英文:
Prevent Marshal From Escaping Quotes on String Field of Struct
问题
我遇到了解析以下结构的问题,其中JsonData是存储在数据库中的JSON字符串。
type User struct {
Id uint64 `json:"user_id"`
JsonData string `json:"data"`
}
user := &User{
Id: 444,
JsonData: `{"field_a": 73, "field_b": "a string"}`,
}
如果我对其进行json.Marshal,它会转义引号,但这将给我以下JSON:
{
"user_id" : 444,
"data": "{\"field_a\": 73, \"field_b\": \"a string\"}"
}
有没有办法告诉编组器避免转义JsonData字符串并将其放在引号中,使其看起来像这样?
{
"user_id" : 444,
"data": {"field_a": 73, "field_b": "a string"}
}
我希望不要通过太多的步骤来实现,比如创建一个全新的类似User的对象和/或对字符串进行解组/重新组合等。
英文:
I am having an issue parsing the following structure, where JsonData is a string of JSON stored in a database.
type User struct {
Id uint64 `json:"user_id"`
JsonData string `json:"data"`
}
user := &User {
Id: 444,
JsonData: `{"field_a": 73, "field_b": "a string"}`,
}
If I json.Marshal this, it will escape the quotes but that will give me the JSON:
{
"user_id" : 444,
"data": "{\"field_a\": 73, \"field_b\": \"a string\"}"
}
Is there a way to tell the marshaller to avoid escaping the JsonData string and putting it in quotes, so it looks like this?
{
"user_id" : 444,
"data": {"field_a": 73, "field_b": "a string"}
}
I would prefer to not jump through too many hoops like creating an entirely new User-like object and/or unmarshaling/remarshaling the string etc.
答案1
得分: 18
似乎你正在寻找的是RawMessage:
RawMessage 是一个原始编码的 JSON 对象。它实现了 Marshaler 和 Unmarshaler 接口,可以用于延迟 JSON 解码或预先计算 JSON 编码。
Playground: http://play.golang.org/p/MFNQlISy-o.
英文:
Seems like RawMessage is what you are looking for:
>RawMessage is a raw encoded JSON object. It implements Marshaler and Unmarshaler and can be used to delay JSON decoding or precompute a JSON encoding.
Playground: http://play.golang.org/p/MFNQlISy-o.
答案2
得分: 0
你还可以在字段上使用'string'标签,这将告诉编组器该字段已经是JSON格式的:
type User struct {
Id uint64 `json:"user_id"`
JsonData string `json:"data,string"`
}
英文:
you can also use the 'string' tag on the field, which will tell the marshaller that the field is already in JSON:
type User struct {
Id uint64 `json:"user_id"`
JsonData string `json:"data,string"`
}
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