How to return an array in Protobuf service rpc

Question

I have the following schema in my .proto file:

service MyService {     rpc GetItem (ItemQuery) returns (Item) {     } }  message ItemQuery {     int id = 1; } message Item {     int id = 1;     string name = 2; } 

Now I want to add another rpc method to return multiple Items. Something like this:

rpc GetItems (ItemsQuery) returns (repeated Item) { } 

Is there a better way to do it than define an Items message?

Answer 1

Option 1 - Use stream:

rpc GetItems (ItemsQuery) returns (stream Item) { } 

Option 2 - Set a response message which will use a repeated object:

service MyService {     rpc GetItem (ItemQuery) returns (ItemResponse) {     } }  message ItemQuery {     int id = 1; } message ItemResponse {     repeated Item items = 1; } message Item {     int id = 1;     string name = 2; }