Structor

I am a struct initializer, init struct from others

Features

Copy from struct to struct with same name
Calc field from JavaScript expression
Calc field from multi Object

Demo Usage

source

package main

import (
	"encoding/json"
	"fmt"

	"github.com/pkgng/structor"
)

type Human struct {
	Name  string
	Role  string
	Age   *int32
	Tel   string
	Notes []string
	Flags string
}

type AddressT struct {
	Address string
	Adcode  string
	Gps     string
}

type WifeT struct {
	structor.BaseStructor `structor:"CopyByName,Wife"`
	Name                  string
	NickName              string `structor:"Wife.Name.toLocaleLowerCase()"`
	Age                   int
	Age3                  int32 `structor:"self.Age + 3"`
}

type Farmer struct {
	structor.BaseStructor `structor:"CopyByName,Human,address"`
	Name                  string
	Age                   int64
	Nickname              string   `structor:"self.Name.toLocaleLowerCase()"`
	DoubleAge             int32    `structor:"Human.Age * 2"`
	SuperRole             string   `structor:"'Farmer-' + Human.Role"`
	Notes                 []string `structor:"Human.Notes.reverse()"`
	Flags                 []string `structor:"Human.Flags.split(',')"`
	Contact               struct {
		Tel     string `structor:"Human.Tel"`
		Address string `structor:"address.Address"`
		Adcode  string `structor:"address.Adcode"`
	}
	Wife WifeT
}

func main() {
	var age int32 = 23
	var age2 int32 = 22
	man := Human{Name: "LiLei", Age: &age, Tel: "18611009988", Role: "Farmer", Notes: []string{"hello", "world"}, Flags: "a,b,c"}
	address := AddressT{Adcode: "110108", Address: "北京海淀区五道口优盛大厦D座", Gps: "116.328115,40.054629"}
	wife := Human{Name: "HanMeiMei", Age: &age2, Role: "Wife", Notes: []string{"hello", "world"}, Flags: "e,f,g"}

	farmer := Farmer{}
	structor.New().Set("Human", &man).Set("address", address).Set("Wife", &wife).Construct(&farmer)

	// fmt.Printf("%#v\n", farmer)

	b, err := json.Marshal(farmer)
	if err != nil {
		fmt.Println("JSON ERR:", err)
	}
	fmt.Println(string(b))
}

output

	{
		"Name":"LiLei",
		"Age":23,
		"Nickname":"lilei",
		"DoubleAge":46,
		"SuperRole":"Farmer-Farmer",
		"Notes":["world","hello"],
		"Flags":["a","b","c"],
		"Contact":{
			"Tel":"18611009988",
			"Address":"北京海淀区五道口优盛大厦D座",
			"Adcode":"110108"
		},
		"Wife":{
			"Name":"HanMeiMei",
			"NickName":"hanmeimei",
			"Age":22,
			"Age3":25
		}
	}

基础介绍

本工具用于对象的构建，可以指定相同名字字段的copy，

也可以使用其他对象的成员变量计算生成，tag内文本语法为javascrip表达式。

基类 structor.BaseStructor

基类的 structor Tag 为逗号分割的字符串，用于指定构建对象需要用到的对象名字；

成员字段计算Tag中可以直接使用这些对象的名字来引用对象；

内置功能字符串为：

内置功能字符串	功能描述
CopyByName	copy 相同名字的字段到目标对象上

demo 中 Farmer 的基类Tag 含义为：

从 Human 和 address 两个对象来构建自己，并将有相同名字的字段 copy过来。

成员字段计算Tag

tag内文本语法为javascrip表达式，可以使用的变量为基类中指定的对象；

另外 self变量指向本对象，可以使用self来引用CopyByName的字段，因为Copy逻辑在计算逻辑之前执行。

Structor 对象 Set(name string, value interface{})

添加构建目标对象的资源, 需要指定名字，名字要与BaseStructor Tag 中的名字相同

Structor Construct(target interface{})

构建目标方法，调用后立即执行，输入参数为需要构建的对象的地址

Contributing

You can help to make the project better, check out http://gorm.io/contribute.html for things you can do.

Author

pkgng

http://github.com/pkgng

License

Released under the MIT License.