Comments table draft

server/migrations_pg/0003_comments_table.sql

@@ -0,0 +1,51 @@
+CREATE TABLE IF NOT EXISTS comments (
+    id BIGSERIAL PRIMARY KEY,
+    parent_post_id BIGINT NOT NULL,
+    parent_comment_id BIGINT,
+    author_user_id BIGINT NOT NULL,
+    content TEXT NOT NULL,
+    upvotes INTEGER NOT NULL DEFAULT 0,
+    downvotes INTEGER NOT NULL DEFAULT 0,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (parent_post_id) REFERENCES posts (id),
+    FOREIGN KEY (parent_comment_id) REFERENCES comments (id),
+    FOREIGN KEY (author_user_id) REFERENCES users (id)
+);
+
+-- Create a function to set created_at and updated_at on INSERT
+CREATE OR REPLACE FUNCTION comments_set_timestamps_on_insert() RETURNS TRIGGER AS $$
+BEGIN
+    NEW.created_at = NOW();
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Create a trigger to call the function after INSERT
+CREATE TRIGGER comments_set_timestamps_on_insert
+BEFORE INSERT ON posts
+FOR EACH ROW
+EXECUTE FUNCTION set_timestamps_on_insert();
+
+-- Create a function to set updated_at on UPDATE
+CREATE OR REPLACE FUNCTION comments_set_updated_at() RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Create a trigger to call the function after UPDATE
+CREATE TRIGGER comments_set_updated_at
+BEFORE UPDATE ON posts
+FOR EACH ROW
+EXECUTE FUNCTION comments_set_updated_at();
+
+CREATE INDEX comments_parent_post_id_index ON comments (parent_post_id);
+CREATE INDEX comments_parent_comment_id_index ON comments (parent_comment_id);
+CREATE INDEX comments_user_id_index ON comments (author_user_id);
+
+-- CREATE INDEX posts_user_id_index ON posts (user_id);
+-- CREATE INDEX posts_id_index ON posts (id);
+-- CREATE INDEX idx_created_at_desc ON posts (created_at DESC);