1. 实现配置文件解析

2. 实现数据库连接

vendor/gorm.io/gorm/callbacks/row.go

@@ -0,0 +1,23 @@
+package callbacks
+
+import (
+	"gorm.io/gorm"
+)
+
+func RowQuery(db *gorm.DB) {
+	if db.Error == nil {
+		BuildQuerySQL(db)
+		if db.DryRun || db.Error != nil {
+			return
+		}
+
+		if isRows, ok := db.Get("rows"); ok && isRows.(bool) {
+			db.Statement.Settings.Delete("rows")
+			db.Statement.Dest, db.Error = db.Statement.ConnPool.QueryContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...)
+		} else {
+			db.Statement.Dest = db.Statement.ConnPool.QueryRowContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...)
+		}
+
+		db.RowsAffected = -1
+	}
+}