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Access the Google Analytics Core Reporting and Management APIs with Ruby. Create models for metrics and dimensions. Filter your data to tell you what you need.
 Project Readme

Legato: Ruby Client for the Google Analytics Core Reporting and Management API

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Feel free to open an issue if you have a question that is not answered in the Wiki


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If you've come here from Garb, welcome! There are a few changes from Garb, so you'll want to check out:

If you're not able to upgrade quite yet, Garb has been maintained

Google Analytics Management

  1. Get an OAuth2 Access Token from Google, Read about OAuth2

    access_token = OAuth2 Access Token # from Google
  2. Create a New User with the Access Token

    user =
  3. List the Accounts and Profiles of the first Account

  4. List all the Profiles the User has Access to

  5. Get a Profile

    profile = user.profiles.first
  6. The Profile Carries the User

    profile.user == user #=> true
  7. The profile can also lookup its "parent" Web Property


Google Analytics Model

class Exit
  extend Legato::Model

  metrics :exits, :pageviews
  dimensions :page_path, :operating_system, :browser

profile.exit #=> returns a Legato::Query
profile.exit.each {} #=> any enumerable kicks off the request to GA

Metrics & Dimensions

metrics :exits, :pageviews
dimensions :page_path, :operating_system, :browser


Create named filters to wrap query filters.

Here's what google has to say:


Inside of any Legato::Model class, the method filter is available (like metrics and dimensions).

Return entries with exits counts greater than or equal to 2000

filter(:high_exits) {gte(:exits, 2000)}

# or ...

filter :high_exits, &lambda {gte(:exits, 2000)}

Return entries with pageview metric less than or equal to 200

filter(:low_pageviews) {lte(:pageviews, 200)}

Filters with dimensions

filter(:for_browser) {|browser| matches(:browser, browser)}

Filters with OR

filter(:browsers) {|*browsers| {|browser| matches(:browser, browser)}}

Using and Chaining Filters

Pass the profile as the first or last parameter into any filter.

Exit.for_browser("Safari", profile)

Chain two filters.


Profile gets a method for each class extended by Legato::Model

Exit.results(profile) == profile.exit

We can chain off of that method, too.


Chaining order doesn't matter. Profile can be given to any filter.

Exit.high_exits(profile).low_pageviews == Exit.low_pageviews(profile).high_exits

Be sure to pass the appropriate number of arguments matching the lambda for your filter.

For a filter defined like this:

filter(:browsers) {|*browsers| {|browser| matches(:browser, browser)}}

We can use it like this, passing any number of arguments:

Exit.browsers("Firefox", "Safari", profile)

Google Analytics Supported Filtering Methods

Google Analytics supports a significant number of filtering options.

Here is what we can do currently: (the operator is a method available in filters for the appropriate metric or dimension)

Operators on metrics (method => GA equivalent):

eql     => '==',
not_eql => '!=',
gt      => '>',
gte     => '>=',
lt      => '<',
lte     => '<='

Operators on dimensions:

matches          => '==',
does_not_match   => '!=',
contains         => '=~',
does_not_contain => '!~',
substring        => '=@',
not_substring    => '!@'

Session-level Segments

Your query can have a session-level segment, which works with filter expressions. It works like an advanced segment, except you don't have to create it beforehand, you can just specify it at query time.

Some of the numbers you'll get will be different from using a filter, since the subset of visits matched happens before dimensions and metrics are calculated (hover on the segment parameter to see).

Some metrics and dimensions are not allowed for segments, see the API documentation for more details.

Note: Legato does not support Users vs Sessions, yet. The default will be sessions (the equivalent of the earlier, now removed, dynamic segments).

Defining, using and chaining segments

Return entries with exits counts greater than or equal to 2000

segment :high_exits do
  gte(:exits, 2000)

Return entries with pageview metric less than or equal to 200

segment :low_pageviews do
  lte(:pageviews, 200)

You can chain them


and call them directly on the profile


Accounts, WebProperties, Profiles, and Goals


Other Parameters Can be Passed to a call to #results

  • :start_date - The date of the period you would like this report to start
  • :end_date - The date to end, inclusive
  • :limit - The maximum number of results to be returned
  • :offset - The starting index
  • :sort - metric/dimension to sort by
  • :quota_user - any arbitrary string that uniquely identifies a user (40 characters max)
  • :sampling_level - 'FASTER' or 'HIGHER_PRECISION'
  • :segment_id - this will supersede any segments chained to the query

Real Time Reporting

GA provides an endpoint to do basic reporting in near-realtime. Please read the above documentation to know which features (and dimentsion/metrics) are or are not available. It is also only available in beta so you must already have access.

Inside of Legato, you can simply add realtime to your query (#results returns a Query instance), like this:


The results you iterate over (with .each, etc) will be from the realtime reporting API.

You can also call realtime on your model to get a new Query instance with realtime API set.

query = Exit.realtime
query.realtime? #=> true
query.tracking_scope #=> 'rt'

Managing Quotas

Assigning a quota_user or user_ip on a user instance will be used by management and query requests.

user =
user.quota_user = 'some_unique_user_identifier'
# OR
user.user_ip = ip_address_from_a_web_user_or_something