```ruby
# coding: UTF-8

class DataLibraryController < ApplicationController
  layout 'data_library'

  ssl_allowed :index, :search
  before_filter :get_viewed_user

  def index
    render_404 and return if @viewed_user.nil? || (Cartodb.get_config(:data_library, 'username') && (Cartodb.config[:data_library]['username'] != @viewed_user.username))

    @dataset_base_url = (Rails.env.production? || Rails.env.staging?) ? "#{request.protocol}#{CartoDB.account_host}/dataset/" : "#{@viewed_user.public_url(nil, request.protocol == "https://" ? "https" : "http")}/tables/"
    @has_new_dashboard = @viewed_user.builder_enabled? && @viewed_user.has_feature_flag?('dashboard_migration')

    respond_to do |format|
      format.html { render 'index' }
    end
  end

  private

  def get_viewed_user
    username = CartoDB.extract_subdomain(request).strip.downcase
    @viewed_user = User.where(username: username).first
  end
end
```

Use only dashboard_migration feature flag for the new views
user
```ruby
# coding: UTF-8

class DataLibraryController < ApplicationController
  layout 'data_library'

  ssl_allowed :index, :search
  before_filter :get_viewed_user

  def index
    render_404 and return if @viewed_user.nil? || (Cartodb.get_config(:data_library, 'username') && (Cartodb.config[:data_library]['username'] != @viewed_user.username))

    @dataset_base_url = (Rails.env.production? || Rails.env.staging?) ? "#{request.protocol}#{CartoDB.account_host}/dataset/" : "#{@viewed_user.public_url(nil, request.protocol == "https://" ? "https" : "http")}/tables/"
    @has_new_dashboard = @viewed_user.has_feature_flag?('dashboard_migration')

    respond_to do |format|
      format.html { render 'index' }
    end
  end

  private

  def get_viewed_user
    username = CartoDB.extract_subdomain(request).strip.downcase
    @viewed_user = User.where(username: username).first
  end
end
```
assistant