#express-schema

A schema parser for express.js. The goal of this lib is to make express.js's request param parsing easier.

Installation

npm install express-schema

Usage

// Express app configuration...
// blabla...

var expressSchema = require('express-schema'),
    schemas = expressSchema.schemas,
    Schema = expressSchema.Schema;

var fooSchema = new Schema({
    foo: schemas.int.gt(3).lt(5).required(), // foo should between 3~5, and not undefined.
    bar: {
        a: [{ val: schemas.string.len(3, 8) }], // val.length should between 3~8.
        b: { val: schemas.date } // val is a Date object.
    }
});

// { foo: '4', bar: { a:[ { val: '6' } ], b: '2014-01-30' } will be parsed as { foo: 4, bar: { a: [ { val: 6 } ], b: Date('2014-01-30') } }

app.all('/foo', function (req, res) {
    try {
        fooSchema.sanitize(req);
        res.jsonp(req.data); // If fooSchema.sanitize success, there will be a 'data' field contains sanitized data.
    } catch (e) {
        res.jsonp(500, e.path + ': ' + e.message); // Echo what's wrong.
    }
});

Schemas

• int
• number
• string
• date
• bool
• ObjectSchema: create by new expressSchema.Schema({ / blabla / })
• ArraySchema: create by new expressSchema.Schema({ foo: [/ blabla /] })

Chained schema

Every schema type have chained methods to add extra validate conditions/sanitize methods.

Common

• default(val) - if result is undefined, use val instead.
• in(arr) - arr.indexOf(result) >= 0.
• notIn(arr) - arr.indexOf(result) < 0.

ObjectSchema

• required() - required.

ArraySchema

• required() - required.
• len(min, max) - min <= array.length <= max.

IntSchema / NumberSchema / DateSchema

• required() - required.
• gt(val) - result > val.
• gte(val) - result >= val.
• lt(val) - result < val.
• lte(val) - result <= val.

StringSchema

• required() - required.
• notEmpty() - result !== '' && result !== undefined.
• len(min, max) - min <= string.length <= max.
• is(pattern) - pattern.test(string) === true.
• not(pattern) - pattern.test(string) === false.
• contains(substr) - string contains substr.
• notContains(substr) - string not contains substr.
• isAlpha() - string is alpha.
• isAlphanumeric() - string is is alpha or numeric.
• isNumeric() - string is is numeric.
• isHex() - string is hex numberic.
• isHexColor() - string is css hex color.
• isLowerCase() - string is in lower case.
• isUpperCase() - string is in upper case.
• isUUID() - string is UUID
• isUUIDv3() - string is UUIDv3
• isUUIDv4() - string is UUIDv4
• isUUIDv5() - string is UUIDv5
• isMd5() - string is MD5.
• isObjectId() - string is mongo ObjectId.
• isEmail() - string is Email.
• isUrl() - string is URL.
• isIPv4() - string is IPV4.
• isIPv6() - string is IPV6.
• toLowerCase() - convert result to lower case.
• toUpperCase() - convert result to upper case.