From 30818499eacddd3b1a3e749091ba6a1468125641 Mon Sep 17 00:00:00 2001
From: tim <timaz98@ya.ru>
Date: Thu, 16 Jun 2022 23:11:20 +0500
Subject: [PATCH] fix: merge apply

---
 example/rel-join-condition/main.go | 19 ++++++++++++++-----
 query_select.go                    | 21 +++++++++++++++++----
 2 files changed, 31 insertions(+), 9 deletions(-)

diff --git a/example/rel-join-condition/main.go b/example/rel-join-condition/main.go
index 021de1297..a132cf46b 100644
--- a/example/rel-join-condition/main.go
+++ b/example/rel-join-condition/main.go
@@ -21,7 +21,7 @@ type Profile struct {
 type User struct {
 	ID       int64 `bun:",pk,autoincrement"`
 	Name     string
-	Profiles []*Profile `bun:"rel:has-many,join:id=user_id,join_on:active IS TRUE,join_on:lang='ru'"`
+	Profiles []*Profile `bun:"rel:has-many,join:id=user_id,join_on: active IS TRUE"`
 }
 
 func main() {
@@ -45,15 +45,23 @@ func main() {
 	if err := db.NewSelect().
 		Model(user).
 		Column("user.*").
-		Relation("Profiles").
+		Relation("Profiles", func(q *bun.SelectQuery) *bun.SelectQuery {
+			return q.Where("lang = 'ru'")
+		}).
 		OrderExpr("user.id ASC").
 		Limit(1).
 		Scan(ctx); err != nil {
 		panic(err)
 	}
 
-	fmt.Println(user.ID, user.Name, user.Profiles[0])
-	// Output: 1 user &{2 ru true 1}
+	fmt.Printf("user.ID: %d, user.Name: %q\n", user.ID, user.Name)
+	fmt.Printf("user.Profiles: ")
+	for _, p := range user.Profiles {
+		fmt.Printf("%v, ", p)
+	}
+	fmt.Println()
+	// Output: 	user.ID: 1, user.Name: "user 1"
+	//			user.Profiles: &{2 ru true 1},
 }
 
 func createSchema(ctx context.Context, db *bun.DB) error {
@@ -78,7 +86,8 @@ func createSchema(ctx context.Context, db *bun.DB) error {
 	profiles := []*Profile{
 		{ID: 1, Lang: "en", Active: true, UserID: 1},
 		{ID: 2, Lang: "ru", Active: true, UserID: 1},
-		{ID: 3, Lang: "md", Active: false, UserID: 1},
+		{ID: 3, Lang: "ru", Active: false, UserID: 1},
+		{ID: 4, Lang: "md", Active: false, UserID: 1},
 	}
 	if _, err := db.NewInsert().Model(&profiles).Exec(ctx); err != nil {
 		return err
diff --git a/query_select.go b/query_select.go
index a239a4fef..32f624c73 100644
--- a/query_select.go
+++ b/query_select.go
@@ -305,19 +305,32 @@ func (q *SelectQuery) Relation(name string, apply ...func(*SelectQuery) *SelectQ
 		return q
 	}
 
+	var apply1, apply2 func(*SelectQuery) *SelectQuery
+
 	if len(join.Relation.Condition) > 0 {
-		apl := func(q *SelectQuery) *SelectQuery {
+		apply1 = func(q *SelectQuery) *SelectQuery {
+
 			for _, opt := range join.Relation.Condition {
 				q.addWhere(schema.SafeQueryWithSep(opt, nil, " AND "))
 			}
+
 			return q
 		}
-
-		join.apply = apl
 	}
 
 	if len(apply) == 1 {
-		join.apply = apply[0]
+		apply2 = apply[0]
+	}
+
+	join.apply = func(q *SelectQuery) *SelectQuery {
+		if apply1 != nil {
+			q = apply1(q)
+		}
+		if apply2 != nil {
+			q = apply2(q)
+		}
+
+		return q
 	}
 
 	return q