fix: 消除游戏下拉重复请求并优化申请范围查询

internal/data/business/query_indexes_test.go

@@ -1,12 +1,49 @@
 package business
 
 import (
+	"context"
 	"strings"
 	"testing"
 
 	"kra/internal/biz/business"
 )
 
+func TestMySQLApprovedGameIndexSupportsExistenceLookup(t *testing.T) {
+	db := openRehearsalMySQL(t)
+	for _, sql := range []string{
+		"CREATE TABLE tab_game(id INT,source_db VARCHAR(10),game_name VARCHAR(64),PRIMARY KEY(id,source_db),KEY(game_name)) ENGINE=InnoDB",
+		"CREATE TABLE tab_promote(id INT,source_db VARCHAR(10),PRIMARY KEY(id,source_db)) ENGINE=InnoDB",
+		"CREATE TABLE tab_promote_apply(id INT PRIMARY KEY,source_db VARCHAR(10),game_id INT,promote_id INT,status INT,payload VARCHAR(500)) ENGINE=InnoDB",
+		"INSERT INTO tab_game VALUES(1,'lx','游戏甲'),(1,'hw','无申请同号游戏')",
+		"INSERT INTO tab_promote VALUES(100,'lx')",
+		"INSERT INTO tab_promote_apply VALUES(1,'lx',1,100,1,'keep'),(2,'lx',1,100,0,'pending')",
+	} {
+		if err := db.Exec(sql).Error; err != nil {
+			t.Fatal(err)
+		}
+	}
+	for attempt := 0; attempt < 2; attempt++ {
+		if err := migrateApprovedGameIndexes(db); err != nil {
+			t.Fatal(err)
+		}
+	}
+	var columns []string
+	if err := db.Raw("SELECT column_name FROM information_schema.statistics WHERE table_schema=DATABASE() AND table_name='tab_promote_apply' AND index_name='idx_sw_apply_game_scope' ORDER BY seq_in_index").Scan(&columns).Error; err != nil {
+		t.Fatal(err)
+	}
+	if strings.Join(columns, ",") != "game_id,source_db,status,promote_id" {
+		t.Fatal("申请查询需要覆盖完整游戏、平台、状态和渠道条件")
+	}
+	rows, err := NewLedgerRepo(testData{db}).Games(context.Background(), business.UserScope{All: true}, nil, "", 50)
+	if err != nil || len(rows) != 1 || rows[0].SourceDB != "lx" {
+		t.Fatalf("索引不能改变游戏可见范围: %+v %v", rows, err)
+	}
+	var payload string
+	if err := db.Raw("SELECT payload FROM tab_promote_apply WHERE id=1").Scan(&payload).Error; err != nil || payload != "keep" {
+		t.Fatal("索引迁移不能修改申请数据")
+	}
+}
+
 func TestMySQLBusinessQueryIndexesAreAdditiveAndIdempotent(t *testing.T) {
 	db := openRehearsalMySQL(t)
 	definitions := map[string]string{