Ruby on Rails is a server-side web application framework written in Ruby under the MIT License. Rails is a model–view–controller framework, providing default structures for a database, a web service, and web pages
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Sometimes, We need to have a task that can be executed at regular basic at some time. In ruby, we have a rake task to define and execute this task at any time. We can use rake tasks in Rails for various purposes.
Have you ever faced the following issue while fetching records from Postgres in the rails?
ActiveRecord::StatementInvalid: PG::InsufficientPrivilege: ERROR: permission denied for relation
Today I attend Ruby Conference at Pune and Singleton method and metaclass in ruby was one of the talk discussed there So, I thought to write a blog about it.
Rails follow the DRY principle of software development and that is 'Don't Repeat Yourself'. Scopes is are great to keep our code DRY and well organized. It's just a set of pre-defined SQL queries that we can use to write complex queries.
Sometimes, the implementation of an algorithm can make performance worst. Then it does not matter whether it has used the faster programming language like C or slower like Ruby. So we should implement the algorithms properly. Same while dealing with the database we should use proper queries so that the performance should not affect.