ranking

CREATE TABLE daily_events (
    id          BIGSERIAL PRIMARY KEY,
    category    TEXT        NOT NULL,
    item_id     BIGINT      NOT NULL,
    score       NUMERIC(10,2) NOT NULL DEFAULT 0,
    occurred_at TIMESTAMPTZ NOT NULL DEFAULT now()

class AddSearchVectorToArticles < ActiveRecord::Migration[7.1]
  def up
    execute <<~SQL
      ALTER TABLE articles
      ADD COLUMN search_vector tsvector
      GENERATED ALWAYS AS (