feat: JSONB has key

README.md

@@ -66,6 +66,14 @@ The maps to the [`contains`](https://docs.sqlalchemy.org/en/14/dialects/postgres
 await JSONBTestModel.objects.filter(data__jsonb_contains=dict(key="value")).all()
 ```
 
+##### jsonb_has_key
+
+The maps to the [`has_key`](https://docs.sqlalchemy.org/en/14/dialects/postgresql.html#sqlalchemy.dialects.postgresql.JSONB.Comparator.has_key) operator in Postgres.
+
+```python
+await JSONBTestModel.objects.filter(data__jsonb_has_key="key1").all()
+```
+
 #### Array
 
 Array field requires a bit more setup to pass the type of the array into the field

src/ormar_postgres_extensions/fields/jsonb.py

@@ -26,10 +26,22 @@ def jsonb_contains(self, other: Any) -> ormar.queryset.clause.FilterGroup:
     return self._select_operator(op="jsonb_contains", other=other)
 
 
+def jsonb_has_key(self, other: Any) -> ormar.queryset.clause.FilterGroup:
+    """
+    works as postgresql `column ? VALUE::jsonb`
+    :param other: value to check against operator
+    :type other: Any
+    :return: FilterGroup for operator
+    :rtype: ormar.queryset.clause.FilterGroup
+    """
+    return self._select_operator(op="jsonb_has_key", other=other)
+
+
 # Need to patch the filter objects to support JSONB specifc actions
 FIELD_ACCESSOR_MAP = [
     ("jsonb_contained_by", jsonb_contained_by),
     ("jsonb_contains", jsonb_contains),
+    ("jsonb_has_key", jsonb_has_key),
 ]
 
 
@@ -42,6 +54,7 @@ def jsonb_contains(self, other: Any) -> ormar.queryset.clause.FilterGroup:
 ACCESSOR_MAP = [
     ("jsonb_contained_by", "contained_by"),
     ("jsonb_contains", "contains"),
+    ("jsonb_has_key", "has_key"),
 ]
 
 for (ormar_operation, pg_operation) in ACCESSOR_MAP:

tests/fields/test_jsonb.py

@@ -121,3 +121,27 @@ async def test_contained_by(db):
         data__jsonb_contains=dict(key1="bar")
     ).all()
     assert len(found) == 0
+
+
+@pytest.mark.asyncio
+async def test_has_key_object(db):
+    await JSONBTestModel(data=json.dumps(dict(key1="foo"))).save()
+    await JSONBTestModel(data=json.dumps(dict(key2="bar"))).save()
+
+    found = await JSONBTestModel.objects.filter(data__jsonb_has_key="key1").all()
+    assert len(found) == 1
+
+    found = await JSONBTestModel.objects.filter(data__jsonb_has_key="key3").all()
+    assert len(found) == 0
+
+
+@pytest.mark.asyncio
+async def test_has_key_array(db):
+    await JSONBTestModel(data=json.dumps(["foo"])).save()
+    await JSONBTestModel(data=json.dumps(["bar"])).save()
+
+    found = await JSONBTestModel.objects.filter(data__jsonb_has_key="foo").all()
+    assert len(found) == 1
+
+    found = await JSONBTestModel.objects.filter(data__jsonb_has_key="other").all()
+    assert len(found) == 0