feat: support child operator in field-selector

Author: sean2077

jsonpath/__init__.py

@@ -2,7 +2,7 @@
 Author       : zhangxianbing
 Date         : 2020-12-27 09:22:14
 LastEditors  : zhangxianbing
-LastEditTime : 2021-03-02 14:50:49
+LastEditTime : 2021-03-02 15:18:06
 Description  : JSONPath
 """
 __version__ = "1.0.3"
@@ -270,7 +270,7 @@ def _trace(self, obj, i: int, path):
             if isinstance(obj, dict):
                 obj_ = {}
                 for k in step[1:-1].split(","):
-                    obj_[k] = obj.get(k)
+                    obj_[k] = self._getattr(obj, k)
                 self._trace(obj_, i + 1, path)
             else:
                 raise ExprSyntaxError("field-extractor must acting on dict")

test/conftest.py

@@ -79,6 +79,16 @@
                 {"title": "Sayings of the Century", "price": 8.95},
             ],
         ),
+        TestCase(
+            "$.book[*].(title,brand.version)",
+            data,
+            [
+                {"title": "Sayings of the Century", "brand.version": "v1.0.0"},
+                {"title": "Sword of Honour", "brand.version": "v0.0.1"},
+                {"title": "Moby Dick", "brand.version": "v1.0.2"},
+                {"title": "The Lord of the Rings", "brand.version": "v1.0.3"},
+            ],
+        ),
     ]
 )
 def value_cases(request):