具有动态架构的Golang和Yaml

本文介绍了具有动态架构的Golang和Yaml的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个具有动态架构的YAML结构，例如我可以使用以下yaml:

I have a YAML structure with dynamic schema e.g. I can have the following yaml:

array: - name: myvar val: 1 - name: mymap val: [ 1, 2]

Goyaml将yaml映射到Go结构，该结构应声明确定的类型.在这里，val是一个数字，或者是一个数组，甚至是一个映射.

Goyaml maps yaml to Go struct, which should declare definite type. Here, val is either a signle number, or an array or even a map.

哪种方法最适合这种情况?

Which is the best solution for this situation?

推荐答案

我决定添加一个显示类型断言的答案，而不是reflect包.您可以决定最适合您的应用程序.我个人更喜欢内置函数，而不是reflect软件包的复杂性.

I decided to add an answer showing a type assertion instead of the reflect package. You can decide which is best for your application. I personally prefer the builtin functions over the complexity of the reflect package.

var data = ` array: - name: myvar val: 1 - name: mymap val: [1, 2] ` type Data struct { Array []struct { Name string Val interface{} } } func main() { d := Data{} err := yaml.Unmarshal([]byte(data), &d) if err != nil { log.Fatal(err) } for i := range d.Array { switch val := d.Array[i].(type) { case int: fmt.Println(val) // is integer case []int: fmt.Println(val) // is []int case []string: fmt.Println(val) // is []string // .... you get the idea default: log.Fatalf("Type unaccounted for: %+v\n", d.Array[i]) } } }