Rescue Dog

The Rescue-Dog responds HTTP status (the code and message) when raises the exception for Rails.

Installation

Add "rescue-dog" gem to your Gemfile

gem 'rescue-dog'

And run bundle install command.

Declare CRUD Actions

Include Rescue::Controller (Rescue::Controller::StaticorRescue::Controller::Dynamic`).
Call rescue_controller method.
Declare xxx_params method. (cf. Rails 4 / Strong Parameters)

Simple CRUD Actions

class UsersController < ApplicationController
  rescue_controller User, :new, :edit, :show,
    create: { render: lambda { redirect_to edit_user_path(@user) } ,rescue: lambda { render :new  } },
    update: { render: lambda { redirect_to edit_user_path(@user) } ,rescue: lambda { render :edit } },
    destroy: { render: lambda { redirect_to root_path }             ,rescue: lambda { render :edit } }

  ...

  private
  def create_params
    params.require(:user).permit(
      :name, :email, :password
    )
  end

  def update_params
    params.require(:user).permit(
      :email, :password
    )
  end

  # Destroyed condition variable object
  def destroy_params
    { id: params[:id] }
  end
end

Customized Actions

class UsersController < ApplicationController
  rescue_controller User, :new, :edit, :show

  def create
    rescue_respond(:customized_create_call, create_params,
      render: lambda { redirect_to edit_user_path(@user) },
      rescue: lambda { render :new  } }
    )
  end

  private
  def create_params
    params.require(:user).permit(
      :name, :email, :password
    )
  end

  def customized_create_call params
    if User.exists?(params)
      raise UserDuplicationError, "your email is duplicated!"
    else
      @user = User.new(params)
      @user.save!
    end
  end

end

Render Errors

Include Rescue::Controller::Static or Rescue::Controller::Dynamic.
Call rescue_associate method. And then, the exception class is defined and added to rescue_handlers.
Raise the exception or Call response_status method.

Render Static Files

Render /public/400(.:format) if you raise BadRequest exception.

class ApplicationController
   
  include Rescue::Controller::Static
  rescue_associate :BadRequest   ,with: 400
  rescue_associate :Unauthorized ,with: 401
  rescue_associate :NotFound     ,with: 404
  rescue_associate :ServerError  ,with: 500

Render Template

Render app/views/errors/404(.:format) if you raise NotFound exception.

class ApplicationController
   
  include Rescue::Controller::Dynamic
  rescue_associate :BadRequest   ,with: 400
  rescue_associate :Unauthorized ,with: 401
  rescue_associate :NotFound     ,with: 404
  rescue_associate :ServerError  ,with: 500

Associated with the exceptions

Call the response method when raise an exception.

for ActiveRecord

rescue_associate ActiveRecord::RecordNotFound ,with: 404

for Mongoid

rescue_associate Mongoid::Errors::DocumentNotFound, BSON::InvalidObjectId, with: 404

Learn more usage, check spec

Respond Application Error Codes

Include Rescue::Controller::Dynamic (NOT Rescue::Controller::Static).
Include Rescue::RespondError
Raise the exception (cf. Rescue::ApplicationError::STATUS_CODES)

class ApplicationController
  include Rescue::Controller::Dynamic
  include Rescue::RespondError

Suppress HTTP Response Codes

All responses will be returned with a 200 OK status code, even if the error occurs.

Rescue.configure do |config|
  config.suppress_response_codes = true
end

Contributing

Fork it
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Push to the branch (git push origin my-new-feature)
Create new Pull Request

LICENSE

(The MIT License)

rescue-dog

Development

Runtime