Create migration for community posts likes and comments counters

cgen-ec7c0a488e3142738797a2bed6725053

supabase/migrations/20250120_add_community_posts_counters.sql

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+-- Add likes_count and comments_count columns to community_posts if they don't exist
+ALTER TABLE public.community_posts
+ADD COLUMN IF NOT EXISTS likes_count INTEGER DEFAULT 0 NOT NULL,
+ADD COLUMN IF NOT EXISTS comments_count INTEGER DEFAULT 0 NOT NULL;
+
+-- Create function to update likes_count
+CREATE OR REPLACE FUNCTION update_post_likes_count()
+RETURNS TRIGGER AS $$
+BEGIN
+  IF TG_OP = 'INSERT' THEN
+    UPDATE public.community_posts
+    SET likes_count = (SELECT COUNT(*) FROM public.community_post_likes WHERE post_id = NEW.post_id)
+    WHERE id = NEW.post_id;
+  ELSIF TG_OP = 'DELETE' THEN
+    UPDATE public.community_posts
+    SET likes_count = (SELECT COUNT(*) FROM public.community_post_likes WHERE post_id = OLD.post_id)
+    WHERE id = OLD.post_id;
+  END IF;
+  RETURN NULL;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Create function to update comments_count
+CREATE OR REPLACE FUNCTION update_post_comments_count()
+RETURNS TRIGGER AS $$
+BEGIN
+  IF TG_OP = 'INSERT' THEN
+    UPDATE public.community_posts
+    SET comments_count = (SELECT COUNT(*) FROM public.community_comments WHERE post_id = NEW.post_id)
+    WHERE id = NEW.post_id;
+  ELSIF TG_OP = 'DELETE' THEN
+    UPDATE public.community_posts
+    SET comments_count = (SELECT COUNT(*) FROM public.community_comments WHERE post_id = OLD.post_id)
+    WHERE id = OLD.post_id;
+  END IF;
+  RETURN NULL;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Drop existing triggers if they exist
+DROP TRIGGER IF EXISTS trigger_update_post_likes_count ON public.community_post_likes;
+DROP TRIGGER IF EXISTS trigger_update_post_comments_count ON public.community_comments;
+
+-- Create triggers for likes
+CREATE TRIGGER trigger_update_post_likes_count
+AFTER INSERT OR DELETE ON public.community_post_likes
+FOR EACH ROW
+EXECUTE FUNCTION update_post_likes_count();
+
+-- Create triggers for comments
+CREATE TRIGGER trigger_update_post_comments_count
+AFTER INSERT OR DELETE ON public.community_comments
+FOR EACH ROW
+EXECUTE FUNCTION update_post_comments_count();