fix: drop Meta cache during update (frappe#18182)

Author: ankush

frappe/model/meta.py

@@ -56,7 +56,7 @@
 
 
 def get_meta(doctype, cached=True) -> "Meta":
-	if not cached:
+	if not cached or frappe.flags.in_patch:
 		return Meta(doctype)
 
 	if meta := frappe.cache().hget("meta", doctype):

frappe/patches.txt

@@ -211,5 +211,6 @@ frappe.patches.v14_0.set_suspend_email_queue_default
 frappe.patches.v14_0.different_encryption_key
 frappe.patches.v14_0.update_multistep_webforms
 execute:frappe.delete_doc('Page', 'background_jobs', ignore_missing=True, force=True)
+frappe.patches.v14_0.drop_meta_cache
 frappe.patches.v14_0.drop_unused_indexes
 frappe.patches.v15_0.drop_modified_index

frappe/patches/v14_0/drop_meta_cache.py

@@ -0,0 +1,7 @@
+import frappe
+
+
+def execute():
+	cache = frappe.cache()
+	for key in cache.hkeys("meta"):
+		cache.hdel("meta", key)

frappe/tests/test_perf.py

@@ -74,7 +74,7 @@ def test_req_per_seconds_basic(self):
 		"""Ideally should be ran against gunicorn worker, though I have not seen any difference
 		when using werkzeug's run_simple for synchronous requests."""
 
-		EXPECTED_RPS = 55  # measured on GHA
+		EXPECTED_RPS = 50  # measured on GHA
 		FAILURE_THREASHOLD = 0.1
 
 		req_count = 1000