ruby-on-railsrubyhashahoy

Querying Ahoy Gem Events


I am using the Ahoy gem in a Rails 4.2 app. Ahoy Events stores events with a number of text attributes and a properties attribute that contains data I want to query. For example here is the last event I return via the rails console

>> Ahoy::Event.last Ahoy::Event Load (3.8ms) SELECT "ahoy_events".* FROM "ahoy_events" ORDER BY "ahoy_events"."id" DESC LIMIT 1 => #<Ahoy::Event id: "fffff17f-44e6-41d7-9c32-fa895338f54e", visit_id: "6b05b1ca-3863-46da-9c48-a3ab5fa4a9ee", user_id: 1, name: "$click", properties: {"tag"=>"a", "page"=>"/conversations/2", "text"=>"View", "href"=>"/conversations/2"}, time: "2015-08-23 13:25:51">

How would I retrieve all events where properties['text'] = 'View'

I have tried Ahoy::Event.where(:properties['text'] => 'View').count

which returns: ```

Ahoy::Event.where(:properties['text'] => 'View').count NoMethodError: undefined method to_sym' for nil:NilClass from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/sanitization.rb:59:inblock in expand_hash_conditions_for_aggregates' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/sanitization.rb:58:in each' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/sanitization.rb:58:inexpand_hash_conditions_for_aggregates' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/relation/query_methods.rb:957:in build_where' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/relation/query_methods.rb:584:inwhere!' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/relation/query_methods.rb:574:in where' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activerecord-4.2.5.1/lib/active_record/querying.rb:10:inwhere' from (irb):13 from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/console.rb:110:in start' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/console.rb:9:instart' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:68:in console' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:39:inrun_command!' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/railties-4.2.5.1/lib/rails/commands.rb:17:in <top (required)>' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:inrequire' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in block in require' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:inload_dependency' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in require' from /Users/dariusgoore/development/blackops/bin/rails:8:in' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:in load' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:inblock in load' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:in load_dependency' from /Users/dariusgoore/development/blackops/.bundle/gems/ruby/2.2.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:268:inload' from /Users/dariusgoore/.rubies/ruby-2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in require' from /Users/dariusgoore/.rubies/ruby-2.2.1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:inrequire' ```

I have looked online for querying hash attributes without success. Any guidance is much appreciated.


Solution

  • Ahoy::Event actually doesn't return anything useful. To get all records in an array return object, you need to use Ahoy::Event.all.

    So what you actually need to do is something along the lines of this:

    Ahoy::Event.all.select { |event| event.properties['text'] == "View" }.size

    The run time isn't going to be that nice but I think this is what you need.