![]() ![]() This section includes the CSS files, basic.css and dropzone.css, which will be used for our drag and drop area: Open app/views/ and enter the following code: Now, I am going to write the client-side before moving on to the server-side implementation. To ensure that our third-party assets are precompiled with the rest of the app. Before moving on, go to myapp/config/initializers/assets.rb and add this line to the file: .precompile += %w(dropzone.js basic.css dropzone.css) This will create two views in your app/views folder and a controller in app/controllers. Open the terminal and enter the following command: rails g controller Product new create Note that we have yielded three sections: css, content, and javascript. Now go to app/views/layouts/ and make a layout template for your app. Go to myapp/app/assets/javascripts, open application.js, and remove the following lines: //= require turbolinksįor further information about //= require turbolinks please read this article. Which means to include bootstrap for our application. We don’t want this to happen, so get rid of it. This line tells Rails to require everything in this directory and all subdirectories. Open application.css and remove this line: *= require_tree. Put dropzone.js into myapp/app/assets/javascripts and all the CSS files into myapp/app/assests/stylesheets. We need to add the Javascript and CSS files for Dropzone and Bootstrap, so please go to the dist folder from the Dropzone and Bootstrap downloads and find the following files: bootstrap.css ![]() First, make a new Rails application by opening your terminal and typing: rails new myapp There is a one-to-many association between pictures and product, meaning that a product may have many images. It uploads the pictures on the server, returns the list of uploaded files, and then submits the form to create the product record. For a detailed explanation read Deploying Rails Applications With Puma.Our application is a module of an e-commerce shop to create products and attach pictures to them. Please add it as a dependency to your Gemfile, add a Procfile that specifies your production web server, and commit to git and deploy. We currently recommend using the Puma web server. Production web serverĪ production Ruby web server is capable of handling multiple requests concurrently. Rather than doing this, ensure you use a production web server. If you continue to run WEBrick it is likely that requests will take a long time, possibly timeout, and you will need to use many more dynos than your application requires. If you do not specify a web server in your Procfile, it is likely that you’re running WEBrick in production. If you need maximum performance, Heroku recommends a multi-process multi-threaded server, we currently recommend Puma. WEBrick will spawn a new thread for each request, this behavior can be fine for some applications, but due to the Global Interpreter Lock (GIL), also known as the Global Virtualmachine Lock (GVL) this means that WEBrick cannot make use of multiple cores. A production web server should be used instead. ![]() While WEBrick should be fine for development, it was not designed to handle the high concurrent workload that a Ruby app must serve in production. As this library is installed on every machine that has Ruby, most frameworks such as Rails and Rack use WEBrick as a default development web server. The Ruby standard library comes with a default web server named WEBrick. The rest of this article contains information about WEBrick and why it is not a good idea to run it in Production. When selecting a web server, make sure that it can handle concurrent requests. If you don’t have a preference we recommend configuring your application to run on Puma. Depending on the version of these libraries and what gems you have in your Gemfile, the WEBrick server may be used to run your production application.Įven if your application does not use WEBrick, it is HIGHLY recommended you do not rely on this implicit behavior and instead explicitly declare how you want your web server started via a Procfile. For Rack this means $ bundle exec rackup is run for Rails $ rails server. When you deploy a Ruby application without a Procfile, a default webserver will be used. ![]()
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