perkeep/third_party/labix.org/v2/mgo/auth_test.go

779 lines
20 KiB
Go

// mgo - MongoDB driver for Go
//
// Copyright (c) 2010-2012 - Gustavo Niemeyer <gustavo@niemeyer.net>
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package mgo_test
import (
"camlistore.org/third_party/labix.org/v2/mgo"
. "camlistore.org/third_party/launchpad.net/gocheck"
"fmt"
"sync"
"time"
)
func (s *S) TestAuthLogin(c *C) {
// Test both with a normal database and with an authenticated shard.
for _, addr := range []string{"localhost:40002", "localhost:40203"} {
session, err := mgo.Dial(addr)
c.Assert(err, IsNil)
defer session.Close()
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|need to login|not authorized .*")
admindb := session.DB("admin")
err = admindb.Login("root", "wrong")
c.Assert(err, ErrorMatches, "auth fails")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
err = coll.Insert(M{"n": 1})
c.Assert(err, IsNil)
}
}
func (s *S) TestAuthLoginLogout(c *C) {
// Test both with a normal database and with an authenticated shard.
for _, addr := range []string{"localhost:40002", "localhost:40203"} {
session, err := mgo.Dial(addr)
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
admindb.Logout()
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|need to login|not authorized .*")
// Must have dropped auth from the session too.
session = session.Copy()
defer session.Close()
coll = session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|need to login|not authorized .*")
}
}
func (s *S) TestAuthLoginLogoutAll(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
session.LogoutAll()
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|need to login|not authorized .*")
// Must have dropped auth from the session too.
session = session.Copy()
defer session.Close()
coll = session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|need to login|not authorized .*")
}
func (s *S) TestAuthUpsertUserErrors(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
mydb := session.DB("mydb")
err = mydb.UpsertUser(&mgo.User{})
c.Assert(err, ErrorMatches, "user has no Username")
err = mydb.UpsertUser(&mgo.User{Username: "user", Password: "pass", UserSource: "source"})
c.Assert(err, ErrorMatches, "user has both Password/PasswordHash and UserSource set")
err = mydb.UpsertUser(&mgo.User{Username: "user", Password: "pass", OtherDBRoles: map[string][]mgo.Role{"db": nil}})
c.Assert(err, ErrorMatches, "user with OtherDBRoles is only supported in admin database")
}
func (s *S) TestAuthUpsertUser(c *C) {
if !s.versionAtLeast(2, 4) {
c.Skip("UpsertUser only works on 2.4+")
}
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
mydb := session.DB("mydb")
myotherdb := session.DB("myotherdb")
ruser := &mgo.User{
Username: "myruser",
Password: "mypass",
Roles: []mgo.Role{mgo.RoleRead},
}
rwuser := &mgo.User{
Username: "myrwuser",
Password: "mypass",
Roles: []mgo.Role{mgo.RoleReadWrite},
}
rwuserother := &mgo.User{
Username: "myrwuser",
UserSource: "mydb",
Roles: []mgo.Role{mgo.RoleRead},
}
err = mydb.UpsertUser(ruser)
c.Assert(err, IsNil)
err = mydb.UpsertUser(rwuser)
c.Assert(err, IsNil)
err = myotherdb.UpsertUser(rwuserother)
c.Assert(err, IsNil)
err = mydb.Login("myruser", "mypass")
c.Assert(err, IsNil)
admindb.Logout()
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|not authorized .*")
err = mydb.Login("myrwuser", "mypass")
c.Assert(err, IsNil)
err = coll.Insert(M{"n": 1})
c.Assert(err, IsNil)
// Test indirection via UserSource: we can't write to it, because
// the roles for myrwuser are different there.
othercoll := myotherdb.C("myothercoll")
err = othercoll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|not authorized .*")
// Reading works, though.
err = othercoll.Find(nil).One(nil)
c.Assert(err, Equals, mgo.ErrNotFound)
// Can't login directly into the database using UserSource, though.
err = myotherdb.Login("myrwuser", "mypass")
c.Assert(err, ErrorMatches, "auth fails")
}
func (s *S) TestAuthUpserUserOtherDBRoles(c *C) {
if !s.versionAtLeast(2, 4) {
c.Skip("UpsertUser only works on 2.4+")
}
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
ruser := &mgo.User{
Username: "myruser",
Password: "mypass",
OtherDBRoles: map[string][]mgo.Role{"mydb": []mgo.Role{mgo.RoleRead}},
}
err = admindb.UpsertUser(ruser)
c.Assert(err, IsNil)
defer admindb.RemoveUser("myruser")
admindb.Logout()
err = admindb.Login("myruser", "mypass")
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|not authorized .*")
err = coll.Find(nil).One(nil)
c.Assert(err, Equals, mgo.ErrNotFound)
}
func (s *S) TestAuthUpserUserUnsetFields(c *C) {
if !s.versionAtLeast(2, 4) {
c.Skip("UpsertUser only works on 2.4+")
}
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
// Insert a user with most fields set.
user := &mgo.User{
Username: "myruser",
Password: "mypass",
Roles: []mgo.Role{mgo.RoleRead},
OtherDBRoles: map[string][]mgo.Role{"mydb": []mgo.Role{mgo.RoleRead}},
}
err = admindb.UpsertUser(user)
c.Assert(err, IsNil)
defer admindb.RemoveUser("myruser")
// Now update the user with few things set.
user = &mgo.User{
Username: "myruser",
UserSource: "mydb",
}
err = admindb.UpsertUser(user)
c.Assert(err, IsNil)
// Everything that was unset must have been dropped.
var userm M
err = admindb.C("system.users").Find(M{"user": "myruser"}).One(&userm)
c.Assert(err, IsNil)
delete(userm, "_id")
c.Assert(userm, DeepEquals, M{"user": "myruser", "userSource": "mydb", "roles": []interface{}{}})
// Now set password again...
user = &mgo.User{
Username: "myruser",
Password: "mypass",
}
err = admindb.UpsertUser(user)
c.Assert(err, IsNil)
// ... and assert that userSource has been dropped.
err = admindb.C("system.users").Find(M{"user": "myruser"}).One(&userm)
_, found := userm["userSource"]
c.Assert(found, Equals, false)
}
func (s *S) TestAuthAddUser(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
mydb := session.DB("mydb")
err = mydb.AddUser("myruser", "mypass", true)
c.Assert(err, IsNil)
err = mydb.AddUser("mywuser", "mypass", false)
c.Assert(err, IsNil)
err = mydb.Login("myruser", "mypass")
c.Assert(err, IsNil)
admindb.Logout()
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|not authorized .*")
err = mydb.Login("mywuser", "mypass")
c.Assert(err, IsNil)
err = coll.Insert(M{"n": 1})
c.Assert(err, IsNil)
}
func (s *S) TestAuthAddUserReplaces(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
mydb := session.DB("mydb")
err = mydb.AddUser("myuser", "myoldpass", false)
c.Assert(err, IsNil)
err = mydb.AddUser("myuser", "mynewpass", true)
c.Assert(err, IsNil)
admindb.Logout()
err = mydb.Login("myuser", "myoldpass")
c.Assert(err, ErrorMatches, "auth fails")
err = mydb.Login("myuser", "mynewpass")
c.Assert(err, IsNil)
// ReadOnly flag was changed too.
err = mydb.C("mycoll").Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|not authorized .*")
}
func (s *S) TestAuthRemoveUser(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
mydb := session.DB("mydb")
err = mydb.AddUser("myuser", "mypass", true)
c.Assert(err, IsNil)
err = mydb.RemoveUser("myuser")
c.Assert(err, IsNil)
err = mydb.Login("myuser", "mypass")
c.Assert(err, ErrorMatches, "auth fails")
}
func (s *S) TestAuthLoginTwiceDoesNothing(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
oldStats := mgo.GetStats()
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
newStats := mgo.GetStats()
c.Assert(newStats.SentOps, Equals, oldStats.SentOps)
}
func (s *S) TestAuthLoginLogoutLoginDoesNothing(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
oldStats := mgo.GetStats()
admindb.Logout()
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
newStats := mgo.GetStats()
c.Assert(newStats.SentOps, Equals, oldStats.SentOps)
}
func (s *S) TestAuthLoginSwitchUser(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, IsNil)
err = admindb.Login("reader", "rapadura")
c.Assert(err, IsNil)
// Can't write.
err = coll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|not authorized .*")
// But can read.
result := struct{ N int }{}
err = coll.Find(nil).One(&result)
c.Assert(err, IsNil)
c.Assert(result.N, Equals, 1)
}
func (s *S) TestAuthLoginChangePassword(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
mydb := session.DB("mydb")
err = mydb.AddUser("myuser", "myoldpass", false)
c.Assert(err, IsNil)
err = mydb.Login("myuser", "myoldpass")
c.Assert(err, IsNil)
err = mydb.AddUser("myuser", "mynewpass", true)
c.Assert(err, IsNil)
err = mydb.Login("myuser", "mynewpass")
c.Assert(err, IsNil)
admindb.Logout()
// The second login must be in effect, which means read-only.
err = mydb.C("mycoll").Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|not authorized .*")
}
func (s *S) TestAuthLoginCachingWithSessionRefresh(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
session.Refresh()
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, IsNil)
}
func (s *S) TestAuthLoginCachingWithSessionCopy(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
session = session.Copy()
defer session.Close()
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, IsNil)
}
func (s *S) TestAuthLoginCachingWithSessionClone(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
session = session.Clone()
defer session.Close()
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, IsNil)
}
func (s *S) TestAuthLoginCachingWithNewSession(c *C) {
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
session = session.New()
defer session.Close()
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|need to login|not authorized for .*")
}
func (s *S) TestAuthLoginCachingAcrossPool(c *C) {
// Logins are cached even when the conenction goes back
// into the pool.
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
// Add another user to test the logout case at the same time.
mydb := session.DB("mydb")
err = mydb.AddUser("myuser", "mypass", false)
c.Assert(err, IsNil)
err = mydb.Login("myuser", "mypass")
c.Assert(err, IsNil)
// Logout root explicitly, to test both cases.
admindb.Logout()
// Give socket back to pool.
session.Refresh()
// Brand new session, should use socket from the pool.
other := session.New()
defer other.Close()
oldStats := mgo.GetStats()
err = other.DB("admin").Login("root", "rapadura")
c.Assert(err, IsNil)
err = other.DB("mydb").Login("myuser", "mypass")
c.Assert(err, IsNil)
// Both logins were cached, so no ops.
newStats := mgo.GetStats()
c.Assert(newStats.SentOps, Equals, oldStats.SentOps)
// And they actually worked.
err = other.DB("mydb").C("mycoll").Insert(M{"n": 1})
c.Assert(err, IsNil)
other.DB("admin").Logout()
err = other.DB("mydb").C("mycoll").Insert(M{"n": 1})
c.Assert(err, IsNil)
}
func (s *S) TestAuthLoginCachingAcrossPoolWithLogout(c *C) {
// Now verify that logouts are properly flushed if they
// are not revalidated after leaving the pool.
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
// Add another user to test the logout case at the same time.
mydb := session.DB("mydb")
err = mydb.AddUser("myuser", "mypass", true)
c.Assert(err, IsNil)
err = mydb.Login("myuser", "mypass")
c.Assert(err, IsNil)
// Just some data to query later.
err = session.DB("mydb").C("mycoll").Insert(M{"n": 1})
c.Assert(err, IsNil)
// Give socket back to pool.
session.Refresh()
// Brand new session, should use socket from the pool.
other := session.New()
defer other.Close()
oldStats := mgo.GetStats()
err = other.DB("mydb").Login("myuser", "mypass")
c.Assert(err, IsNil)
// Login was cached, so no ops.
newStats := mgo.GetStats()
c.Assert(newStats.SentOps, Equals, oldStats.SentOps)
// Can't write, since root has been implicitly logged out
// when the collection went into the pool, and not revalidated.
err = other.DB("mydb").C("mycoll").Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|not authorized .*")
// But can read due to the revalidated myuser login.
result := struct{ N int }{}
err = other.DB("mydb").C("mycoll").Find(nil).One(&result)
c.Assert(err, IsNil)
c.Assert(result.N, Equals, 1)
}
func (s *S) TestAuthEventual(c *C) {
// Eventual sessions don't keep sockets around, so they are
// an interesting test case.
session, err := mgo.Dial("localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
admindb := session.DB("admin")
err = admindb.Login("root", "rapadura")
c.Assert(err, IsNil)
err = session.DB("mydb").C("mycoll").Insert(M{"n": 1})
c.Assert(err, IsNil)
var wg sync.WaitGroup
wg.Add(20)
for i := 0; i != 10; i++ {
go func() {
defer wg.Done()
var result struct{ N int }
err := session.DB("mydb").C("mycoll").Find(nil).One(&result)
c.Assert(err, IsNil)
c.Assert(result.N, Equals, 1)
}()
}
for i := 0; i != 10; i++ {
go func() {
defer wg.Done()
err := session.DB("mydb").C("mycoll").Insert(M{"n": 1})
c.Assert(err, IsNil)
}()
}
wg.Wait()
}
func (s *S) TestAuthURL(c *C) {
session, err := mgo.Dial("mongodb://root:rapadura@localhost:40002/")
c.Assert(err, IsNil)
defer session.Close()
err = session.DB("mydb").C("mycoll").Insert(M{"n": 1})
c.Assert(err, IsNil)
}
func (s *S) TestAuthURLWrongCredentials(c *C) {
session, err := mgo.Dial("mongodb://root:wrong@localhost:40002/")
if session != nil {
session.Close()
}
c.Assert(err, ErrorMatches, "auth fails")
c.Assert(session, IsNil)
}
func (s *S) TestAuthURLWithNewSession(c *C) {
// When authentication is in the URL, the new session will
// actually carry it on as well, even if logged out explicitly.
session, err := mgo.Dial("mongodb://root:rapadura@localhost:40002/")
c.Assert(err, IsNil)
defer session.Close()
session.DB("admin").Logout()
// Do it twice to ensure it passes the needed data on.
session = session.New()
defer session.Close()
session = session.New()
defer session.Close()
err = session.DB("mydb").C("mycoll").Insert(M{"n": 1})
c.Assert(err, IsNil)
}
func (s *S) TestAuthURLWithDatabase(c *C) {
session, err := mgo.Dial("mongodb://root:rapadura@localhost:40002")
c.Assert(err, IsNil)
defer session.Close()
mydb := session.DB("mydb")
err = mydb.AddUser("myruser", "mypass", true)
c.Assert(err, IsNil)
usession, err := mgo.Dial("mongodb://myruser:mypass@localhost:40002/mydb")
c.Assert(err, IsNil)
defer usession.Close()
ucoll := usession.DB("mydb").C("mycoll")
err = ucoll.FindId(0).One(nil)
c.Assert(err, Equals, mgo.ErrNotFound)
err = ucoll.Insert(M{"n": 1})
c.Assert(err, ErrorMatches, "unauthorized|not authorized .*")
}
func (s *S) TestDefaultDatabase(c *C) {
tests := []struct{ url, db string }{
{"mongodb://root:rapadura@localhost:40002", "test"},
{"mongodb://root:rapadura@localhost:40002/admin", "admin"},
{"mongodb://localhost:40001", "test"},
{"mongodb://localhost:40001/", "test"},
{"mongodb://localhost:40001/mydb", "mydb"},
}
for _, test := range tests {
session, err := mgo.Dial(test.url)
c.Assert(err, IsNil)
defer session.Close()
c.Logf("test: %#v", test)
c.Assert(session.DB("").Name, Equals, test.db)
scopy := session.Copy()
c.Check(scopy.DB("").Name, Equals, test.db)
scopy.Close()
}
}
func (s *S) TestAuthDirect(c *C) {
// Direct connections must work to the master and slaves.
for _, port := range []string{"40031", "40032", "40033"} {
url := fmt.Sprintf("mongodb://root:rapadura@localhost:%s/?connect=direct", port)
session, err := mgo.Dial(url)
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, true)
var result struct{}
err = session.DB("mydb").C("mycoll").Find(nil).One(&result)
c.Assert(err, Equals, mgo.ErrNotFound)
}
}
func (s *S) TestAuthDirectWithLogin(c *C) {
// Direct connections must work to the master and slaves.
for _, port := range []string{"40031", "40032", "40033"} {
url := fmt.Sprintf("mongodb://localhost:%s/?connect=direct", port)
session, err := mgo.Dial(url)
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, true)
session.SetSyncTimeout(3 * time.Second)
err = session.DB("admin").Login("root", "rapadura")
c.Assert(err, IsNil)
var result struct{}
err = session.DB("mydb").C("mycoll").Find(nil).One(&result)
c.Assert(err, Equals, mgo.ErrNotFound)
}
}