enforce
v0.2.0
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NodeJS data validations
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Data Validations
This is the package responsible for data validations in ORM.
Enforce
You can create a list of validations for several properties of an Object
and then run the checks to
see if everything is OK.
var enforce = require("enforce");
var checks = new enforce.Enforce();
checks
.add("name", enforce.notEmptyString())
.add("age", enforce.ranges.number(18, undefined, "under-age"));
checks.check({
name : "John Doe",
age : 16
}, function (err) {
// err should have an error with "msg" = "under-age"
});
You can pass some options in the constructor. One of them is returnAllErrors
which makes the validations
be all checked before returning errors. With this option, if any error is found, even if it's only one, it will be
returned in an Array
.
var enforce = require("enforce");
var checks = new enforce.Enforce({
returnAllErrors : true
});
checks
.add("name", enforce.notEmptyString())
.add("name", enforce.ranges.length(2)) // yes, you can have multiple validators per property
.add("age", enforce.ranges.number(18, undefined, "under-age"));
checks.check({
name : "J",
age : 16
}, function (err) {
console.log(err);
// [ { [Error: "out-of-range-length"], property: "name", value: "J" },
// { [Error: "under-age"], property: "age", value: 16 }]
});
Validators
All validators accept a msg
argument at the end. These argument is the error message returned if the
validation fails. All validators return a Validator
object that is used by Enforce
to support chaining
and other functionality. Validator
objects have a validate
method which is called by Enforce
with the
value of the property in question, a next
callback and an optional global context table which may be used to
pass information between validators.
Required
enforce.required([ msg ])
Checks if a property is not null
and not undefined
. If can be false
, 0
or ""
.
Empty string
enforce.notEmptyString([ msg ])
Checks if a property length is not zero. It can actually work with Array
s.
Same as
enforce.sameAs(property, [ msg ])
Checks if a property has the same (strict) value as another one. This is usefull for testing password matching.
Lists
Inside a list
enforce.lists.inside(list[, msg ])
Checks if the property is inside a list of items.
Outside a list
enforce.lists.outside(list[, msg ])
Checks if the property is not inside a list of items.
Ranges
In a number range
enforce.ranges.number(min[, max[, msg ]])
Checks if a value is inside a specific range of numbers. Either min
or max
can be set to undefined
meaning
that range side is Infinity
.
Please note that this does not check for the type of value passed, you can even use this with Date
objects.
In a length range
enforce.ranges.length(min[, max[, msg ]])
Does the same as the above but for the length
property.
Security
Username
enforce.security.username([[ opts, ]msg ])
Checks if a value matches a username format. opts
is also optional and is an object with the following keys:
length
: the minimal length of the username (default = 2)expr
: the regular expression to be used to match a valid username (if not passed, it's built based on the minimal length)
Password
enforce.security.password([[ checks, ]msg ])
Checks if a value has some types of characters and a minimal length. checks
has a default string luns6
which means:
l
: lowercase lettersu
: uppercase lettersn
: numberss
: special characters6
: minimal length of 6
You can of course change this to "lu4" (lowercase, uppercase, minimal length of 4). Please note that if you pass only one argument
to this validator, it will assume it's the msg
argument. If you want to change the default checks, you have to pass both arguments.
Credit Card
enforce.security.creditcard([[ types, ] msg ])
Checks if a value is a valid credit card number. It supports amex
(American Express), visa
, maestro
, discover
and mastercard
.
You can change the list of supported cards (types
) by passing a list with only some of them. You can also pass luhn
which will ignore card
prefixes and lenght and only pass the number using the Luhn algorithm.
Patterns
Match
enforce.patterns.match(pattern, modifiers[, msg ])
Checks if property passes a specific regular expression. You can pass the pattern
as a RegExp
object (setting modifiers
as null
)
or just pass a regular expression and it will be converted.
Hex string
enforce.patterns.hexString([ msg ])
Checks if a property matches a predefined RegExp
object accepting insensitive hexadecimal characters.
enforce.patterns.email([ msg ])
Checks if a property matches a predefined RegExp
object accepting valid e-mail addresses.
IPv4
enforce.patterns.ipv4([ msg ])
Checks if a property matches a predefined RegExp
object accepting valid IPv4 address.
IPv6
enforce.patterns.ipv6([ msg ])
Checks if a property matches a predefined RegExp
object accepting valid IPv6 address.
MAC
enforce.patterns.mac([ msg ])
Checks if a property matches a predefined RegExp
object accepting valid MAC address.
UUID v3
enforce.patterns.uuid3([ msg ])
Checks if a property matches a predefined RegExp
object accepting valid UUID version 3.
UUID v4
enforce.patterns.uuid4([ msg ])
Checks if a property matches a predefined RegExp
object accepting valid UUID version 4.
Chaining
Enforce
supports chaining operations on all Validator
objects, these allow you to add additional common
conditions to each validation step. All chain operations return Validator
objects, allowing you to chain
multiple commands together with ease.
ifDefined
validation.ifDefined()
Only proceedes to check the validation
if the property's value is not null
or undefined
, passing validation
if it is.
ifNotEmptyString
validation.ifNotEmptyString()
Only proceedes to check the validation
if the property's value is a string
with a length greater than 0.
ifType
validation.ifType(type)
Only proceedes to check the validation
if the property's value is of the specified type. Checked with a typeof value == type
operation.
ifNotType
validation.ifNotType(type)
Only proceedes to check the validation
if the property's value is not of the specified type. Checked with a typeof value != type
operation.