Skip to content


Subversion checkout URL

You can clone with
Download ZIP
Ruby JavaScript CoffeeScript
Latest commit 600e5ed @schneems schneems upgrade rails
Failed to load latest commit information.
app add GA :)
config add cache_control and set to serve static assets
db add index to data column
doc initial commit
lib initial commit
log initial commit
public devise import works
script initial commit
test initial hstore commit
vendor initial commit
.gitignore initial commit
Gemfile upgrade rails
Gemfile.lock upgrade rails update readme
Rakefile initial hstore commit initial hstore commit

Hstore Example App for Heroku

To view a working demo go to Heroku's Hstore Demo online or check out the Screencast.

Ensure you've got a recent version of Postgres (9.1 and up) by running psql --version. Upgrade if necessary. Clone this repo to your had drive. Move into that directory and run:

  gem install bundler
  bundle install

Then create a database and run your migrations

  bundle exec rake db:create
  bundle exec rake db:migrate

This migration will create Users, Products, and enable hstore in this database by executing this command in Postgres:


While the hstore column type is supported natively by Rails 4, it isn't in Rails 3 yet. Until Rails 4 is released we can use the activerecord-postgres-hstore gem. In your migration give the Products table a generic data column with a type of hstore.

  create_table :products do |t|
    t.string :name
    t.hstore :data

Now We can open up a console and store any type of hash data to the data column of products like this:

    Product.create(:name => "Geek Love: A Novel", :data => {'author' => 'Katherine Dunn', 'pages' => 368, 'category' => 'fiction'})['category']  # => 'fiction'

As you see above, we can store any types of values that we want into the hstore. We can query the keys and values in any number of ways.

      # Find all products that have a key of 'author' in data
      Product.where("data ? :key", :key => 'author')

      # Find all products that have a 'pages' and '368' key value pair in data
      Product.where("data @> (:key => :value)", :key => 'pages', :value => '368')

      # Find all products that don't have a key value pair 'pages' and '999' in data
      Product.where("not data @> (:key => :value)", :key => 'pages', :value => '999')

      # Find all products having key 'author' and value like 'ba' in data
      Product.where("data -> :key LIKE :value",     :key => 'author, :value => "%Kat%")


Richard Schneeman @Schneems for Heroku.

licensed under MIT License Copyright (c) 2011 Schneems. See LICENSE.txt for further details.

Something went wrong with that request. Please try again.