fix: Chart filter not working if not operator is used (backport #18194) (#18265)

* fix: Chart filter not working if not operator is used

(cherry picked from commit 3162d192b8)

* fix: added missing operators

(cherry picked from commit fc1e01555b)

Co-authored-by: Shariq Ansari <sharique.rik@gmail.com>

frappe/desk/doctype/dashboard_chart/dashboard_chart.py

@@ -215,7 +215,6 @@ def get_chart_config(chart, filters, timespan, timegrain, from_date, to_date):
 		group_by="_unit",
 		order_by="_unit asc",
 		as_list=True,
-		ignore_ifnull=True,
 	)
 
 	result = get_result(data, timegrain, from_date, to_date, chart.chart_type)

frappe/model/db_query.py

@@ -642,7 +642,7 @@ class DatabaseQuery:
 				f.value = date_range
 				fallback = f"'{FallBackDateTimeStr}'"
 
-			if f.operator in (">", "<") and (f.fieldname in ("creation", "modified")):
+			if f.operator in (">", "<", ">=", "<=") and (f.fieldname in ("creation", "modified")):
 				value = cstr(f.value)
 				fallback = f"'{FallBackDateTimeStr}'"