fix #302

@@ -106,9 +106,7 @@ func bootStrap() {
 						msg := fmt.Sprintf("field `%s` wrong rel_through value `%s`", fi.fullName, fi.relThrough)
 						msg := fmt.Sprintf("field `%s` wrong rel_through value `%s`", fi.fullName, fi.relThrough)
 						if i := strings.LastIndex(fi.relThrough, "."); i != -1 && len(fi.relThrough) > (i+1) {
 						if i := strings.LastIndex(fi.relThrough, "."); i != -1 && len(fi.relThrough) > (i+1) {
 							pn := fi.relThrough[:i]
 							pn := fi.relThrough[:i]
-							mn := fi.relThrough[i+1:]
-							tn := snakeString(mn)
-							rmi, ok := modelCache.get(tn)
+							rmi, ok := modelCache.getByFN(fi.relThrough)
 							if ok == false || pn != rmi.pkg {
 							if ok == false || pn != rmi.pkg {
 								err = errors.New(msg + " cannot find table")
 								err = errors.New(msg + " cannot find table")
 								goto end
 								goto end

@@ -122,7 +122,7 @@ type Post struct {
 	Content string    `orm:"type(text)"`
 	Content string    `orm:"type(text)"`
 	Created time.Time `orm:"auto_now_add"`
 	Created time.Time `orm:"auto_now_add"`
 	Updated time.Time `orm:"auto_now"`
 	Updated time.Time `orm:"auto_now"`
-	Tags    []*Tag    `orm:"rel(m2m)"`
+	Tags    []*Tag    `orm:"rel(m2m);rel_through(github.com/astaxie/beego/orm.PostTags)"`
 }
 }
 
 
 func (u *Post) TableIndex() [][]string {
 func (u *Post) TableIndex() [][]string {
@@ -148,6 +148,16 @@ func NewTag() *Tag {
 	return obj
 	return obj
 }
 }
 
 
+type PostTags struct {
+	Id   int
+	Post *Post `orm:"rel(fk)"`
+	Tag  *Tag  `orm:"rel(fk)"`
+}
+
+func (m *PostTags) TableName() string {
+	return "prefix_post_tags"
+}
+
 type Comment struct {
 type Comment struct {
 	Id      int
 	Id      int
 	Post    *Post     `orm:"rel(fk);column(post)"`
 	Post    *Post     `orm:"rel(fk);column(post)"`

@@ -146,6 +146,7 @@ func TestSyncDb(t *testing.T) {
 	RegisterModel(new(Tag))
 	RegisterModel(new(Tag))
 	RegisterModel(new(Comment))
 	RegisterModel(new(Comment))
 	RegisterModel(new(UserBig))
 	RegisterModel(new(UserBig))
+	RegisterModel(new(PostTags))
 
 
 	err := RunSyncdb("default", true, false)
 	err := RunSyncdb("default", true, false)
 	throwFail(t, err)
 	throwFail(t, err)
@@ -161,6 +162,7 @@ func TestRegisterModels(t *testing.T) {
 	RegisterModel(new(Tag))
 	RegisterModel(new(Tag))
 	RegisterModel(new(Comment))
 	RegisterModel(new(Comment))
 	RegisterModel(new(UserBig))
 	RegisterModel(new(UserBig))
+	RegisterModel(new(PostTags))
 
 
 	BootStrap()
 	BootStrap()