Fixes and improvements

common/sql/json.go

@@ -0,0 +1,29 @@
+package sql
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type SliceJSON[T any] []T
+
+func (s *SliceJSON[T]) Scan(src interface{}) error {
+	if src == nil {
+		*s = nil
+		return nil
+	}
+	var data []byte
+	switch v := src.(type) {
+	case []byte:
+		data = v
+	case string:
+		data = []byte(v)
+	default:
+		return fmt.Errorf("sliceJSON.Scan: unsupported type %T", src)
+	}
+	if len(data) == 0 {
+		*s = nil
+		return nil
+	}
+	return json.Unmarshal(data, (*[]T)(s))
+}