英文:
Multiple tags on the same Go struct member
问题
我觉得这应该是一个小问题，但是我尝试了我能想到的每种模式，但都没有成功。我有一个需要被encoding/json和github.com/zeebo/bencode包都能编码的结构。它包含一个通道，这个通道不能被任何一个包编码。因此，它需要带有标签"-"，以便跳过该字段。
type Index struct {
Data data
Queue chan string `json:"-"`
}
这在json包编码时是有效的，但在bencode包中失败了。
type Index struct {
Data data
Queue chan string `bencode:"-"`
}
当然，这个代码块有相应的问题。我尝试过像json:"-",bencode:"-"、*:"-"、"-"、-这样的标签语法。有解决方案吗？
谢谢大家。
英文:
I feel like this should be a minor problem, but I've tried every pattern that I can think of, and I haven't had any luck. I have a structure that needs to be encodable by both the encoding/json and github.com/zeebo/bencode packages. It happens to include a channel, which cannot be encoded by either package. Thus, it needs to carry the tag "-", so that that field is skipped.
type Index struct {
Data data
Queue chan string `json:"-"`
}
This is valid when encoded by the json package, but fails with the bencode package.
type Index struct {
Data data
Queue chan string `bencode:"-"`
}
This block, of course, has the complimentary problem. I have tried tag syntaxes like json:"-",bencode:"-", *:"-", "-", -. Is there a solution?
Thank you all.
答案1
得分: 25
空格似乎是用于编码提示时结构标签之间的分隔符。
示例：
type TaggedStructExample struct {
...
J int `datastore:",noindex" json:"j"`
}
来源：https://developers.google.com/appengine/docs/go/datastore/reference#Properties
在您的情况下，请尝试：
type Index struct {
Data data
Queue chan string `bencode:"-" json:"-"`
}
英文:
Spaces appear to be the delimiter between struct tags when used for encoding hints.
Example:
type TaggedStructExample struct {
...
J int `datastore:",noindex" json:"j"`
}
From: https://developers.google.com/appengine/docs/go/datastore/reference#Properties
In your case, try:
type Index struct {
Data data
Queue chan string `bencode:"-" json:"-"`
}
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