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基本介绍

gstructs 组件用于方便获取结构体的相关信息。

这是一个偏底层组件,一般业务上很少会用到,在框架、基础库、中间件编写中用到。

使用方式:

import "github.com/gogf/gf/v2/os/gstructs"

接口文档:

https://pkg.go.dev/github.com/gogf/gf/v2/os/gstructs

常用方法

Fields

  • 说明:Fields 将输入参数 inPointer 属性的字段以 Field 切片的形式返回。

  • 格式:

Fields(in FieldsInput) ([]Field, error)
  • 示例:
func main() {
type User struct {
Id int
Name string `params:"name"`
Pass string `my-tag1:"pass1" my-tag2:"pass2" params:"pass"`
}
var user *User
fields, _ := gstructs.Fields(gstructs.FieldsInput{
Pointer: user,
RecursiveOption: 0,
})

g.Dump(fields)
}

// Output:
[
{
Value: "<int Value>",
Field: {
Name: "Id",
PkgPath: "",
Type: "int",
Tag: "",
Offset: 0,
Index: [
0,
],
Anonymous: false,
},
TagValue: "",
},
{
Value: {},
Field: {
Name: "Name",
PkgPath: "",
Type: "string",
Tag: "params:\"name\"",
Offset: 8,
Index: [
1,
],
Anonymous: false,
},
TagValue: "",
},
{
Value: {},
Field: {
Name: "Pass",
PkgPath: "",
Type: "string",
Tag: "my-tag1:\"pass1\" my-tag2:\"pass2\" params:\"pass\"",
Offset: 24,
Index: [
2,
],
Anonymous: false,
},
TagValue: "",
},
]

TagMapName

  • 说明:TagMapName 从参数 pointer 中检索 tag,并以 map[string]string 的形式返回。

  • 注意:

    • 参数 pointer 的类型应该是 struct/*struct
    • 只会返回可导出的字段(首字母大写的字段)。
  • 格式:

TagMapName(pointer interface{}, priority []string) (map[string]string, error)
  • 示例:
func main() {
type User struct {
Id int
Name string `params:"name"`
Pass string `my-tag1:"pass1" my-tag2:"pass2" params:"pass"`
}
var user User
m, _ := gstructs.TagMapName(user, []string{"params"})

g.Dump(m)
}

// Output:
{
"name": "Name",
"pass": "Pass",
}