ensure the correct behavior of non-required field

queryfilter/datetimefilter.py

@@ -42,6 +42,9 @@ def in_range(datum):
             else:
                 to_compare = parse(datetime_string)
 
+            if not self.start and not self.end:
+                return False
+
             if self.start and (to_compare < self.start):
                 return False
 
@@ -55,6 +58,9 @@ def in_range(datum):
     def _do_django_query(self, queryset):
         query_dict = dict()
 
+        if not self.start and not self.end:
+            return queryset.none()
+
         if self.start:
             query_dict["{}__gte".format(self.field_name)] = self.start
 

queryfilter/schemas.py

@@ -22,7 +22,7 @@ class TextFilterQueryType(graphene.InputObjectType):
     condition = graphene.Field(
         TextFilterTypes, default_value=TextFilterTypes.EQUALS.value
     )
-    value = graphene.String(description="text to query", required=True)
+    value = graphene.String(description="text to query")
 
 
 class SelectStringFilterQueryType(graphene.InputObjectType):
@@ -33,7 +33,7 @@ class SelectStringFilterQueryType(graphene.InputObjectType):
     )
 
     values = graphene.List(
-        graphene.String, description="text list to query", required=True
+        graphene.String, description="text list to query"
     )
 
 

queryfilter/tests/test_datetimefilter.py

@@ -166,3 +166,38 @@ def test_end_date_has_no_time(self):
         queryset = DatetimeFilterTestingModel.objects.all()
         result = date_filter.on_django_query(queryset)
         assert len(result) == 1
+
+
+@pytest.mark.django_db
+class TestFilterWithoutValue(object):
+
+    def test_non_required_value_should_filter_nothing(self):
+
+        datetime_datum = dateutil.parser.parse("2018-12-31T02:00:00+00:00")
+
+        DatetimeFilterTestingModel.objects.create(datetime=datetime_datum)
+        test_data = [{
+            FIELD_NAME: datetime_datum
+        }]
+
+        date_filter = DatetimeRangeFilter(FIELD_NAME, {
+            "start": '',
+            "end": '',
+        })
+
+        result = date_filter.on_dicts(test_data)
+        assert len(result) == 0
+
+        queryset = DatetimeFilterTestingModel.objects.all()
+        result = date_filter.on_django_query(queryset)
+        assert len(result) == 0
+
+        date_filter = DatetimeRangeFilter(FIELD_NAME, {
+        })
+
+        result = date_filter.on_dicts(test_data)
+        assert len(result) == 0
+
+        queryset = DatetimeFilterTestingModel.objects.all()
+        result = date_filter.on_django_query(queryset)
+        assert len(result) == 0

setup.py

@@ -18,7 +18,7 @@
 
 setup(
     name="queryfilter",
-    version="0.4.3",
+    version="0.4.4",
     description=("Allow same query interface to be shared between Django ORM,"
                  "SQLAlchemy, and GraphQL backend."),
     long_description=open(os.path.join(source_root, "README.rst")).read(),