Marshalling XML in GOlang: field is empty (APPEND doesn't work?)

Question

i\'m learning to create XML in Go. Here\'s my code:

type Request struct {
    XMLName       xml.Name        `xml:\"request\"`
    Action        string                


        

Answer 1

The members that you want to marshal have to be exported (capitalized). Try:

type point struct {
    Geo    string `xml:"point"`
    Radius int    `xml:"radius,attr"`
}

From the encoding/xml doc:

The XML element for a struct contains marshalled elements for each of the exported fields of the struct.

[..]

Because Unmarshal uses the reflect package, it can only assign to exported (upper case) fields.

Answer 2

Several things are wrong in your code. When working with encoding packages in Go, all the fields you want to marshal/unmarshal have to be exported. Note that the structs themselves do not have to be exported.

So, first step is to change the point struct to export the fields:

type point struct {
    Geo    string `xml:"point"`
    Radius int    `xml:"radius,attr"`
}

Now, if you want to display the Geo field inside a point, you have to add ,cdata to the xml tag. Finally, there is no need to add an omitempty keyword to a slice.

type Request struct {
    XMLName xml.Name `xml:"request"`
    Action  string   `xml:"action,attr"`
    Point   []point  `xml:"point"`
}

type point struct {
    Geo    string `xml:",chardata"`
    Radius int    `xml:"radius,attr"`
}

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