Use Array of struct in proto-CodePudding

I am not able to call a gRPC function due to type mismatch

my proto file :

message Analytics {
    fields ...
}


message AnalyticsSet {
    repeated Analytics analytics = 1;
}

service StatService {
    rpc MyMethod(AnalyticsSet) returns (<something>) {}
}

Now, I need to call "MyMethod"

My current code :

type Analytics struct {
    same fields as in proto : Analytics
}

analytics := make([]Analytics, 4)

// .. some modifications in analytics ...

_, err := c.MyMethod(context.Background(), analytics)
if err != nil {
    log.Fatalf("error: %s", err)
}

in Proto file "AnalyticsSet" is the array of "Analytics" and in Go code "analytics" is an array of type "Analytics" but this is not enough to call "MyMethod", and I am facing type mismatch..

How should I modify the go code ?

CodePudding user response：

You must use the Analytics struct generated from the proto file -- you cannot use your own type.

You can generate the required Go code using protoc with your .proto file. Here is an example with gRPC generation options set as well: .

$ protoc --go_out=. --go-grpc_out=. --go_opt=paths=source_relative --go-grpc_opt=paths=source_relative analytics.proto

Your proto file should have the go_package option set to describe the Go import path for that your generated proto code belongs to. You will also need to install the go / go-grpc generator utilities required by protoc:

$ go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
$ go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest

More details can be found in: