Re-add metadata passthrough on Get operations

service/datastore/checkfilter.go

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package datastore
 
 import (
         "fmt"
 
         "github.com/luci/gae/service/info"
@@ skipping 18 matching lines @@
 func (tcf *checkFilter) Run(q Query, cb RawRunCB) error {
         if q == nil {
                 return fmt.Errorf("datastore: Run query is nil")
         }
         if cb == nil {
                 return fmt.Errorf("datastore: Run callback is nil")
         }
         return tcf.RawInterface.Run(q, cb)
 }
 
-func (tcf *checkFilter) GetMulti(keys []Key, cb GetMultiCB) error {
+func (tcf *checkFilter) GetMulti(keys []Key, meta MultiMetaGetter, cb GetMultiCB) error {
         if len(keys) == 0 {
                 return nil
         }
         if cb == nil {
                 return fmt.Errorf("datastore: GetMulti callback is nil")
         }
         lme := errors.LazyMultiError{Size: len(keys)}
         for i, k := range keys {
                 if KeyIncomplete(k) || !KeyValid(k, true, tcf.aid, tcf.ns) {
                         lme.Assign(i, ErrInvalidKey)
                 }
         }
         if me := lme.Get(); me != nil {
                 for _, err := range me.(errors.MultiError) {
                         cb(nil, err)
                 }
                 return nil
         }
-        return tcf.RawInterface.GetMulti(keys, cb)
+        return tcf.RawInterface.GetMulti(keys, meta, cb)
 }
 
 func (tcf *checkFilter) PutMulti(keys []Key, vals []PropertyMap, cb PutMultiCB) error {
         if len(keys) != len(vals) {
-                return fmt.Errorf("datastore: GetMulti with mismatched keys/vals lengths (%d/%d)", len(keys), len(vals))
+                return fmt.Errorf("datastore: PutMulti with mismatched keys/vals lengths (%d/%d)", len(keys), len(vals))
         }
         if len(keys) == 0 {
                 return nil
         }
         if cb == nil {
                 return fmt.Errorf("datastore: PutMulti callback is nil")
         }
         lme := errors.LazyMultiError{Size: len(keys)}
         for i, k := range keys {
                 if KeyIncomplete(k) {
@@ skipping 38 matching lines @@
                 }
                 return nil
         }
         return tcf.RawInterface.DeleteMulti(keys, cb)
 }
 
 func applyCheckFilter(c context.Context, i RawInterface) RawInterface {
         inf := info.Get(c)
         return &checkFilter{i, inf.AppID(), inf.GetNamespace()}
 }