Sometimes, you need to debug an error with assets generation y/o in the context of production environment, for such cases, here, I'm sharing a few steps you can follow in order to run your Rails application in production mode. Prepare your https/ssl certificates: [shell] openssl req -x509 -sha256...
latest, rspec, Testing / 16.08.2019
Having troubles with expect_any_instance_of behavior? How to expect n number of times a method is invoked?
In case you are having troubles to use the [ruby] expect_any_instance_of [/ruby] From Rspec, guess what, it is not only you, many of us have faced the same troubles before, you can see it here in the thread discussion https://github.com/rspec/rspec-mocks/issues/910 I really agree with this argument: The name of the method is...
latest, Rails, Ruby / 09.08.2019
Ruby on Rails: Benchmarking your ActiveRecord queries
First of all, in some cases, the time spent in that query is really low so maybe, a good way to see if you can improve it is to compare that functionality with the same query after making some tweaks, such as lazy loading, using...
Let's say you want to see where it is declared the method `last` from ActiveRecord, you can do so Just as simple as: [ruby] MyModel.method(:last).source_location [/ruby] There you go...
Ahora una triste historia para programadores/arquitectos de software: Erase una vez una clase llamada `God` la cual implementaba el método `create_planet` [ruby] Class God def self.create_planet Earth.new end end [/ruby] Cierto día fue invocada por primera vez [ruby] @earth = God.create_planet [/ruby] La instancia Earth(Tierra) era maravillosa y resplandeciente, llena...
A really simple retry when exceptions happen in Ruby on Rails as in this example I'm using a `find_by` from ActiveRecord ORM. [ruby] @tries = 5 def find_this_guy sleep 5 my_record = MyModel.find_by!(id: 66, other_boolean_field: true) ...
Do you want to start learning Android Java with the right foot? If you are a beginner starting with Android Java, I would highly recommend you to study and practice this incredible series of videos as you will start with the right foot and doing TDD!!! First...
backend, Ruby / 25.05.2018
Ruby: benchmark/analyze memory for CSV generation with a big collection of ActiveRecord objects
[ruby] ruby_topics = [ 'Benchmark memory when running a big query or a complex process with Ruby(Especially if you are using Heroku)', 'See how to set up a project to use a database and ActiveRecord in plain Ruby', 'Export a giant CSV file...
activerecord, backend, Rails, Ruby / 11.05.2018
Export and import/restore data for one table using ActiveRecord from Rails console
[ruby] your_model = User column_names = your_model.column_names - ['created_at', 'updated_at'] # we can ignore some unimportant fields backup_array = [] your_model.find_each(batch_size: 500) do |your_record| p_hash = {} column_names.each do |col_name| p_hash.merge!("#{col_name}" => your_record.send(col_name)) end backup_array << p_hash end [/ruby] This will create an array of...
generales / 30.04.2018
Having troubles with a gem dependency when it’s supposed to use the library from the system?
I was having troubles after switching between branches, here is the basic troubleshooting trick. [caption id="attachment_1394" align="alignnone" width="700"] problems with gem depedencies[/caption] As simple as that, thanks for reading Keep reading, coding and relax, peace H....