feat: v2 to v3 data conversion (#1164)

* fix: user update group notification, group member face url * fix: user update group notification, group member face url * feat: v2 to v3 data conversion * feat: v2 to v3 data conversion
2026-05-05 01:25:58 +08:00 · 2023-10-08 12:11:42 +08:00
parent 8dd6a05d38
commit 717ed8fd12
27 changed files with 1023 additions and 0 deletions
@@ -0,0 +1,32 @@
+package conversion
+
+import (
+	"fmt"
+	"gorm.io/gorm"
+	"gorm.io/gorm/schema"
+)
+
+func FindAndInsert[V2 any, V3 schema.Tabler](v2db *gorm.DB, v3db *gorm.DB, fn func(V2) V3) (string, error) {
+	var t V3
+	name := t.TableName()
+	if err := v3db.AutoMigrate(&t); err != nil {
+		return name, fmt.Errorf("auto migrate v3 %s failed %w", name, err)
+	}
+	const size = 100
+	for i := 0; ; i++ {
+		var v2s []V2
+		if err := v2db.Offset(i * size).Limit(size).Find(&v2s).Error; err != nil {
+			return name, fmt.Errorf("find v2 %s failed %w", name, err)
+		}
+		if len(v2s) == 0 {
+			return name, nil
+		}
+		v3s := make([]V3, 0, len(v2s))
+		for _, v := range v2s {
+			v3s = append(v3s, fn(v))
+		}
+		if err := v3db.Create(&v3s).Error; err != nil {
+			return name, fmt.Errorf("insert v3 %s failed %w", name, err)
+		}
+	}
+}