CODEWITHSUNDEEP
xmlgounmarshalling
Rob
Rob

Reputation: 11788

Unmarshalling XML child array into direct Go struct array

I have an XML object like this:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<directory count="2">
<entries>
    <entry name="Alice"/>
    <entry name="Bob"/>
</entries>
</directory>

Now I want to parse this into a Go struct that looks like this:

type Entry struct {
    XMLName xml.Name `xml:"entry"`
    Name    string   `xml:"name,attr"`
}

type Directory struct {
    XMLName xml.Name `xml:"directory"`
    Count   string   `xml:"count,attr"`
    Entries []Entry  `xml:"entries"`
}

As you can see, I'd like Entries to be a direct child of Directory. This does not work, Directory.Entries is always empty.

It does however work when I add some kind of proxy object like this (got this from an XML->Go struct converter found here):

type Directory struct {
    XMLName xml.Name `xml:"directory"`
    Text    string   `xml:",chardata"`
    Count   string   `xml:"count,attr"`
    Entries struct {
        Text  string `xml:",chardata"`
        Entry []struct {
            Text string `xml:",chardata"`
            Name string `xml:"name,attr"`
        } `xml:"entry"`
    } `xml:"entries"`
}

In this version, the array gets filled and I can access a given entry at index i via Directory.Entries.Entry[i].

How can I omit the unneccessary object here and access the entries directly via Directory.Entries[i]? Is it possible without building a custom (un)marshaller?

Upvotes: 0

Views: 118

Answers (1)

JayJay
JayJay

Reputation: 814

You're missing the parent>child>plant tag > from the xml definition on the entries collection:

Entries []Entry  `xml:"entries>entry"`

Go Play: https://go.dev/play/p/4SZT8-S8BFF

Upvotes: 2

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