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by Dorian Karter on July 28, 2016 Rails provides before and after actions in controllers as an easy way to call methods before or after executing controller actions as response to route requests. Action Callbacks can be particularly helpful when implementing authentication/authorization for example, and are heavily used by gems such as Devise. Unfortunately this feature can be awfully painful to d
by Jack Christensen on April 23, 2015 Queries returning aggregate, summary, and computed data are frequently used in application development. Sometimes these queries are not fast enough. Caching query results using Memcached or Redis is a common approach for resolving these performance issues. However, these bring their own challenges. Before reaching for an external tool it is worth examining wha
Websocket Shootout: Clojure, C++, Elixir, Go, NodeJS, and Ruby by Jack Christensen on September 1, 2016 When a web application has a requirement for real time bidirectional communication, websockets are the natural choice. But what tools should be used to build a websocket server? Performance is important, but so is the development process. A performance benchmark alone is not enough. We also need
by Chad Brading on September 16, 2015 In this blog post we’re going to cover how to implement video chat in a Phoenix application with WebRTC. By the end of this post we will have enabled two remote clients to connect with each other and engage in a video conversation. We will use Phoenix channels to communicate messages between our two clients so they can establish a remote peer connection. WebRT
by Micah Woods on May 27, 2015 Recently, we had the opportunity to write an API endpoint that would "bulk" create thousands of users. The API needed to quickly return errors if any existed, so a background job wouldn't work in this case. Bulk insert was easy thanks to the activerecord-import gem. However, validation had to be done before bulk inserting users into the database. We had to ensure tha
by Vic Ramon on June 5, 2014 I went to see X-Men: Days of Future Past last weekend. While having a heated discussion about the logic behind the time travel in the movie with fellow Rocketeer Lucas Galego, we realized that Git provides a great analogy for time travel. So here you have it, the new X-Men movie explained in Git. SPOILER ALERT If you haven't seen the movie yet then you probably shouldn
by Jack Christensen on January 29, 2013 A new feature in PostgreSQL 9.2 is JSON support. It includes a JSON data type and two JSON functions. These allow us to return JSON directly from the database server. This article covers how it is done and includes a benchmark comparing it with traditional Rails JSON generation techniques. How To The simplest way to return JSON is with row_to_json() function
Solid user-friendly software built on time and within your budget. At Hashrocket, we have a passion for turning ideas into reality. Our world-class team is fluent in Ruby on Rails, Elixir, React, React Native, iOS, and Android, and we’re ready to design, build, and train so your product is rock-solid and user-friendly. How can we help you? We’ve built innovative applications for clients like you.
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