json - 复杂的 JSON 编码到 GoLang 对象

Question

我需要将复杂的 JSON 对象编码为 GO 结构。

所以我有来源:

"NetworkSettings": {
        "Bridge": "",
        "SandboxID": "e9736755bc41db307019fde3be0feed51086e6d3e23b0213c59bb5e43f7af214",
        "HairpinMode": false,
        "SecondaryIPAddresses": null,
        "SecondaryIPv6Addresses": null,
        "EndpointID": "2ee283787f45894c3383229d29ada1ccbb7f34b1c1e143e417e7ba75b7f5ebce",
        "Gateway": "172.17.0.1",
        "IPAddress": "172.17.0.2",
        "IPPrefixLen": 16,
        "IPv6Gateway": "",
        "MacAddress": "02:42:ac:11:00:02",
        "Networks": {
            "bridge": {
                "IPAMConfig": null,
                "Links": null,
                "Aliases": null,
                "NetworkID": "1c4788fac19973ddc73975613a2aef5a4cc2be446af458c06fa5fa162e8126ff",
                "EndpointID": "2ee283787f45894c3383229d29ada1ccbb7f34b1c1e143e417e7ba75b7f5ebce",
                "Gateway": "172.17.0.1",
                "IPAddress": "172.17.0.2",
                "IPPrefixLen": 16,
                "IPv6Gateway": "",
                "GlobalIPv6Address": "",
                "GlobalIPv6PrefixLen": 0,
                "MacAddress": "02:42:ac:11:00:02"
            }
        }

我需要将它映射到这样的对象中:

NetworkSettings struct {
    IpAddress string
    SandboxID string
    Gateway string
    Ports     map[string][]Binding
    Networks map[string]map[string]string
}

但是由于 Networks map[string]map[string]string 我收到错误

json: cannot unmarshal object into Go value of type string
error restoring containers: json: cannot unmarshal object into Go value of type string

但是这就是我需要有复杂 map 结构的 map 。

知道怎么做吗？

Answer 1

发生该错误是因为 JSON 中的某些值不是字符串，而是整数(例如 IPPrefixLen)，因此无法分配给字符串变量。

有两种方法可以解决这个问题。您可以使用 interface{} 类型，这样您的类型定义将变为:

NetworkSettings struct {
    IpAddress string
    SandboxID string
    Gateway   string
    Ports     map[string][]Binding
    Networks  map[string]map[string]interface{}
}

更好的解决方案可能是为网络 block 定义一个类型:

type Network struct {
    NetworkID   string 
    EndpointID  string
    Gateway     string
    IPAddress   string
    IPPrefixLen int
    //etc...
}
type NetworkSettings struct {
    IpAddress string
    SandboxID string
    Gateway   string
    Ports     map[string][]Binding
    Networks  map[string]Network
}