group db

pkg/common/db/relation/utils.go

@@ -0,0 +1,25 @@
+package relation
+
+import (
+	"Open_IM/pkg/utils"
+	"gorm.io/gorm"
+)
+
+func gormPage[E any](db *gorm.DB, pageNumber, showNumber int32) (int32, []*E, error) {
+	var count int64
+	if err := db.Model(new(E)).Count(&count).Error; err != nil {
+		return 0, nil, utils.Wrap(err, "")
+	}
+	var es []*E
+	if err := db.Limit(int(showNumber)).Offset(int(pageNumber * showNumber)).Find(&es).Error; err != nil {
+		return 0, nil, utils.Wrap(err, "")
+	}
+	return int32(count), es, nil
+}
+
+func gormSearch[E any](db *gorm.DB, field string, value string, pageNumber, showNumber int32) (int32, []*E, error) {
+	if field != "" && value != "" {
+		db = db.Where(field+" like ?", "%"+value+"%")
+	}
+	return gormPage[E](db, pageNumber, showNumber)
+}