[2] pry(main)> first_post = Post.first
  Post Load (0.2ms)  SELECT  "posts".* FROM "posts"  ORDER BY "posts"."id" ASC LIMIT 1
=> #<Post:0x00000004cf8f38 id: 1, title: "First Post", body: "This is the first post in our system", created_at: Thu, 26 May 2016 00:58:20 UTC +00:00, updated_at: Thu, 26 May 2016 00:58:20 UTC +00:00>
[3] pry(main)> p first_post
#<Post id: 1, title: "First Post", body: "This is the first post in our system", created_at: "2016-05-26 00:58:20", updated_at: "2016-05-26 00:58:20">
=> #<Post:0x00000004cf8f38 id: 1, title: "First Post", body: "This is the first post in our system", created_at: Thu, 26 May 2016 00:58:20 UTC +00:00, updated_at: Thu, 26 May 2016 00:58:20 UTC +00:00>
[4] pry(main)> cd Post.first
  Post Load (0.3ms)  SELECT  "posts".* FROM "posts"  ORDER BY "posts"."id" ASC LIMIT 1
[5] pry(#<Post>):1> self.methods.sort
=> [:!,
 :!=,
 :!~,
 :<=>,
 :==,
 :===,
 :=~,
 :[],
 :[]=,
 :__binding__,
 :__id__,
 :__pry__,
 :__send__,
 :_commit_callbacks,
 :_commit_callbacks=,
 :_commit_callbacks?,
 :_create_callbacks,
 :_create_callbacks=,
 :_create_callbacks?,
 :_destroy,
 :_destroy_callbacks,
 :_destroy_callbacks=,
 :_destroy_callbacks?,
 :_find_callbacks,
 :_find_callbacks=,
 :_find_callbacks?,
 :_initialize_callbacks,
 :_initialize_callbacks=,
 :_initialize_callbacks?,
 :_read_attribute,
 :_reflections,
 :_reflections=,
 :_reflections?,
 :_rollback_callbacks,
 :_rollback_callbacks=,
 :_rollback_callbacks?,
 :_run_commit_callbacks,
 :_run_create_callbacks,
 :_run_destroy_callbacks,
 :_run_find_callbacks,
 :_run_initialize_callbacks,
 :_run_rollback_callbacks,
 :_run_save_callbacks,
 :_run_touch_callbacks,
 :_run_update_callbacks,
 :_run_validate_callbacks,
 :_run_validation_callbacks,
 :_save_callbacks,
 :_save_callbacks=,
 :_save_callbacks?,
 :_touch_callbacks,
 :_touch_callbacks=,
 :_touch_callbacks?,
 :_update_callbacks,
 :_update_callbacks=,
 :_update_callbacks?,
 :_validate_callbacks,
 :_validate_callbacks=,
 :_validate_callbacks?,
 :_validation_callbacks,
 :_validation_callbacks=,
 :_validation_callbacks?,
 :_validators,
 :_validators=,
 :_validators?,
 :`,
 :acts_like?,
 :actually_destroyed?,
 :add_to_transaction,
 :after_add_for_comments,
 :after_add_for_comments=,
 :after_add_for_comments?,
 :after_remove_for_comments,
 :after_remove_for_comments=,
 :after_remove_for_comments?,
 :aggregate_reflections,
 :aggregate_reflections=,
 :aggregate_reflections?,
 :arel_attributes_with_values_for_create,
 :arel_attributes_with_values_for_update,
 :as_json,
 :assign_attributes,
 :association,
 :association_cache,
 :attribute_aliases,
 :attribute_aliases?,
 :attribute_changed?,
 :attribute_changed_in_place?,
 :attribute_for_inspect,
 :attribute_method?,
 :attribute_method_matchers,
 :attribute_method_matchers?,
 :attribute_missing,
 :attribute_names,
 :attribute_present?,
 :attribute_was,
 :attributes,
 :attributes=,
 :attributes_before_type_cast,
 :attributes_changed_by_setter,
 :autosave_associated_records_for_comments,
 :becomes,
 :becomes!,
 :before_add_for_comments,
 :before_add_for_comments=,
 :before_add_for_comments?,
 :before_remove_for_comments,
 :before_remove_for_comments=,
 :before_remove_for_comments?,
 :blank?,
 :body,
 :body=,
 :body?,
 :body_before_type_cast,
 :body_came_from_user?,
 :body_change,
 :body_changed?,
 :body_was,
 :body_will_change!,
 :cache_key,
 :cache_timestamp_format,
 :cache_timestamp_format?,
 :capture,
 :changed,
 :changed?,
 :changed_attributes,
 :changed_for_autosave?,
 :changes,
 :changes_applied,
 :class,
 :class_eval,
 :clear_aggregation_cache,
 :clear_association_cache,
 :clear_changes_information,
 :clear_destroy_state,
 :clear_transaction_record_state,
 :clone,
 :clone_attribute_value,
 :column_for_attribute,
 :comment_ids,
 :comment_ids=,
 :comments,
 :comments=,
 :committed!,
 :concern,
 :connection_handler,
 :created_at,
 :created_at=,
 :created_at?,
 :created_at_before_type_cast,
 :created_at_came_from_user?,
 :created_at_change,
 :created_at_changed?,
 :created_at_was,
 :created_at_will_change!,
 :decrement,
 :decrement!,
 :deep_dup,
 :default_connection_handler,
 :default_connection_handler?,
 :default_scopes,
 :default_timezone,
 :define_singleton_method,
 :defined_enums,
 :defined_enums=,
 :defined_enums?,
 :delete,
 :destroy,
 :destroy!,
 :destroyed?,
 :destroyed_by_association,
 :destroyed_by_association=,
 :display,
 :dump_schema_after_migration,
 :dup,
 :duplicable?,
 :enable_warnings,
 :encode_with,
 :enum_for,
 :eql?,
 :equal?,
 :errors,
 :extend,
 :find_by_statement_cache,
 :find_by_statement_cache=,
 :find_by_statement_cache?,
 :force_clear_transaction_record_state,
 :freeze,
 :from_json,
 :from_xml,
 :frozen?,
 :gem,
 :has_attribute?,
 :hash,
 :html_safe?,
 :id,
 :id=,
 :id?,
 :id_before_type_cast,
 :id_came_from_user?,
 :id_change,
 :id_changed?,
 :id_was,
 :id_will_change!,
 :in?,
 :include_root_in_json,
 :include_root_in_json=,
 :include_root_in_json?,
 :increment,
 :increment!,
 :init_with,
 :initialize_internals_callback,
 :inspect,
 :instance_eval,
 :instance_exec,
 :instance_of?,
 :instance_values,
 :instance_variable_defined?,
 :instance_variable_get,
 :instance_variable_names,
 :instance_variable_set,
 :instance_variables,
 :invalid?,
 :is_a?,
 :itself,
 :kind_of?,
 :load_dependency,
 :lock!,
 :lock_optimistically,
 :lock_optimistically?,
 :locking_enabled?,
 :logger,
 :mark_for_destruction,
 :marked_for_destruction?,
 :method,
 :method_missing,
 :methods,
 :model_name,
 :nested_attributes_options,
 :nested_attributes_options?,
 :new_record?,
 :nil?,
 :no_touching?,
 :object_id,
 :partial_writes,
 :partial_writes?,
 :perform_validations,
 :persistable_attribute_names,
 :persisted?,
 :pluralize_table_names,
 :pluralize_table_names?,
 :populate_with_current_scope_attributes,
 :presence,
 :presence_in,
 :present?,
 :pretty_inspect,
 :pretty_print,
 :pretty_print_cycle,
 :pretty_print_inspect,
 :pretty_print_instance_variables,
 :previous_changes,
 :primary_key_prefix_type,
 :private_methods,
 :protected_methods,
 :pry,
 :psych_to_yaml,
 :public_method,
 :public_methods,
 :public_send,
 :query_attribute,
 :quietly,
 :quoted_id,
 :raise_in_transactional_callbacks,
 :raise_record_invalid,
 :read_attribute,
 :read_attribute_before_type_cast,
 :read_attribute_for_serialization,
 :read_attribute_for_validation,
 :read_store_attribute,
 :readonly!,
 :readonly?,
 :record_timestamps,
 :record_timestamps=,
 :record_timestamps?,
 :reload,
 :remember_transaction_record_state,
 :remove_instance_variable,
 :require_dependency,
 :require_or_load,
 :reset_body!,
 :reset_created_at!,
 :reset_id!,
 :reset_title!,
 :reset_updated_at!,
 :respond_to?,
 :respond_to_without_attributes?,
 :restore_attributes,
 :restore_body!,
 :restore_created_at!,
 :restore_id!,
 :restore_title!,
 :restore_transaction_record_state,
 :restore_updated_at!,
 :rollback_active_record_state!,
 :rolledback!,
 :run_callbacks,
 :run_validations!,
 :sanitize_for_mass_assignment,
 :sanitize_forbidden_attributes,
 :save,
 :save!,
 :schema_format,
 :send,
 :serializable_hash,
 :silence,
 :silence_stderr,
 :silence_stream,
 :silence_warnings,
 :singleton_class,
 :singleton_method,
 :singleton_methods,
 :skip_time_zone_conversion_for_attributes,
 :skip_time_zone_conversion_for_attributes?,
 :slice,
 :store_full_sti_class,
 :store_full_sti_class?,
 :suppress,
 :suppress_warnings,
 :table_name_prefix,
 :table_name_prefix?,
 :table_name_suffix,
 :table_name_suffix?,
 :taint,
 :tainted?,
 :tap,
 :time_zone_aware_attributes,
 :timestamped_migrations,
 :title,
 :title=,
 :title?,
 :title_before_type_cast,
 :title_came_from_user?,
 :title_change,
 :title_changed?,
 :title_was,
 :title_will_change!,
 :to_enum,
 :to_gid,
 :to_gid_param,
 :to_global_id,
 :to_json,
 :to_json_with_active_support_encoder,
 :to_json_without_active_support_encoder,
 :to_key,
 :to_model,
 :to_param,
 :to_partial_path,
 :to_query,
 :to_s,
 :to_sgid,
 :to_sgid_param,
 :to_signed_global_id,
 :to_xml,
 :to_yaml,
 :to_xml,
 :to_yaml,
 :to_yaml_properties,
 :toggle,
 :toggle!,
 :touch,
 :transaction,
 :transaction_include_any_action?,
 :transaction_record_state,
 :trust,
 :try,
 :try!,
 :type_for_attribute,
 :unloadable,
 :untaint,
 :untrust,
 :untrusted?,
 :update,
 :update!,
 :update_attribute,
 :update_attributes,
 :update_attributes!,
 :update_column,
 :update_columns,
 :updated_at,
 :updated_at=,
 :updated_at?,
 :updated_at_before_type_cast,
 :updated_at_came_from_user?,
 :updated_at_change,
 :updated_at_changed?,
 :updated_at_was,
 :updated_at_will_change!,
 :valid?,
 :validate,
 :validate!,
 :validate_associated_records_for_comments,
 :validates_absence_of,
 :validates_acceptance_of,
 :validates_confirmation_of,
 :validates_exclusion_of,
 :validates_format_of,
 :validates_inclusion_of,
 :validates_length_of,
 :validates_numericality_of,
 :validates_presence_of,
 :validates_size_of,
 :validates_with,
 :validation_context,
 :validation_context=,
 :with_lock,
 :with_options,
 :with_transaction_returning_status,
 :with_warnings,
 :write_store_attribute]
[6] pry(#<Post>):1> nesting
Nesting status:
--
0. main (Pry top level)
1. #<Post>
[7] pry(#<Post>):1> self.title = "First Post Title"
=> "First Post Title"
[8] pry(#<Post>):1> self.body = "First Post Body"
=> "First Post Body"
[9] pry(#<Post>):1> save!
   (0.1ms)  begin transaction
  SQL (2.2ms)  UPDATE "posts" SET "title" = ?, "body" = ?, "updated_at" = ? WHERE "posts"."id" = ?  [["title", "First Post Title"], ["body", "First Post Body"], ["updated_at", "2016-05-26 23:05:22.184535"], ["id", 1]]
   (120.2ms)  commit transaction
=> true
[10] pry(#<Post>):1> self
=> #<Post:0x00000004bb76b0 id: 1, title: "First Post Title", body: "First Post Body", created_at: Thu, 26 May 2016 00:58:20 UTC +00:00, updated_at: Thu, 26 May 2016 23:05:22 UTC +00:00>