英文:
Unmarshaling top-level json object in golang
问题
我正在尝试在Golang中解析一个Node的package.json文件，并且我有以下的结构体：
type packageJson struct {
scripts map[string]interface{} `json:"scripts"`
dependencies map[string]interface{} `json:"dependencies"`
devDependencies map[string]interface{} `json:"devDependencies"`
}
当我解析package文件时，结构体没有被填充（虽然没有报错）。我怀疑这是因为content本身是一个对象（例如：{ "scripts":"...", ... }），而Unmarshal方法希望将其转换为map[string]interface{}。有没有什么建议可以解决这个问题？我尝试创建一个包装结构体并使用jpath，但没有成功。谢谢！
注意：我可以这样做
var content map[string]interface{}
...
if val, ok := content["scripts"]; !ok { ... }
但如果可能的话，我想避免这样做。
英文:
I'm trying to parse a node package.json file in golang and I've got the following struct:
type packageJson struct {
scripts map[string]interface{} `json:"scripts"`
dependencies map[string]interface{} `json:"dependencies"`
devDependencies map[string]interface{} `json:"devDependencies"`
}
...
var content packageJson
if err := json.Unmarshal(b, &content); err != nil {
return err
}
When I parse the package file however the struct is not being populated (not getting an error though). I suspect it is because the content is an object itself (i.e.: { "scripts":"...", ... }) and the Unmarshal method wants to convert it into a map[string]interface{}. Any suggestions how to get around this "issue"? I tried creating a wrapper struct and using jpath but to no avail. Thanks!
Note: I could do this
var content map[string]interface{}
...
if val, ok := content["scripts"]; !ok { ... }
but I'd like to avoid it if possible.
答案1
得分: 3
你应该将结构体字段设为公共的。
英文:
You should make struct fields public.
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