Get rails associations from console

Add this some where is under /lib. For example clone_deep.rb.

module CloneDeep
  def clone_deep
    kopy = clone
    self.class.reflect_on_all_associations.each do |association|
      next if association.macro == :belongs_to
      cloned_object = case association.macro
                        when :has_many
                          self.send(association.name).collect { |item| item.clone_deep }
                        when :has_one
                          self.send(association.name) && self.send(association.name).clone_deep
                        else
                          clone
                      end
      kopy.send("#{association.name}=", cloned_object)
    end
    return kopy
  end
end

Create new initializer under config/initializers/ folder. Inside this file paste

ActiveRecord::Base.send(:include, CloneDeep)

Now you be able to clone model with all it's has_one and hos_many associations.

cloned_person = person.clone_deep
cloned_person.save

User.reflect_on_all_associations

This will return an array of associations similar to this:

#<ActiveRecord::Reflection::AssociationReflection:0x00000105575548 @macro=:has_many, @name=:posts, @options={}, @active_record=User(id: integer, login: string), @collection=false>

Sample code:

reflections = User.reflect_on_all_associations
reflections.each do |reflection|
  puts ":#{reflection.macro} => :#{reflection.name}"
end

Using the gem pry-rails you will be able to access the model, its columns and relationships. Include it in your Gemfile, then you run bundle. You can use the command show-models when you are in your pry console. and you will get the information about all your models.

You can also run show-model (Model_Name) to get information about a specific model