App Engine go context.Context没有名称空间

Question

After obtain a context from ctx, ctxErr := appengine.Namespace(ctx, "MyContext") I would expect ctx namespace to be populated with MyContext

Code

import (
...
"golang.org/x/net/context"
"google.golang.org/appengine"
)


ctx := appengine.NewContext(r)
ctx, ctxErr := appengine.Namespace(ctx, "MyContext")
if ctxErr != nil {
  log.Errorf(ctx, "Failed to obtain custom namespace context, error:%s", ctxErr.Error())
  //use default if all else fails
  ctx = appengine.NewContext(r)
}

However this is not the case, thus causing all namespace aware API to use default namespace.

Dump of ctx produces the following (see yellow bordered output)

Example App

Populate projectID := "" with your project id, ensure you have performed authentication on your development environment and run go run /example/app/main.go

Example App

Answer 1

Mixing of google api go libs, was causing the problem.

Long Answer

Short Answer

Google Cloud API libs come in two different flavors, issues was caused by mixing of lib features from libs below.

google-cloud-go Recommanded

google-api-go-client