Question

here is what I am trying to do: Find if anyone has tweeted about a specific course offered. If someone has indeed tweeted about it, I’d like to save that tweet to my Tweet Model and then display that tweet in the corresponding course page.

The scripts works locally by running rails runner get_tweets.rb but on Heroku it seems that the script gets executed but doesn’t write to the database. In heroku I am running heroku run rails runner get_tweets.rb (using the Cedar stack).

def get_course_tweets
  @courses = Course.all
  @courses.each do |course|
    url = course.url
    tweets = Twitter.search(url, {:rpp => 100, :recent => true, :show_user => true})
    tweets.each do |tweet_info|
      unless Tweet.find_by_tweet_id(tweet_info.id).present?
        tweet = Tweet.new
        tweet.course_id = course.id
        tweet.tweet_id = tweet_info.id
        tweet.tweet_text = tweet_info.text
        tweet.from_user = tweet_info.from_user
        begin
          tweet.save!
        rescue => error
          puts error
        end
      end
    end
  end
end

Edit:

The current error I get from rescue is the following:

PG::Error: ERROR:  value "186306985577299969" is out of range for type integer : INSERT INTO "tweets" ("book_id", "course_id", "created_at", "from_user", "tutorial_id",     "tweet_already_exists", "tweet_id", "tweet_posted_to_reviews", "tweet_text", "updated_at") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10) RETURNING "id"

Answer 1

As can be seen from your error

value “186306985577299969” is out of range for type integer

you need to use a different datatype (for tweet_id, I believe), presumably a BIGINT, which ranges from -9223372036854775808 to 9223372036854775807.

To do so in Rails you can pass :limit => 8 in your up migration:

change_column :tweets, :tweet_id, :integer, :limit => 8

Note that you should always do some sort of logging or reporting when you rescue, or else bugs like this become very difficult to track down because they silently get bypassed.