dounai9294 2015-03-31 14:37
浏览 29
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是否可以在Go中将结构作为参数传递?

I'm trying to pass an array of key, values to another function in Go. Very new to Go so am struggling to figure it out.

package main

import(
    "net/http"
    "fmt"
    "io/ioutil"
    "net/url"
)

type Params struct {
    items []KeyValue
}

type KeyValue struct {
    key string
    value string
}

func main() {
     data := []Params{
          KeyValue{ key: "title", value: "Thingy" },
          KeyValue{ key: "body", value: "Testing 123" }}

     response, error := makePost("test-api.dev", &data)
}

func makePost(urlString string, values []Params) (string, error) {

     v := url.Values{}

    for _, val := range values {
        v.Add(val.key, val.value)
    }

    response, err := http.PostForm(urlString, v)

    defer response.Body.Close()

    contents, err :=  ioutil.ReadAll(response.Body)

    if err != nil {
        fmt.Printf("%s", err)
    }

    return string(contents), err
}

I get errors:

val.key undefined (type Params has no field or method key)
val.value undefined (type Params has no field or method key)

When I compile however.

Go playground link http://play.golang.org/p/CQw03wZmAV

Thanks in advance!

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3条回答 默认 最新

  • doutuan6158 2015-03-31 15:23
    关注

    As others have mentioned, you have an []Params but you are trying to initialize with KeyValues.

    data := []Params{
          KeyValue{ key: "title", value: "Thingy" },
          KeyValue{ key: "body", value: "Testing 123" }}
    

    Instead, try:

    data := &Params{items: []KeyValue{
        {key: "title", value: "Thingy"},
        {key: "body", value: "Testing 123"},
    }}
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
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