英文:
proto UnmarshalText fails on unknown field
问题
在Golang中，当文本包含未知字段时，UnmarshalText会失败。
例如，以下代码可以正常工作：
rawstr := "knownfield1:\"abc\" knownfield2:\"def\""
var msg pb.MyProtoMessage
err := proto.UnmarshalText(rawstr, &msg)
// 没有错误
但是以下代码会失败：
rawstr := "knownfield1:\"abc\" knownfield2:\"def\" UNKNOWNfield:\"xyz\""
var msg pb.MyProtoMessage
err := proto.UnmarshalText(rawstr, &msg)
// 错误
有没有人知道如何让UnmarshalText忽略未知字段？
英文:
In golang UnmarshalText fails when the text contains unknown field.
For example, this works:
rawstr := "knownfield1:\"abc\" knownfield2:\"def\""
var msg pb.MyProtoMessage
err := proto.UnmarshalText(rawstr, &msg)
// no error
But this doesn't:
rawstr := "knownfield1:\"abc\" knownfield2:\"def\" UNKNOWNfield:\"xyz\""
var msg pb.MyProtoMessage
err := proto.UnmarshalText(rawstr, &msg)
// error
Does anyone know how to get UnmarshalText to ignore unknown fields?
答案1
得分: 3
你应该在UnmarshalOptions上设置DiscardUnknown，以忽略未知字段：
rawstr := "knownfield1:\"abc\" knownfield2:\"def\" UNKNOWNfield:\"xyz\""
var msg pb.MyProtoMessage
unmarshaler := prototext.UnmarshalOptions{DiscardUnknown: true}
err := unmarshaler.UnmarshalText(rawstr, &msg)
英文:
You should set DiscardUnknown on UnmarshalOptions to ignore unknown fields:
rawstr := "knownfield1:\"abc\" knownfield2:\"def\" UNKNOWNfield:\"xyz\""
var msg pb.MyProtoMessage
unmarshaler := prototext.UnmarshalOptions{DiscardUnknown: true}
err := unmarshaler.UnmarshalText(rawstr, &msg)
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