Ruby on Rails - Ruby on Rails - model MVC- ruby on rails tutorial - rails guides - rails tutorial - ruby rails
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Ruby on Rails - Controllers - MVC
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - mvc - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/mvc-web-model.gif)
Ruby on Rails - model in mvc :
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-view-mvc.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - find command - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-view-find-in-mvc.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - find active record - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-view-active-record-in-mvc.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - order and offset - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-view-mvc-order-and-offset.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - limit and count - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-view-mvc-limit-and-count.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - group - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-view-mvc-group.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - group by - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-view-mvc-group-by.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - group by - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-view-mvc-group-by-command.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - association - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-model-mvc-association.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - foreign key - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-model-mvc-foreign-key.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - belongs to - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-model-mvc-belongs-to.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - has many - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-model-mvc-has-many.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - has many - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-model-mvc-has-many-sql-command.png)
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model - mvc - has many - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/rails-tutorial-model-mvc-has-many-1-sql-command.png)
Ruby on Rails - Object Relational Model :
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - object relational model - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/ruby-on-rails-object-relational-model.png)
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Web Application Process in ruby on rails - MVC web server access :
Step 1 : A user clicks a link to a page in a web application
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model view controller - mvc - ruby on rails mvc web server access : A user clicks a link to a page in a web application - ruby on rails examples](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/ruby-on-rails-jobs.png)
Step 2: The web server recieves the request URL (Universal Resource Location - Uniform Resource Locator). Rails uses a routes file to match the URL with a controller action.
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model view controller - mvc - ruby on rails mvc web server access : The web server recieves the request URL (Universal Resource Location - Uniform Resource Locator). Rails uses a routes file to match the URL with a controller action.](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/ruby-on-rails-routes-controller.png)
Step 3: The invoked controller action requests data from a model. The model queries the database and hands data back to the controller
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model view controller - mvc - ruby on rails mvc web server access : The invoked controller action requests data from a model. The model queries the database and hands data back to the controller](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/model-controller-mvc-pattern-ruby-on-rails.png)
Step 4: The controller action then passes data to a corresponding view. The view uses the data and a template to compose a page.
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model view controller - mvc - ruby on rails mvc web server access : The controller action then passes data to a corresponding view. The view uses the data and a template to compose a page](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/controller-view-in-mvc-ruby-on-rails.png)
Step 5: The controller passes the complete page to the web server.
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model view controller - mvc - ruby on rails mvc web server access : The controller passes the complete page to the web server.](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/controller-in-mvc-ruby-on-rails.png)
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Step 6: The web server serves the page to the browser. The browser renders the new page in place of the first one.
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model view controller - mvc - ruby on rails mvc web server access : The web server serves the page to the browser. The browser renders the new page in place of the first one.](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/ruby-on-rails-web-server.png)
Step 7: Ruby on Rails provides a framework for this MVC flow. It enables developers to work on what makes their apps unique rather than spend time re-implementing conventions.
![learn ruby on rails - ruby on rails tutorial - ruby on rails - rails code - model view controller - mvc - ruby on rails mvc web server access : Ruby on Rails provides a framework for this MVC flow. It enables developers to work on what makes their apps unique rather than spend time re-implementing conventions.](https://wikitechy.com/tutorials/ruby-on-rails/img/ruby-on-rails-images/ruby-on-rails-mvc-complete-web-page-life-cycle.png)