GetFeeds must always discard actions with dangling repo_id (#19598) (#19629)

Co-authored-by: Loïc Dachary <loic@dachary.org>
(cherry picked from commit b536b65189)

Conflicts:
        models/action_test.go
	  The GetFeeds function does not have a Context argument in 1.16.
	models/action.go
	  The SQL statement is essentially the same in 1.16 but
	  structured differently. The Join() was copied and the
   	  created_unix field prefixed with `action`.
	models/action_list.go
	  in 1.16 the loadRepoOwner method did not exist and
	  it was done in the RetrieveFeeds method of web/feed/profile.go.
          The safeguard to skip when act.Repo == nil was moved there.

models/action.go

@@ -337,7 +337,7 @@ func GetFeeds(opts GetFeedsOptions) ([]*Action, error) {
 
 	actions := make([]*Action, 0, setting.UI.FeedPagingNum)
 
-	if err := db.GetEngine(db.DefaultContext).Limit(setting.UI.FeedPagingNum).Desc("created_unix").Where(cond).Find(&actions); err != nil {
+	if err := db.GetEngine(db.DefaultContext).Limit(setting.UI.FeedPagingNum).Desc("`action`.created_unix").Where(cond).Join("INNER", "repository", "`repository`.id = `action`.repo_id").Find(&actions); err != nil {
 		return nil, fmt.Errorf("Find: %v", err)
 	}
 
@@ -401,7 +401,7 @@ func activityQueryCondition(opts GetFeedsOptions) (builder.Cond, error) {
 		cond = cond.And(builder.Eq{"act_user_id": opts.RequestedUser.ID})
 	}
 	if !opts.IncludePrivate {
-		cond = cond.And(builder.Eq{"is_private": false})
+		cond = cond.And(builder.Eq{"`action`.is_private": false})
 	}
 	if !opts.IncludeDeleted {
 		cond = cond.And(builder.Eq{"is_deleted": false})
@@ -414,8 +414,8 @@ func activityQueryCondition(opts GetFeedsOptions) (builder.Cond, error) {
 		} else {
 			dateHigh := dateLow.Add(86399000000000) // 23h59m59s
 
-			cond = cond.And(builder.Gte{"created_unix": dateLow.Unix()})
-			cond = cond.And(builder.Lte{"created_unix": dateHigh.Unix()})
+			cond = cond.And(builder.Gte{"`action`.created_unix": dateLow.Unix()})
+			cond = cond.And(builder.Lte{"`action`.created_unix": dateHigh.Unix()})
 		}
 	}
 

models/action_test.go

@@ -129,3 +129,20 @@ func TestNotifyWatchers(t *testing.T) {
 		OpType:    action.OpType,
 	})
 }
+
+func TestGetFeedsCorrupted(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 1}).(*user_model.User)
+	unittest.AssertExistsAndLoadBean(t, &Action{
+		ID:     8,
+		RepoID: 1700,
+	})
+
+	actions, err := GetFeeds(GetFeedsOptions{
+		RequestedUser:  user,
+		Actor:          user,
+		IncludePrivate: true,
+	})
+	assert.NoError(t, err)
+	assert.Len(t, actions, 0)
+}

models/fixtures/action.yml

@@ -56,3 +56,11 @@
   repo_id: 8
   is_private: false
   created_unix: 1603011540 # grouped with id:7
+
+- id: 8
+  user_id: 1
+  op_type: 12 # close issue
+  act_user_id: 1
+  repo_id: 1700 # dangling intentional
+  is_private: false
+  created_unix: 1603011541

models/unittest/consistency.go

@@ -175,8 +175,10 @@ func init() {
 
 	checkForActionConsistency := func(t assert.TestingT, bean interface{}) {
 		action := reflectionWrap(bean)
-		repoRow := AssertExistsAndLoadMap(t, "repository", builder.Eq{"id": action.int("RepoID")})
-		assert.Equal(t, parseBool(repoRow["is_private"]), action.bool("IsPrivate"), "action: %+v", action)
+		if action.int("RepoID") != 1700 { // dangling intentional
+			repoRow := AssertExistsAndLoadMap(t, "repository", builder.Eq{"id": action.int("RepoID")})
+			assert.Equal(t, parseBool(repoRow["is_private"]), action.bool("IsPrivate"), "action: %+v", action)
+		}
 	}
 
 	consistencyCheckMap["user"] = checkForUserConsistency

routers/web/feed/profile.go

@@ -34,6 +34,9 @@ func RetrieveFeeds(ctx *context.Context, options models.GetFeedsOptions) []*mode
 	}
 
 	for _, act := range actions {
+		if act.Repo == nil {
+			continue
+		}
 		repoOwner, ok := userCache[act.Repo.OwnerID]
 		if !ok {
 			repoOwner, err = user_model.GetUserByID(act.Repo.OwnerID)