
- integer() - Checks if a number is an integer;
- in_list(list) - Checks if a value is inside an array.
- len(min,max) - Checks if a string's length is between min and max.
- match(pattern) - Checks if a string matches a given pattern.
- max(n) - Checks if a number is equal or less than n.
- min(n) - Checks if a number is equal or greater than n.
- not_empty() - Checks if a value is not empty.
- no_white() - Checks if a string contains no white spaces.
- number() - Checks if a value is a number.
- string() - Checks if a value is a string.
- type(t) - Checks if a value is of type t.
- optional(t) -
If value is
nilit would be accepted. If it's notnilit would be processed with other chained validation functions as usually done.
Copyright (c) 2014 Etiene Dalcol
License: MIT
Inspired by Respect Validation for PHP
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