Rails multiple models per controller-DRYing up Rails Controllers: Polymorphic & Super Controllers | Orthogonal

Your website is gaining traction, and you are growing rapidly. No problem. Here is a list of metrics and questions I usually ask myself to determine whether or not my code needs refactoring. This command will search through all the files with. Please note that this number is only approximate since comment lines will be included in these totals.

Rails multiple models per controller

Rails multiple models per controller

Rails multiple models per controller

Rails multiple models per controller

Rails multiple models per controller

Multiple objects in form and controller, hitting a wall. Sign up using Facebook. Related: What are the Benefits of Ruby on Rails? Got it. As you can see, the instance variable variable is being assigned a string value within the controller's action. Many Rails models have a polymorphic relationship with other models. Jamal 6 6 gold badges 22 22 silver badges 29 29 bronze badges.

Strawberry boob. Is Your App Worth Refactoring?

Again, this Raips not an ideal example for this filter, because it's not run in Rails multiple models per controller scope of the controller but gets the controller Free teen cheerleader videos as an Rails multiple models per controller. With the output of the previous command you should see:. If you have any questions, comments, or concerns, please use StackOverflow jodels of the GitHub issue tracker:. Let's implement the flash message now in our controller. To do this, you can use flash. Getting Started All Documents. The above works for any additional fields where the parameters are simple scalar types. Most controlldr your application is going to contain bugs or otherwise throw an exception that needs to be handled. Later in this guide, we'll see some of the methods it gives us. Of course, this example is anything but elaborate and doesn't improve on the default exception handling at all, but once you can catch all those exceptions you're free moodels do whatever you want with them. The opposite and default value for this option is "attachment". Validation can fail; user. Net Framework 4. We can use this variable to tell bundler what Gemfile it should use instead of the one in the current directory.

So I'm working on a old version of a legacy app Chris and I paired on, trying to refactor some functionality and am hitting a wall.

  • In this guide you will learn how controllers work and how they fit into the request cycle in your application.
  • GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
  • This article provides a workaround for multiple models in a single view in MVC.

Your website is gaining traction, and you are growing rapidly. No problem. Here is a list of metrics and questions I usually ask myself to determine whether or not my code needs refactoring. This command will search through all the files with. Please note that this number is only approximate since comment lines will be included in these totals.

Another more precise and more informative option is to use the Rails rake task stats which outputs a quick summary of lines of code, number of classes, number of methods, the ratio of methods to classes, and the ratio of lines of code per method:. Pretend we want to write an application that tracks time for joggers. At the main page, the user can see the times they entered. The homepage will allow you to select the distance, date, and time spent jogging to create an entry similar to this:.

We also have a statistics page which is basically a weekly report that includes the average speed and distance covered per week. Notice, that the Entry model contains more than the business logic alone. It also handles some validations and callbacks.

EntriesController index gets the entries for the current user and orders the records by date created, while EntriesController create creates a new entry. No need to discuss the obvious and the responsibilities of EntriesController destroy :. It then tries to decorate the results using some private methods. Below is the view for listing the entries for the logged-in user index. This is the template that will be used to display the results of the index action method in the entries controller:.

Instead of using the same code with new and edit actions, we create a reusable partial form:. Most of you will argue refactoring this is against the KISS principle and will make the system more complicated. After all, if you check out the previous section, and the characteristics that indicate an app needs refactoring, it becomes obvious that the app in our example is not a valid candidate for refactoring.

The web server receives the request and uses routes to find out which controller to use. The controllers do the work of parsing user requests, data submissions, cookies, sessions, etc. The models are Ruby classes that talk to the database, store and validate data, perform the business logic, and otherwise do the heavy lifting. Think of them as flexible guidelines that make refactoring easier.

Before we get started, I want to discuss one more thing. If you feel you are making more separation or isolation between responsibilities even if that means adding more code and new files , then this is usually a good thing. After all, decoupling an application is a very good practice and makes it easier for us to do proper unit testing.

On the contrary, you should always start with a test to make sure things are ok before moving forward. This is a must, especially when refactoring. Then we can implement changes and make sure the tests all pass for the relevant parts of the code.

Value Object is a small object, such as a money or date range object. Their key property is that they follow value semantics rather than reference semantics. Extraction to a value object or domain model is a great convenience.

One of the biggest advantages of a Value object is the expressiveness that they help achieve in your code. Your code will tend to be far clearer, or at least it can be if you have good naming practices. Since the Value Object is an abstraction, it leads to cleaner code and fewer errors.

Another big win is immutability. The immutability of objects is very important. There is no single, one-size-fits-all answer. Do what is best for you and what makes sense in any given situation.

If you think of a group of methods is related, with Value objects they are more expressive. This expressiveness means that a Value object should represent a distinct set of data, which your average developer can deduce simply by looking at the name of the object. We have defined reader methods for our attributes and are assigning them upon initialization. We can also modify the EntryController create method to use the new value object accordingly:.

On the other hand, nothing is ever perfect. A disadvantage of Service objects is that they can be an overkill for a very simple action. In such cases, you may very well end up complicating, rather than simplifying, your code. Normally, Service objects are better for mid to large systems; those with a decent amount of logic beyond the standard CRUD operations. By applying the Service object pattern we bundle code around a specific, complex action and promote the creation of smaller, clearer methods.

Homework: consider using Value object for the WeeklyReport instead of Struct. It can be reused across different places in the application while at the same time hiding the query logic.

It also provides a good isolated unit to test. Remember in our guidelines, we agreed we wanted models to contain associations and constants, but nothing else no validations and no callbacks. Your database table model an ActiveRecord model in the context of Rails , for example, represents a single database record in code, so there is no reason for it to be concerned with anything your user is doing.

A Form object is responsible for representing a form in your application. So each input field can be treated as an attribute in the class. This enables you to put all the form logic naming conventions, validations, and so on into one place. We extracted the validations using Form objects. Rails developers usually start noticing callback pain during testing. Once the object is saved, the purpose i.

In our case, we are sending an SMS to the user after we save an entry, which is not really related to the domain of Entry.

A simple way to solve the problem is by moving the callback to the related service object. The following code shows how to use SimpleDelegator to implement our base decorator:.

This method acts as a proxy for view context. By default, the view context is an instance of a view class, the default view class being ActionView::Base. You can access view helpers as follows:. To make it more convenient, we add a decorate method to ApplicationHelper :. You can use this approach with any web framework, mobile, or console app.

By using MVC as the architecture of web apps, everything stays coupling and makes you go slower because most changes have an impact on other parts of the app. Also, it forces you to think where to put some business logic — should it go into the model, the controller, or the view?

It also makes it easier to adopt changes since it is much more modular and isolated. I hope I demonstrated how using Plain Old Ruby Objects and more abstractions decouples concerns, simplifies testing and helps produce clean, maintainable code. Subscription implies consent to our privacy policy. Thank you! Check out your inbox to confirm your invite.

By continuing to use this site you agree to our Cookie Policy. Got it. Engineering All Blogs Icon Chevron. Filter by. View all results. Eqbal Quran. Eqbal is a senior full-stack developer with more than a decade of experience working in web and mobile development. Read the Spanish version of this article translated by Marisela Ordaz.

Is Your App Worth Refactoring? Slow unit tests. PORO unit tests usually run fast with well-isolated code, so slow running tests can often be an indicator of a bad design and overly-coupled responsibilities. FAT models or controllers. A model or controller with more than lines of code LOC is generally a good candidate for refactoring. Excessively large code base. We need a report page that displays the average speed and distance per week.

The homepage will allow you to select the distance, date, and time spent jogging to create an entry similar to this: We also have a statistics page which is basically a weekly report that includes the average speed and distance covered per week. You can check out the online sample here. As for the Entry model, it contains the business logic for our application.

Each Entry belongs to a User. Gist sample Notice, that the Entry model contains more than the business logic alone. So does this application really need refactoring? ActiveRecord models can contain associations and constants, but nothing else. So that means no callbacks use service objects and add the callbacks there and no validations use Form objects to include naming and validations for the model. Keep Controllers as thin layers and always call Service objects.

This eliminates the framework noise and helps to focus on your code. Devise comes with OmniAuth support out of the box to authenticate with other providers. Models do the grunt work, views are the happy face, and controllers are the masterminds behind it all. So self[] it is. Rails allows you to stream more than just files. These types of fixtures have the. You can view them here:.

Rails multiple models per controller

Rails multiple models per controller

Rails multiple models per controller

Rails multiple models per controller

Rails multiple models per controller

Rails multiple models per controller. BetterExplained Books for Kindle and Print

The Railscast on Simple OmniAuth should also help setting this up. Getting Started All Documents. MIT License. Copyright Plataformatec. Skip to content. Dismiss Document your code Every project on GitHub comes with a version-controlled wiki to give your documentation the high level of care it deserves. Sign up for free See pricing for teams and enterprises.

OmniAuth with multiple models Jump to bottom. So to allow OmniAuth authentication for multiple models: Remove the :omniauthable argument from your models. Pages Send an email to opensource plataformatec. If you have any questions, comments, or concerns, please use StackOverflow instead of the GitHub issue tracker:.

If you need to use Devise with previous versions of Rails, you can always run "gem server" from the command line after you install the gem to access the old documentation. There are a few example applications available on GitHub that demonstrate various features of Devise with different versions of Rails.

You can view them here:. Our community has created a number of extensions that add functionality above and beyond what is included with Devise. You can view a list of available extensions and add your own here:. We hope that you will consider contributing to Devise. Please read this short overview for some information about how to get started:. You will usually want to write tests for your changes. To run the tests for mongoid, you can pass mongoid :.

When running the tests for Mongoid, you will need to have a MongoDB server version 2. We can use this variable to tell bundler what Gemfile it should use instead of the one in the current directory. Inside the gemfiles directory, we have one for each version of Rails we support. When you send us a pull request, it may happen that the test suite breaks on Travis using some of them. For example, if the tests broke using Ruby 2. If you are building your first Rails application, we recommend you do not use Devise.

Devise requires a good understanding of the Rails Framework. In such cases, we advise you to start a simple authentication system from scratch. Today, we have three resources that should help you get started:. Once you have solidified your understanding of Rails and authentication mechanisms, we assure you Devise will be very pleasant to work with.

At this point, a number of instructions will appear in the console. Among these instructions, you'll need to set up the default URL options for the Devise mailer in each environment.

The generator will install an initializer which describes ALL of Devise's configuration options. It is imperative that you take a look at it. When you are done, you are ready to add Devise to any of your models using the generator. This will create a model if one does not exist and configure it with the default Devise modules. Next, check the MODEL for any additional configuration options you might want to add, such as confirmable or lockable.

If you add an option, be sure to inspect the migration file created by the generator if your ORM supports them and uncomment the appropriate section.

For example, if you add the confirmable option in the model, you'll need to uncomment the Confirmable section in the migration. You should restart your application after changing Devise's configuration options this includes stopping spring. Otherwise, you will run into strange errors, for example, users being unable to login and route helpers being undefined.

Devise will create some helpers to use inside your controllers and views. The same logic applies to the instructions below. After signing in a user, confirming the account or updating the password, Devise will look for a scoped root path to redirect to. This means that you need to set the root inside your routes:. Notice that if your Devise model is called Member instead of User , for example, then the helpers available are:. The Devise method in your models also accepts some options to configure its modules.

For example, you can choose the cost of the hashing algorithm with:. For more details, see the initializer file that was created when you invoked the "devise:install" generator described above. When you customize your own views, you may end up adding new attributes to forms. Rails 4 moved the parameter sanitization from the model to the controller, causing Devise to handle this concern at the controller as well.

There are just three actions in Devise that allow any set of parameters to be passed down to the model, therefore requiring sanitization. Their names and default permitted parameters are:. The above works for any additional fields where the parameters are simple scalar types.

Devise allows you to completely change Devise defaults or invoke custom behaviour by passing a block:. If you have some checkboxes that express the roles a user may take on registration, the browser will send those selected checkboxes as an array. An array is not one of Strong Parameters' permitted scalars, so we need to configure Devise in the following way:.

For the list of permitted scalars, and how to declare permitted keys in nested hashes and arrays, see. If you have multiple Devise models, you may want to set up a different parameter sanitizer per model. In this case, we recommend inheriting from Devise::ParameterSanitizer and adding your own logic:. The example above overrides the permitted parameters for the user to be both :username and :email.

The non-lazy way to configure parameters would be by defining the before filter above in a custom controller. We detail how to configure and customize controllers in some sections below. We built Devise to help you quickly develop an application that uses authentication.

However, we don't want to be in your way when you need to customize it. Since Devise is an engine, all its views are packaged inside the gem.

These views will help you get started, but after some time you may want to change them. If this is the case, you just need to invoke the following generator, and it will copy all views to your application:. If you have more than one Devise model in your application such as User and Admin , you will notice that Devise uses the same views for all models.

Fortunately, Devise offers an easy way to customize views. All you need to do is set config. You can also use the generator to generate scoped views:. If you would like to generate only a few sets of views, like the ones for the registerable and confirmable module, you can pass a list of modules to the generator with the -v flag. If the customization at the views level is not enough, you can customize each controller by following these steps:.

And the sessions controller will look like this:. Remember that Devise uses flash messages to let users know if sign in was successful or unsuccessful. Devise expects your application to call flash[:notice] and flash[:alert] as appropriate. Do not print the entire flash hash, print only specific keys. In some circumstances, Devise adds a :timedout key to the flash hash, which is not meant for display. Remove this key from the hash if you intend to print the entire hash.

Devise also ships with default routes. Devise uses flash messages with I18n, in conjunction with the flash keys :notice and :alert. To customize your app, you can set up your locale file:. You can also create distinct messages based on the resource you've configured using the singular name given in routes:.

Take a look at our locale file to check all available messages. You may also be interested in one of the many translations that are available on our wiki:. Caution: Devise Controllers inherit from ApplicationController. If your app uses multiple locales, you should be sure to set I18n. Devise includes some test helpers for controller and integration tests. For Rails 5, include Devise::Test::IntegrationHelpers instead, since the superclass for controller tests has been changed to ActionDispatch::IntegrationTest for more details, see the Integration tests section.

If you are testing Devise internal controllers or a controller that inherits from Devise's, you need to tell Devise which mapping should be used before a request.

This is necessary because Devise gets this information from the router, but since controller tests do not pass through the router, it needs to be stated explicitly. For example, if you are testing the user scope, simply use:. Integration test helpers are available by including the Devise::Test::IntegrationHelpers module. RSpec users can include the IntegrationHelpers module on their :feature specs. Unlike controller tests, integration tests do not need to supply the devise.

Devise comes with OmniAuth support out of the box to authenticate with other providers. Devise allows you to set up as many Devise models as you want.

Multiple controllers/views for one model - Rails - Ruby-Forum

So I'm working on a old version of a legacy app Chris and I paired on, trying to refactor some functionality and am hitting a wall. I currently have some basic paging functionality which creates a "page" message , and then sends it out to each unit vehicle thusly.

It's a very simple implementation and works well, but I'm trying to expand it so I can page units within a specific region instead of one by one or all. Here's what my models, views, and controllers look like so far. I've already refactored the pagings controller create method to make it cleaner and more DRY, but I'm having a hard time figuring out how to send pages to either a unit, units all , or units by region. I'm right in the middle of working on this code so things are not working properly and could use some guidance.

So two problems I'm facing right now. My initial thought was to assign it to a variable like so:. From there I should be able to do something like this:. This is where I'm stuck. I'm unsure as to how to handle the region variable inside my existing create method to create a new page and page it out to each unit within that region without breaking the existing architecture.

Sorry if this is a bit scattered, but I'd like to discuss how I might be able to do this. Multiple objects in form and controller, hitting a wall. Report spam. Login or Create An Account to join the conversation. More of a social being?

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Rails multiple models per controller

Rails multiple models per controller