>> Consultant.columns.collect{|col| [col.name, col.type]}
=> [["id", :integer], ["dfa_id", :integer], ["prefix_id", :integer], ["first_name", :string], ["last_name", :string], ["birth_date", :date], ["gender", :string], ["country_id", :integer], ["zip_code", :string], ["career_level_id", :integer], ["who_am_i", :text], ["employment_status_id", :integer], ["organization_type_id", :integer], ["contract_length_id", :integer], ["services_overview", :text], ["experience_duration", :integer], ["specialties", :text], ["specialties_in_english", :text], ["salary_expectation", :string], ["availability_date", :string], ["service_level_id", :integer], ["created_at", :datetime], ["updated_at", :datetime], ["is_featured", :boolean], ["data_completeness", :integer], ["friends_count", :integer], ["status", :string], ["last_login_at", :datetime], ["permalink", :string], ["is_birth_year_hidden", :boolean], ["company_id", :integer], ["access_level", :integer], ["about_this_person", :string], ["title", :string], ["is_public", :boolean], ["signup_origin", :string], ["paypal_profile_id", :string], ["ethnicity_id", :integer], ["previous_service_level_id_backup", :integer], ["cached_tag_list", :text], ["workflow_state", :string], ["deactivated_by", :integer], ["deactivated_at", :datetime], ["created_by", :integer], ["last_bucket_update", :datetime], ["remind_me_date", :datetime], ["last_visit_date", :datetime], ["facebook_id", :string], ["linkedin_id", :string], ["version", :integer]]