优化“知识库模块“--基本完善

database/migrations/20250122_add_faq_best_reply.sql

@@ -0,0 +1,15 @@
+ALTER TABLE public.faq_items
+    ADD COLUMN IF NOT EXISTS best_reply_id uuid;
+
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_constraint WHERE conname = 'faq_items_best_reply_id_fkey'
+    ) THEN
+        ALTER TABLE ONLY public.faq_items
+            ADD CONSTRAINT faq_items_best_reply_id_fkey
+            FOREIGN KEY (best_reply_id) REFERENCES public.faq_replies(id) ON DELETE SET NULL;
+    END IF;
+END $$;
+
+CREATE INDEX IF NOT EXISTS ix_faq_items_best_reply_id ON public.faq_items USING btree (best_reply_id);