feature: 增加basetype 兼容低版本数据库的json不兼容问题

server/model/common/basetypes.go

@@ -0,0 +1,35 @@
+package common
+
+import (
+	"database/sql/driver"
+	"encoding/json"
+	"errors"
+)
+
+type JSONMap map[string]interface{}
+
+// 为了兼容无json类型的数据库实现JSONMap类型的Scan和Value方法
+func (m JSONMap) Value() (driver.Value, error) {
+	if m == nil {
+		return nil, nil
+	}
+	return json.Marshal(m)
+}
+
+// Scan makes the JSONMap implement the sql.Scanner interface.
+// This method decodes a JSON-encoded value into the map structure.
+func (m *JSONMap) Scan(value interface{}) error {
+	if value == nil {
+		*m = make(map[string]interface{})
+		return nil
+	}
+	bytes, ok := value.([]byte)
+	if !ok {
+		return errors.New("Scan source was not []bytes")
+	}
+	err := json.Unmarshal(bytes, m)
+	if err != nil {
+		return err
+	}
+	return nil
+}