It works fine when I run it.
> *go test -v .*
=== RUN TestABCMessage
opt1:123 opt2:"baz"
--- PASS: TestABCMessage (0.00s)
PASS
ok test 0.007s
However, your test file was incomplete. Maybe you have imported the wrong
stuff? Double-check that you are linking against the latest version of the
github.com/golang/protobuf packages.
I had to add imports, and I also changed the handling of the output since I
don't know what "spew" is:
package cmd
import (
"fmt"
"testing"
"github.com/golang/protobuf/descriptor"
"github.com/golang/protobuf/proto"
)
func TestABCMessage(t *testing.T) {
var msg Bar
_, md := descriptor.ForMessage(&msg)
opts := md.Field[0].GetOptions()
foo, err := proto.GetExtension(opts, E_FooOptions)
if err != nil {
t.Errorf("failed: %v", err)
} else {
fmt.Println(foo)
}
}
----
*Josh Humphries*
[email protected]
On Wed, Oct 25, 2017 at 10:54 PM, <[email protected]> wrote:
> /tmp/TestABCMessage_in_version_abc_test_gogo -test.v -test.run
> ^TestABCMessage$
> (*errors.errorString)(0xc420214af0)(proto: not an extendable proto)
> (interface {}) <nil>
>
> On Wednesday, October 25, 2017 at 8:38:51 PM UTC+8, [email protected]
> wrote:
>>
>> the example in https://developers.google.com/protocol-buffers/docs/proto
>> #customoptions below
>>
>> message FooOptions {
>> optional int32 opt1 = 1;
>> optional string opt2 = 2;
>> }
>>
>> extend google.protobuf.FieldOptions {
>> optional FooOptions foo_options = 1234;
>> }
>>
>> // usage:
>> message Bar {
>> optional int32 a = 1 [(foo_options).opt1 = 123, (foo_options).opt2 =
>> "baz"];
>> // alternative aggregate syntax (uses TextFormat):
>> optional int32 b = 2 [(foo_options) = { opt1: 456 opt2: "xaa" }];
>> }
>>
>> assume I have a message Bar here:
>>
>> var msg Bar
>> _, md := ForMessage(&msg)
>> md.Field[0].GetOptions().String() only a string, How do i parse that ??
>>
>> How to I get the exact value of Bar.b.opt1 which is 123 (default value)
>>
>> What I want is like this
>>
>> md.Field[0].GetOptions().GetOpt1() // 123
>> md.Field[0].GetOptions().GetOpt2() // baz
>> md.Field[1].GetOptions().GetOpt1() // 456
>> md.Field[1].GetOptions().GetOpt2() // xaa
>>
>> Can we achieve that ?
>>
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