dqg17080
dqg17080
采纳率0%
2016-04-05 11:27

Go模板中的嵌套范围

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I have structure like these

type Users struct{  
    Name           string           `json:"Name,omitempty"`  
    Gender         string           `json:"Gender,omitempty"`  
    Communication  []*Communication `json:"Communication,omitempty"`  
}  

type Communication struct {  
    Type  string `json:"Type,omitempty"`  
    Value string `json:"Value,omitempty"`  
}  

every user will have two communication structure like

[
    {
        "Type": "MOBILE",
        "Value": "12121212"
    },
    {
        "Type": "Email",
        "Value": "Some@email.com"
    }
]  

In my template i want to display them in a table. iam getting the User structure values, but could not get the communication structure values

HTML Template file (partial code):

<tbody>  
{{range $key, $val := .Users}}   
<td style="text-align: center;">{{$val.Name}}</td>  
<td style="text-align: center;">{{$val.Gender}}</td>  
///////How to display communication values here??////////////  
{{end}}  
</tbody>
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1条回答

  • duannai5879 duannai5879 5年前

    You can access the Communication field just like other fields.

    {{$val.Communication}}

    Since you want each these entries in separate <td>s its easier if you could put them in a map instead of a slice. You could use a function like below for that.

    sliceToMap := func(s []*Communication) map[string]string {
        comms := map[string]string{}
    
        for _, c := range s {
            comms[c.Type] = c.Value
        }
    
        return comms
    }
    

    You can register this as a custom function to be used in the template,

    t := template.Must(template.New("").Funcs(template.FuncMap{
        "SliceToMap": sliceToMap,
    }).Parse(src))
    

    Then your template could be,

    <tbody>  
    {{range $key, $val := .Users}}   
    <td style="text-align: center;">{{$val.Name}}</td>  
    <td style="text-align: center;">{{$val.Gender}}</td> 
    
    {{$comms := SliceToMap $val.Communication}}
    
    <td style="text-align: center;">{{index $comms "mobile"}}</td>
    <td style="text-align: center;">{{index $comms "email"}}</td>
    
    {{end}}  
    </tbody>
    

    See these in Go Playground

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