add more tool

utils/unit.go

@@ -1 +1,20 @@
 package utils
+
+import (
+	"encoding/json"
+)
+
+// 去掉struct的空字段
+func Struct2Slimming(input interface{}) (interface{}, error) {
+	bs, err := json.Marshal(input)
+	if err != nil {
+		return nil, err
+	}
+
+	var output interface{}
+	if err = json.Unmarshal(bs, &output); err != nil {
+		return nil, err
+	}
+
+	return output, nil
+}