Add membership of object data

CHANGELOG.md

@@ -8,6 +8,7 @@
 
 **Features**
 
+- Allow JSONPath filter expression membership operators (`contains` and `in`) to operate on object/mapping data as well as arrays/sequences. See [#55](https://github.com/jg-rp/python-jsonpath/issues/55).
 - Added a `select` method to the JSONPath [query iterator interface](https://jg-rp.github.io/python-jsonpath/query/), generating a projection of each JSONPath match by selecting a subset of its values.
 - Added the `addne` and `addap` operations to [JSONPatch](https://jg-rp.github.io/python-jsonpath/api/#jsonpath.JSONPatch). `addne` (add if not exists) is like the standard `add` operation, but only adds object keys/values if the key does not exist. `addap` (add or append) is like the standard `add` operation, but assumes an index of `-` if the target index can not be resolved.
 

jsonpath/env.py

@@ -1,4 +1,5 @@
 """Core JSONPath configuration object."""
+
 from __future__ import annotations
 
 import re
@@ -548,9 +549,9 @@ def compare(  # noqa: PLR0911
             return self._lt(right, left) or self._eq(left, right)
         if operator == "<=":
             return self._lt(left, right) or self._eq(left, right)
-        if operator == "in" and isinstance(right, Sequence):
+        if operator == "in" and isinstance(right, (Mapping, Sequence)):
             return left in right
-        if operator == "contains" and isinstance(left, Sequence):
+        if operator == "contains" and isinstance(left, (Mapping, Sequence)):
             return right in left
         if operator == "=~" and isinstance(right, re.Pattern) and isinstance(left, str):
             return bool(right.fullmatch(left))

tests/test_find.py

@@ -97,6 +97,16 @@ class Case:
             }
         ],
     ),
+    Case(
+        description="object contains literal",
+        path="$[[email protected] contains 'foo']",
+        data=[{"a": {"foo": "bar"}}, {"a": {"bar": "baz"}}],
+        want=[
+            {
+                "a": {"foo": "bar"},
+            }
+        ],
+    ),
     Case(
         description="literal in array",
         path="$[?'foo' in @.a]",
@@ -107,6 +117,16 @@ class Case:
             }
         ],
     ),
+    Case(
+        description="literal in object",
+        path="$[?'foo' in @.a]",
+        data=[{"a": {"foo": "bar"}}, {"a": {"bar": "baz"}}],
+        want=[
+            {
+                "a": {"foo": "bar"},
+            }
+        ],
+    ),
 ]