GTMonRails

GTMonRails enables you to integrate Google Tag Manager easy with Rails application.

GTMonRails not only embed Google Tag Manager snippet, but simply operate and send JavaScript's variable 'dataLayer' for GTM in Ruby code.

GTMonRails basically can't be used only this, you have to set up Tag and Trigger on Google Tag Manager.

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Installation

Add this line to your application's Gemfile:

gem 'gtm_on_rails'

And then execute:

$ bundle

And then run initial settings:

$ rails g gtm_on_rails:install

Configure

Edit the /config/initializers/gtm_on_rails.rb file and customize following settings.

container_id

Set your Google Tag Manager container ID.

data_layer_limit_byte_size

DataLayer is limited by bytesize at once post. If post size is over this bytesize, exception occured.

send_controller_and_action_in_data_layer

Settings that send google tag manager controller and action name by dataLayer. Be careful using this, if you enable this option, controller and action name output in html source code.

rescue_when_error_occurred

If somthing error occurred when output tags, subsequent tag's output is stopped and run subsequent processing. The point is, dataLayer error won't affect displaying website, if you enable this option.

ecommerce_default_currency

Default local currency code when use Enhanced Ecommerce. The local currency must be specified in the ISO 4217 standard.

BasicUsage

Basic

You only push Hash object in data_layer variable, can send values what you want by dataLayer. Usually I’d say you write like the following code in contoller.

data_layer.push({
  name: 'name'
})

Configure the variable and so on Google Tag Manager when use sended values.

data_layer.push(
  {
    name: 'name'
  },
  before_page_view: true
)

You also can set dataLayer values before the "Page View" event of Google Tag Manager, when you use before_page_view option as the above.

For examle, you use this option when want to use dataLayer's variables in the "Page View" event.

† Be careful of using this option, because you may not be measure PageView normalcy, when you send Hit type event to GoogleAnalytics before send PageView.

GtmOnRails::DataLayer::Object

object = GtmOnRails::DataLayer::Object.new({name: 'name'})
data_layer.push(object)

You also can use GtmOnRails::DataLayer::Object object rather than Hash as the above.

object = GtmOnRails::DataLayer::Object.new({name: 'name'})
object.name
object.name = 'name2'

You can access values with GtmOnRails::DataLayer::Object object as the above.

GtmOnRails::DataLayer::Event

event = GtmOnRails::DataLayer::Event.new('event_name', {name: 'name'})
data_layer.push(event)

You can send dataLayer with Google Tag Manager's event name, when write like the above code.

Enhanced Ecommerce

You can use Enhanced Ecommerce of Google Analytics easily using GTMonRails. Please look official help about details of Enhanced Ecommerce. https://developers.google.com/analytics/devguides/collection/analyticsjs/enhanced-ecommerce https://developers.google.com/tag-manager/enhanced-ecommerce

Basis

Enhanced Ecommerce has the following 4 types of data object,

• Impression
• Product
• Promotion
• Action

and, the following 10 types of measuring activity object.

• Product Impressions(product_impression)
• Product Clicks(product_click)
• Views of Product Details(product_detail)
• Adding a Product to a Shopping Cart(add_to_cart)
• Removing a Product from a Shopping Cart(remove_from_cart)
• Promotion Impressions(promotion_impression)
• Promotion Clicks(promotion_click)
• Checkout Steps(checkout)
• Purchases(purchase)
• Refunds(refund)

4 types of data object is used in each measuring activity objects. You enable Enhanced Ecommerce at Google Tag Manager, and 9 tyoes of measuring activity object is sent with 'dataLayer' with 'PageView' or 'Event' of Google Analytics.

Data Object

Please look official help about details of Enhanced Ecommerce data object. Only GTMonRails's own configures are described.

Impression GtmOnRails::DataLayer::Ecommerce::Impression

Official Help : https://developers.google.com/analytics/devguides/collection/analyticsjs/enhanced-ecommerce#impression-data

ex.

GtmOnRails::DataLayer::Ecommerce::Impression.new(id: '01', name: 'product_1')

Key	Description
id	In Official Help
name	In Official Help
list	In Official Help
brand	In Official Help
category	Array of String. Maximum 5.
variant	In Official Help
position	In Official Help
price	In Official Help

Product GtmOnRails::DataLayer::Ecommerce::Product

Official Help : https://developers.google.com/analytics/devguides/collection/analyticsjs/enhanced-ecommerce#product-data

ex.

GtmOnRails::DataLayer::Ecommerce::Product.new(id: '01', name: 'product_1')

Key	Description
id	In Official Help
name	In Official Help
list	In Official Help
brand	In Official Help
category	Array of String. Maximum 5.
variant	In Official Help
price	In Official Help
quantity	In Official Help
coupon	In Official Help
position	In Official Help

Promotion GtmOnRails::DataLayer::Ecommerce::Promotion

Official Help : https://developers.google.com/analytics/devguides/collection/analyticsjs/enhanced-ecommerce#promotion-data

ex.

GtmOnRails::DataLayer::Ecommerce::Promotion.new(id: '01', name: 'product_1')

Key	Description
id	In Official Help
name	In Official Help
creative	In Official Help
position	In Official Help

Action GtmOnRails::DataLayer::Ecommerce::Action

Official Help : https://developers.google.com/analytics/devguides/collection/analyticsjs/enhanced-ecommerce#action-data

ex.

GtmOnRails::DataLayer::Ecommerce::Action.new(list: 'general product list')

Key	Description
id	In Official Help
affiliation	In Official Help
revenue	In Official Help
tax	In Official Help
shipping	In Official Help
coupon	In Official Help
list	In Official Help
step	In Official Help
option	In Official Help

Measuring Activity Object

Please look official help about details of Enhanced Ecommerce data object. Only GTMonRails's own configures are described.

Product Impressions(product_impression)

Official Help : https://developers.google.com/tag-manager/enhanced-ecommerce#product-impressions

You need to send this activity to GoogleAnalytics as 'PageView'.

ex.

GtmOnRails::DataLayer::Ecommerce.product_impression(impressions: impressions)

Key	Description
currency	Local currency. The local currency must be specified in the ISO 4217 standard. Default value is configured in config/initializers/gtm_o_rails.rb.
impressions	Array of GtmOnRails::DataLayer::Ecommerce::Impression object or Hash.

Product Clicks(product_click)

Official Help : https://developers.google.com/tag-manager/enhanced-ecommerce#product-clicks

You need to send this activity to GoogleAnalytics as 'Event'.

ex.

GtmOnRails::DataLayer::Ecommerce.product_click(action: action, products: products)

Key	Description
currency	Local currency. The local currency must be specified in the ISO 4217 standard. Default value is configured in config/initializers/gtm_o_rails.rb.
action	GtmOnRails::DataLayer::Ecommerce::Action object or Hash.
products	Array of GtmOnRails::DataLayer::Ecommerce::Product object or Hash.

Views of Product Details(product_detail)

Official Help : https://developers.google.com/tag-manager/enhanced-ecommerce#details

You need to send this activity to GoogleAnalytics as 'PageView'.

ex.

GtmOnRails::DataLayer::Ecommerce.product_detail(action: action, products: products)

Key	Description
currency	Local currency. The local currency must be specified in the ISO 4217 standard. Default value is configured in config/initializers/gtm_o_rails.rb.
action	GtmOnRails::DataLayer::Ecommerce::Action object or Hash.
products	Array of GtmOnRails::DataLayer::Ecommerce::Product object or Hash.

Adding a Product to a Shopping Cart(add_to_cart)

Official Help : https://developers.google.com/tag-manager/enhanced-ecommerce#add

You need to send this activity to GoogleAnalytics as 'Event'.

ex.

GGtmOnRails::DataLayer::Ecommerce.add_to_cart(products: products)

Key	Description
currency	Local currency. The local currency must be specified in the ISO 4217 standard. Default value is configured in config/initializers/gtm_o_rails.rb.
products	Array of GtmOnRails::DataLayer::Ecommerce::Product object or Hash.

Removing a Product from a Shopping Cart(remove_from_cart)

Official Help : https://developers.google.com/tag-manager/enhanced-ecommerce#add

You need to send this activity to GoogleAnalytics as 'Event'.

ex.

GtmOnRails::DataLayer::Ecommerce.remove_from_cart(products: products)

Key	Description
currency	Local currency. The local currency must be specified in the ISO 4217 standard. Default value is configured in config/initializers/gtm_o_rails.rb.
products	Array of GtmOnRails::DataLayer::Ecommerce::Product object or Hash.

Promotion Impressions(promotion_impression)

Official Help : https://developers.google.com/tag-manager/enhanced-ecommerce#promo-impressions

You need to send this activity to GoogleAnalytics as 'PageView'.

ex.

GtmOnRails::DataLayer::Ecommerce.promotion_impression(promotions: promotions)

Key	Description
currency	Local currency. The local currency must be specified in the ISO 4217 standard. Default value is configured in config/initializers/gtm_o_rails.rb.
promotions	Array of GtmOnRails::DataLayer::Ecommerce::Promotion object or Hash.

Promotion Clicks(promotion_click)

Official Help : https://developers.google.com/tag-manager/enhanced-ecommerce#promo-clicks

You need to send this activity to GoogleAnalytics as 'Event'.

ex.

GtmOnRails::DataLayer::Ecommerce.promotion_click(promotions: promotions)

Key	Description
currency	Local currency. The local currency must be specified in the ISO 4217 standard. Default value is configured in config/initializers/gtm_o_rails.rb.
promotions	Array of GtmOnRails::DataLayer::Ecommerce::Promotion object or Hash.

Checkout Steps(checkout)

Official Help : https://developers.google.com/tag-manager/enhanced-ecommerce#checkoutstep

You need to send this activity to GoogleAnalytics as 'Event'.

ex.

action = GtmOnRails::DataLayer::Ecommerce::Action.new({
  step: 1
})
GtmOnRails::DataLayer::Ecommerce.checkout(action: action, products: products)

Key	Description
currency	Local currency. The local currency must be specified in the ISO 4217 standard. Default value is configured in config/initializers/gtm_o_rails.rb.
action	GtmOnRails::DataLayer::Ecommerce::Action object or Hash.
products	Array of GtmOnRails::DataLayer::Ecommerce::Product object or Hash.

Purchases(purchase)

Official Help : https://developers.google.com/tag-manager/enhanced-ecommerce#purchases

You need to send this activity to GoogleAnalytics as 'PageView'.

ex.

action = GtmOnRails::DataLayer::Ecommerce::Action.new({
  id:          '01',
  affiliation: 'Online Store',
  revenue:     '35.43',
  tax:         '4.90',
  shipping:    '5.99',
  coupon:      'SUMMER_SALE'
})
GtmOnRails::DataLayer::Ecommerce.purchase(action: action, products: products)

Key	Description
currency	Local currency. The local currency must be specified in the ISO 4217 standard. Default value is configured in config/initializers/gtm_o_rails.rb.
action	GtmOnRails::DataLayer::Ecommerce::Action object or Hash.
products	Array of GtmOnRails::DataLayer::Ecommerce::Product object or Hash.

Refunds(refund)

Official Help : https://developers.google.com/tag-manager/enhanced-ecommerce#refunds

You need to send this activity to GoogleAnalytics as 'PageView'.

ex.

action = GtmOnRails::DataLayer::Ecommerce::Action.new({
  id: '01'
})
GtmOnRails::DataLayer::Ecommerce.refund(action: action)

Key	Description
currency	Local currency. The local currency must be specified in the ISO 4217 standard. Default value is configured in config/initializers/gtm_o_rails.rb.
action	GtmOnRails::DataLayer::Ecommerce::Action object or Hash.

License

The gem is available as open source under the terms of the MIT License.

Author

ykogure