Package validator ================ [![Join the chat at https://gitter.im/bluesuncorp/validator](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/bluesuncorp/validator?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [![Build Status](https://travis-ci.org/bluesuncorp/validator.svg?branch=v6)](https://travis-ci.org/bluesuncorp/validator) [![Coverage Status](https://coveralls.io/repos/bluesuncorp/validator/badge.svg?branch=v6)](https://coveralls.io/r/bluesuncorp/validator?branch=v6) [![GoDoc](https://godoc.org/gopkg.in/bluesuncorp/validator.v6?status.svg)](https://godoc.org/gopkg.in/bluesuncorp/validator.v6) Package validator implements value validations for structs and individual fields based on tags. It has the following **unique** features: - Cross Field and Cross Struct validations. - Slice, Array and Map diving, which allows any or all levels of a multidimensional field to be validated. - Handles type interface by determining it's underlying type prior to validation. Installation ------------ Use go get. go get gopkg.in/bluesuncorp/validator.v6 or to update go get -u gopkg.in/bluesuncorp/validator.v6 Then import the validator package into your own code. import "gopkg.in/bluesuncorp/validator.v6" Usage and documentation ------ Please see http://godoc.org/gopkg.in/bluesuncorp/validator.v6 for detailed usage docs. ##### Example: ```go package main import ( "fmt" "gopkg.in/bluesuncorp/validator.v6" ) // User contains user information type User struct { FirstName string `validate:"required"` LastName string `validate:"required"` Age uint8 `validate:"gte=0,lte=130"` Email string `validate:"required,email"` FavouriteColor string `validate:"hexcolor|rgb|rgba"` Addresses []*Address `validate:"required,dive,required"` // a person can have a home and cottage... } // Address houses a users address information type Address struct { Street string `validate:"required"` City string `validate:"required"` Planet string `validate:"required"` Phone string `validate:"required"` } var validate *validator.Validate func main() { config := validator.Config{ TagName: "validate", ValidationFuncs: validator.BakedInValidators, } validate = validator.New(config) address := &Address{ Street: "Eavesdown Docks", Planet: "Persphone", Phone: "none", } user := &User{ FirstName: "Badger", LastName: "Smith", Age: 135, Email: "Badger.Smith@gmail.com", FavouriteColor: "#000", Addresses: []*Address{address}, } // returns nil or ValidationErrors ( map[string]*FieldError ) errs := validate.Struct(user) if errs != nil { fmt.Println(errs) // output: Key: "User.Age" Error:Field validation for "Age" failed on the "lte" tag // Key: "User.Addresses[0].City" Error:Field validation for "City" failed on the "required" tag err := errs["User.Addresses[0].City"] fmt.Println(err.Field) // output: City fmt.Println(err.Tag) // output: required fmt.Println(err.Kind) // output: string fmt.Println(err.Type) // output: string fmt.Println(err.Param) // output: fmt.Println(err.Value) // output: // from here you can create your own error messages in whatever language you wish return } // save user to database } ``` Benchmarks ------ ###### Run on MacBook Pro (Retina, 15-inch, Late 2013) 2.6 GHz Intel Core i7 16 GB 1600 MHz DDR3 NOTE: allocations for structs are up from v5, however ns/op for parallel operations are way down. It was a decicion not to cache struct info because although it reduced allocation to v5 levels, it hurt parallel performance too much. ```go $ go test -cpu=4 -bench=. -benchmem=true PASS BenchmarkField-4 5000000 314 ns/op 16 B/op 1 allocs/op BenchmarkFieldOrTag-4 500000 2425 ns/op 20 B/op 2 allocs/op BenchmarkStructSimple-4 500000 3117 ns/op 553 B/op 14 allocs/op BenchmarkStructSimpleParallel-4 1000000 1149 ns/op 553 B/op 14 allocs/op BenchmarkStructComplex-4 100000 19580 ns/op 3230 B/op 102 allocs/op BenchmarkStructComplexParallel-4 200000 6686 ns/op 3232 B/op 102 allocs/op ``` How to Contribute ------ There will always be a development branch for each version i.e. `v1-development`. In order to contribute, please make your pull requests against those branches. If the changes being proposed or requested are breaking changes, please create an issue, for discussion or create a pull request against the highest development branch for example this package has a v1 and v1-development branch however, there will also be a v2-development brach even though v2 doesn't exist yet. I strongly encourage everyone whom creates a custom validation function to contribute them and help make this package even better. License ------ Distributed under MIT License, please see license file in code for more details.