fix: get single doc using client.get (#17817) (#17819)

(cherry picked from commit 0686097de2)

Co-authored-by: Ankush Menat <ankush@frappe.io>

frappe/client.py

@@ -78,7 +78,13 @@ def get(doctype, name=None, filters=None, parent=None):
 	if frappe.is_table(doctype):
 		check_parent_permission(parent, doctype)
 
-	doc = frappe.get_doc(doctype, name or frappe.parse_json(filters))
+	if name:
+		doc = frappe.get_doc(doctype, name)
+	elif filters or filters == {}:
+		doc = frappe.get_doc(doctype, frappe.parse_json(filters))
+	else:
+		doc = frappe.get_doc(doctype)  # single
+
 	doc.check_permission()
 	return doc.as_dict()
 

frappe/tests/test_client.py

@@ -139,7 +139,8 @@ class TestClient(unittest.TestCase):
 
 		self.assertEqual(get("ToDo", filters=filters).description, "test")
 		self.assertEqual(get("ToDo", filters=filters_json).description, "test")
-
+		self.assertEqual(get("System Settings", "", "").doctype, "System Settings")
+		self.assertEqual(get("ToDo", filters={}), get("ToDo", filters="{}"))
 		todo.delete()
 
 	def test_client_insert(self):