Validate

Library

Updated 2 months ago · v1.3.7

Shared Module

Build validation chains to assert value types, ranges, and custom constraints.

validate

Creates a new validation chain for a value.

lua

local name = validate(playerName).string(32).min(1).done()
local count = validate(amount).number().min(1).max(100).done()

Methods

Method	Parameters	Description
`.string(len?)`	`len: number` — optional max length	Assert value is a string
`.number()`	—	Assert value is a number
`.boolean()`	—	Assert value is a boolean
`.min(min)`	`min: number`	Minimum value (number) or minimum length (string)
`.max(max)`	`max: number`	Maximum value (number) or maximum length (string)
`.refine(fn, err?)`	`fn: function(value) → boolean`, `err: string`	Custom validation function
`.default(value)`	`value: any`	Use this value if the input is `nil`
`.done()`	—	Finalize and return the raw value

The chain can also be called directly — validate(x).string()() is equivalent to .done().

Example

lua

local function processPayment(data)
    local amount = validate(data.amount).number().min(1).max(10000).done()
    local note = validate(data.note).string(200).default('').done()
    local rush = validate(data.rush).boolean().default(false).done()
    
    -- Custom validation
    local code = validate(data.code).string().refine(function(v)
        return #v == 6
    end, 'Code must be 6 characters').done()
end

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This page was last updated on 12 March 2026

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Methods

Example