Proto type int64 get the error format in http swagger post body

[zengzhengrong]

proto file

message Userprofile{
  int64 user_id = 1;
  ...
 }

pb.go

type Userprofile struct {
	UserId int64 `protobuf:"varint,1,opt,name=user_id,json=userId,proto3" json:"user_id,omitempty"`
  ....
}

It’s very strange ~, but I try to use int32 , it's work fine

[utrack]

Hi, it is not an error and in fact a Protobuf JSON mapping spec: https://developers.google.com/protocol-buffers/docs/proto3#json_mapping

It is done like that because JS integers are precise up to 2^52 instead of int64's 2^63: grpc-ecosystem/grpc-gateway#219 (comment)

So if you were sending JSON of {"foo":(number bigger than 2^52)} many JSON parsers won't parse that number.

[bullgare]

Yes, we've run into this limitation a couple of years ago also.

[zengzhengrong]

Thank ~！ Got it