feat: Keep certain keys persistent in cache

frappe/__init__.py

@@ -1049,7 +1049,11 @@ def clear_cache(user: str | None = None, doctype: str | None = None):
 		frappe.cache_manager.clear_user_cache(user)
 	else:  # everything
 		# Delete ALL keys associated with this site.
-		frappe.cache.delete_keys("")
+		keys_to_delete = set(frappe.cache.get_keys(""))
+		for key in frappe.get_hooks("persistent_cache_keys"):
+			keys_to_delete.difference_update(frappe.cache.get_keys(key))
+		frappe.cache.delete_value(list(keys_to_delete), make_keys=False)
+
 		reset_metadata_version()
 		local.cache = {}
 		local.new_doc_templates = {}

frappe/hooks.py

@@ -546,3 +546,10 @@ default_log_clearing_doctypes = {
 	"Activity Log": 90,
 	"Route History": 90,
 }
+
+# These keys will not be erased when doing frappe.clear_cache()
+persistent_cache_keys = [
+	"update-user-set",
+	"update-info",
+	"insert_queue_for_*",  # Deferred Insert
+]

frappe/tests/test_deferred_insert.py

@@ -10,3 +10,9 @@ class TestDeferredInsert(FrappeTestCase):
 
 		save_to_db()
 		self.assertTrue(frappe.db.exists("Route History", route_history))
+
+		route_history = {"route": frappe.generate_hash(), "user": "Administrator"}
+		deferred_insert("Route History", [route_history])
+		frappe.clear_cache()  # deferred_insert cache keys are supposed to be persistent
+		save_to_db()
+		self.assertTrue(frappe.db.exists("Route History", route_history))