I'm writing a Rails application which will monitor data quality over some specific databases. Basically, the answer is the Model: the M from MVC, as we learned here.. Before learning web development with Rails, I really recommend learning about Ruby first. Star 1

Rails on Rails models/concerns for execute a lot of data - batch_query.rb. connection. Ruby on Rails - How to Create Perfect Enum in 5 Steps. ruby on rails - Rails: find_by_sql and virtual column . I created a simple Ruby on Rails database application that allows me to insert, remove, modify and delete new comics as I buy and sell them. Copy to clipboard. Careless use of these methods … You may configure Rails to use different databases for different models. Deprecating a Critical Rails Model Without Taking out Your Application. @tenderlove I've confirmed that it doesn't "leak" per se, but the problem is that since the memory is out-of-band, large result sets can hang around and never be GC'd as they don't create GC pressure in Ruby's VM.. To trivially demonstrate, running. Welcome back, dear readers!
Flowdock - Team Inbox With Chat for Software Developers. When your project starts you probably design ERD diagram or a similar one. It is a first class relation with its own name. At the most basic level, a SQL view is a stored query. I want to display a list with tags plus the number of elements(in my example "Tasks") for each tag.

In order to do that, I need to be able to execute direct SQL queries over these databases - which of course are not the same as the one used to drive the Rails application models. Skip to content. Then, each time when a client passes new requirements to you it’s necessary to modify it. In part 1 of this post, we did a quick overview of SQL’s window functions and views.Now, we’re going to see how we can use those features from right within Rails. Rails-SQL-Beispiel (3) Du kannst das: sql = "Select * from ... your sql query here" records_array = ActiveRecord::Base.connection.execute(sql) records_array wäre dann das Ergebnis Ihrer SQL-Abfrage in einem Array, durch das Sie iterieren können. Active Record Query InterfaceThis guide covers different ways to retrieve data from the database using Active Record.After reading this guide, you will know: How to find records using a variety of methods and conditions. … Last active Jun 13, 2016. w00x / batch_query.rb. But where ActiveRecord::Base.connection is more performant, Model.find_by_sql is more convenient. Basically, the answer is the Model: the M from MVC, as we learned here.. Before learning web development with Rails, I really recommend learning about Ruby first.