Merge pull request #1039 from astaxie/revert-1000-group_by_queryseter

Revert "Add GroupBy to QuerySeter"

@@ -800,7 +800,6 @@ func (d *dbBase) ReadBatch(q dbQuerier, qs *querySet, mi *modelInfo, cond *Condi
 	tables.parseRelated(qs.related, qs.relDepth)
 
 	where, args := tables.getCondSql(cond, false, tz)
-	groupBy := tables.getGroupSql(qs.groups)
 	orderBy := tables.getOrderSql(qs.orders)
 	limit := tables.getLimitSql(mi, offset, rlimit)
 	join := tables.getJoinSql()
@@ -813,7 +812,7 @@ func (d *dbBase) ReadBatch(q dbQuerier, qs *querySet, mi *modelInfo, cond *Condi
 		}
 	}
 
-	query := fmt.Sprintf("SELECT %s FROM %s%s%s T0 %s%s%s%s%s", sels, Q, mi.table, Q, join, where, groupBy, orderBy, limit)
+	query := fmt.Sprintf("SELECT %s FROM %s%s%s T0 %s%s%s%s", sels, Q, mi.table, Q, join, where, orderBy, limit)
 
 	d.ins.ReplaceMarks(&query)
 
@@ -937,13 +936,12 @@ func (d *dbBase) Count(q dbQuerier, qs *querySet, mi *modelInfo, cond *Condition
 	tables.parseRelated(qs.related, qs.relDepth)
 
 	where, args := tables.getCondSql(cond, false, tz)
-	groupBy := tables.getGroupSql(qs.groups)
 	tables.getOrderSql(qs.orders)
 	join := tables.getJoinSql()
 
 	Q := d.ins.TableQuote()
 
-	query := fmt.Sprintf("SELECT COUNT(*) FROM %s%s%s T0 %s%s%s", Q, mi.table, Q, join, where, groupBy)
+	query := fmt.Sprintf("SELECT COUNT(*) FROM %s%s%s T0 %s%s", Q, mi.table, Q, join, where)
 
 	d.ins.ReplaceMarks(&query)
 
@@ -1444,14 +1442,13 @@ func (d *dbBase) ReadValues(q dbQuerier, qs *querySet, mi *modelInfo, cond *Cond
 	}
 
 	where, args := tables.getCondSql(cond, false, tz)
-	groupBy := tables.getGroupSql(qs.groups)
 	orderBy := tables.getOrderSql(qs.orders)
 	limit := tables.getLimitSql(mi, qs.offset, qs.limit)
 	join := tables.getJoinSql()
 
 	sels := strings.Join(cols, ", ")
 
-	query := fmt.Sprintf("SELECT %s FROM %s%s%s T0 %s%s%s%s%s", sels, Q, mi.table, Q, join, where, groupBy, orderBy, limit)
+	query := fmt.Sprintf("SELECT %s FROM %s%s%s T0 %s%s%s%s", sels, Q, mi.table, Q, join, where, orderBy, limit)
 
 	d.ins.ReplaceMarks(&query)
 

@@ -390,30 +390,6 @@ func (t *dbTables) getCondSql(cond *Condition, sub bool, tz *time.Location) (whe
 	return
 }
 
-// generate group sql.
-func (t *dbTables) getGroupSql(groups []string) (groupSql string) {
-	if len(groups) == 0 {
-		return
-	}
-
-	Q := t.base.TableQuote()
-
-	groupSqls := make([]string, 0, len(groups))
-	for _, group := range groups {
-		exprs := strings.Split(group, ExprSep)
-
-		index, _, fi, suc := t.parseExprs(t.mi, exprs)
-		if suc == false {
-			panic(fmt.Errorf("unknown field/column name `%s`", strings.Join(exprs, ExprSep)))
-		}
-
-		groupSqls = append(groupSqls, fmt.Sprintf("%s.%s%s%s", index, Q, fi.column, Q))
-	}
-
-	groupSql = fmt.Sprintf("GROUP BY %s ", strings.Join(groupSqls, ", "))
-	return
-}
-
 // generate order sql.
 func (t *dbTables) getOrderSql(orders []string) (orderSql string) {
 	if len(orders) == 0 {

@@ -60,7 +60,6 @@ type querySet struct {
 	relDepth int
 	limit    int64
 	offset   int64
-	groups   []string
 	orders   []string
 	orm      *orm
 }
@@ -106,12 +105,6 @@ func (o querySet) Offset(offset interface{}) QuerySeter {
 	return &o
 }
 
-// add GROUP expression.
-func (o querySet) GroupBy(exprs ...string) QuerySeter {
-	o.groups = exprs
-	return &o
-}
-
 // add ORDER expression.
 // "column" means ASC, "-column" means DESC.
 func (o querySet) OrderBy(exprs ...string) QuerySeter {

@@ -845,27 +845,6 @@ func TestOffset(t *testing.T) {
 	throwFail(t, AssertIs(num, 2))
 }
 
-func TestGroupBy(t *testing.T) {
-	var users []*User
-	var maps []Params
-	qs := dORM.QueryTable("user")
-	num, err := qs.GroupBy("is_staff").Filter("user_name", "nobody").Count()
-	throwFail(t, err)
-	throwFail(t, AssertIs(num, 1))
-
-	num, err = qs.GroupBy("is_staff").Count()
-	throwFail(t, err)
-	throwFail(t, AssertIs(num, 2))
-
-	num, err = qs.GroupBy("is_staff").Values(&maps)
-	throwFail(t, err)
-	throwFail(t, AssertIs(num, 2))
-
-	num, err = qs.GroupBy("profile__age").Filter("user_name", "astaxie").All(&users)
-	throwFail(t, err)
-	throwFail(t, AssertIs(num, 1))
-}
-
 func TestOrderBy(t *testing.T) {
 	qs := dORM.QueryTable("user")
 	num, err := qs.OrderBy("-status").Filter("user_name", "nobody").Count()

@@ -67,7 +67,6 @@ type QuerySeter interface {
 	SetCond(*Condition) QuerySeter
 	Limit(interface{}, ...interface{}) QuerySeter
 	Offset(interface{}) QuerySeter
-	GroupBy(...string) QuerySeter
 	OrderBy(...string) QuerySeter
 	RelatedSel(...interface{}) QuerySeter
 	Count() (int64, error)