Copy nested repeated messages

[ksamdev]

Hi,

I've got nested messages like:

message A

{

   required double value = 1;

}

message B

{

  required A a = 1;

}

message C

{

  repeated B entries = 1;

}

The C object is saved in file and may have any number of B entries. However, now I'd like to save a copy of C in a different file with B's that match some criteria, e.g.

...

C original;

// Read object from file

C *copy = new C();

typedef ::google::protobuf::RepeatedPtrField<B> Bs;

for(Bs::const_iterator b = c->entries().begin();

c->entries().end() != b;

++b)

{

if (b->a().value() < 5)

continue;

// Copy B entry and add it to the Filtered C

B *entry = copy->add_entries();

*entry = *b;
}

// save copy

Sometimes it happens that I get the error message upon reading filtered C:

libprotobuf ERROR google/protobuf/message_lite.cc:123] Can't parse message of type "C" because it is missing required fields: entries[0].A

It seems that deep copy of nested repeated messages failed for some reason. Any ideas how to fix this?

[ksamdev]

Oh, I forgot to add some info on the Protobuf. I use v2.3.0 with C++.

[Pherl Liu]

This shouldn't happen.. That means your unfiltered C also contains uninitialized messages.. Did you add new required fields in your .proto file (or change optional to required)?

--
You received this message because you are subscribed to the Google Groups "Protocol Buffers" group.
To view this discussion on the web visit https://groups.google.com/d/msg/protobuf/-/WmZZUDM2ZDR0ZmNK.
To post to this group, send email to prot...@googlegroups.com.
To unsubscribe from this group, send email to protobuf+u...@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/protobuf?hl=en.