By JosÇ¸ Valim
Prepare to work out Rails as you have got by no means obvious it ahead of. tips on how to expand the framework, switch its habit, and substitute entire parts to bend it in your will. 8 varied test-driven tutorials can assist you realize Rails' internal workings and get ready you to take on complex tasks with recommendations which are well-tested, modular, and simple to keep up. This moment version of the bestselling Crafting Rails purposes has been up to date to Rails four and discusses new themes reminiscent of streaming, mountable engines, and thread defense. Rails is likely one of the such a lot extensible frameworks available in the market. This pioneering publication deep-dives into the Rails plugin APIs and indicates you, the intermediate Rails developer, how one can use them to jot down larger net functions and make your daily paintings with Rails extra effective.
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Additional info for Crafting Rails 4 Applications, 2nd Edition: Expert Practices for Everyday Rails Development
Attribute_names += names end When we use class_attribute() for defining the names, it automatically works with inheritance. So if a class eventually inherits from our SampleMail fixture, it will automatically inherit all of its attribute names, too. After we run rake test, all tests should be green again, and our Mail Form implementation is finished. Whenever we need to create a contact form, we create a class that inherits from MailForm::Base, we define our attributes and the email headers, and we’re ready to go!
Ourselves. () method, under different circumstances. For instance, whenever we invoke form_for(@model), it checks whether the model is persisted. info report erratum • discuss Chapter 2. Building Models with Active Model • 26 request; if not, it should do a POST request. The same happens in url_for() when it generates a URL based on your model. In Active Record, the object is persisted if it’s saved in the database; in other words, if it’s neither a new record nor destroyed. () should always return false.
So if a class eventually inherits from our SampleMail fixture, it will automatically inherit all of its attribute names, too. After we run rake test, all tests should be green again, and our Mail Form implementation is finished. Whenever we need to create a contact form, we create a class that inherits from MailForm::Base, we define our attributes and the email headers, and we’re ready to go! To ensure it works exactly as we expect, let’s check the whole process with an integration test. 2 Integration Tests with Capybara In the previous chapter, we used Rails testing facilities to ensure a PDF was sent back to the client.