fix: Don't fiddle with child table indexes (#26450) (#26452)

- Link fields when referred to increase idx
- This is used in search.py to rank most referred documents higher than
- This doesn't make for child table links at all.

(cherry picked from commit 803f7b3)

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

frappe/model/base_document.py

@@ -751,13 +751,14 @@ def get_msg(df, docname):
 				# that are mapped as link_fieldname.source_fieldname in Options of
 				# Readonly or Data or Text type fields
 
+				meta = frappe.get_meta(doctype)
 				fields_to_fetch = [
 					_df
 					for _df in self.meta.get_fields_to_fetch(df.fieldname)
 					if not _df.get("fetch_if_empty")
 					or (_df.get("fetch_if_empty") and not self.get(_df.fieldname))
 				]
-				if not frappe.get_meta(doctype).get("is_virtual"):
+				if not meta.get("is_virtual"):
 					if not fields_to_fetch:
 						# cache a single value type
 						values = _dict(name=frappe.db.get_value(doctype, docname, "name", cache=True))
@@ -769,10 +770,10 @@ def get_msg(df, docname):
 						# don't cache if fetching other values too
 						values = frappe.db.get_value(doctype, docname, values_to_fetch, as_dict=True)
 
-				if getattr(frappe.get_meta(doctype), "issingle", 0):
+				if getattr(meta, "issingle", 0):
 					values.name = doctype
 
-				if frappe.get_meta(doctype).get("is_virtual"):
+				if meta.get("is_virtual"):
 					values = frappe.get_doc(doctype, docname).as_dict()
 
 				if values:
@@ -782,7 +783,8 @@ def get_msg(df, docname):
 						if self.is_new() or not self.docstatus.is_submitted() or _df.allow_on_submit:
 							self.set_fetch_from_value(doctype, _df, values)
 
-					notify_link_count(doctype, docname)
+					if not meta.istable:
+						notify_link_count(doctype, docname)
 
 					if not values.name:
 						invalid_links.append((df.fieldname, docname, get_msg(df, docname)))