Class: JupyterOnRails::Initializer

Inherits:
Object
  • Object
show all
Defined in:
lib/jupyter_on_rails/initializer.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(root:, sandbox:) ⇒ Initializer

Returns a new instance of Initializer.



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# File 'lib/jupyter_on_rails/initializer.rb', line 9

def initialize(root:, sandbox:)
  @root = root
  @sandbox = sandbox
end

Instance Attribute Details

#root ⇒ Object (readonly)

Returns the value of attribute root.



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# File 'lib/jupyter_on_rails/initializer.rb', line 14

def root
  @root
end

#sandbox ⇒ Object (readonly)

Returns the value of attribute sandbox.



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# File 'lib/jupyter_on_rails/initializer.rb', line 14

def sandbox
  @sandbox
end

Class Method Details

.run(**opts) ⇒ Object 



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# File 'lib/jupyter_on_rails/initializer.rb', line 5

def self.run(**opts)
  new(**opts).run
end

Instance Method Details

#load_rails_environment ⇒ Object 



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# File 'lib/jupyter_on_rails/initializer.rb', line 56

def load_rails_environment
  app_file = File.expand_path('config/environment.rb', root)
  Dir.chdir(root) do
    require app_file
  end
end

#run ⇒ Object 



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# File 'lib/jupyter_on_rails/initializer.rb', line 16

def run
  setup_daru
  load_rails_environment
  setup_console_methods
  setup_sandbox_transaction if sandbox
end

#setup_console_methods ⇒ Object 



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# File 'lib/jupyter_on_rails/initializer.rb', line 63

def setup_console_methods
  require 'rails/console/app'
  IRuby::Kernel
    .instance
    .instance_variable_get(:@backend)
    .instance_variable_get(:@main)
    .extend(Rails::ConsoleMethods)
end

#setup_daru ⇒ Object 



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# File 'lib/jupyter_on_rails/initializer.rb', line 23

def setup_daru
  require 'active_support/lazy_load_hooks'

  ActiveSupport.on_load(:active_record) do
    # Load Daru extensions

    require 'daru'
  rescue LoadError
  else
    require 'jupyter_on_rails/daru/active_record_ext'
    require 'jupyter_on_rails/daru/data_frame_ext'

    include ::JupyterOnRails::Daru::ActiveRecordExt

    ::Daru::DataFrame.instance_eval do
      include ::JupyterOnRails::Daru::DataFrameExt
    end

    IRuby::Display::Registry.instance_eval do
      match do |obj|
        obj.is_a?(ActiveRecord::Relation) ||
          obj.is_a?(::Class) && obj < ActiveRecord::Base && !obj.abstract_class
      end
      priority 100
      format 'text/html' do |obj|
        n = 10
        puts "finding top #{n}"
        obj.limit(n).to_df.to_html
      end
    end
  end
end

#setup_sandbox_transaction ⇒ Object 



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# File 'lib/jupyter_on_rails/initializer.rb', line 72

def setup_sandbox_transaction
  ActiveRecord::Base.connection.begin_transaction(joinable: false)
  at_exit do
    ActiveRecord::Base.connection.rollback_transaction
  end
end