About 153 questions
Nice how can i refactor following code using map
tag_clouds = {}
tag_cloud_names.each do |name|
tag_clouds[name] = row.field(row.index(name)).to
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Asked on 7 February 2018
I have a ruby Hash Object retrieved from the postgresql database.
hash = {"foo": bar}
puts hash.foo
=> NoMethodError: undefined method 'foo' for {"foo
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Asked on 7 February 2018
In JavaScript, Array.map alike methods are asynchronous. How about ruby's Array.map? How can we pass a callback block to the .map alike when it has do
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Asked on 7 February 2018
http://stackoverflow.com/questions/7788929/how-can-i-test-signed-or-permanent-cookies-with-rspec
Asked on 7 February 2018
/Users/Username/.rvm/gems/ruby-2.3.1/gems/puma-3.4.0/lib/puma/binder.rb:255:in `initialize': Address already in use - bind(2) for "0.0.0.0" port 3000
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Asked on 7 February 2018
After installing redis-rails gem, I get the error message "Redis is not a module" in server logs.
If you are using Rails 5, try
gem "redis-rails", gi
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Asked on 7 February 2018
While using a cache! block, I get the error message "Couldn't find template for digesting:"
Github issue #1: https://github.com/rails/rails/issues/149
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Asked on 7 February 2018
How do I set default order for rails model when I don't want to use .order when retrieving data?
You can do the following
class Book < ActiveRecord::
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Asked on 7 February 2018
How to generate a secret and secure token in Rails?
rake secret
Asked on 7 February 2018
You can use the OVER() clause in SQL. PostgreSQL has window functions counting rows before LIMIT is applied.
Example:
SELECT count(*) OVER() AS total_
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Asked on 7 February 2018
In sidekiq.yml, remove the following line:
:pidfile: tmp/pids/sidekiq.pid
Asked on 7 February 2018
begin
ActiveRecord::Base.transaction do
user.save! # will raise exception if error exists
end
rescue ActiveRecord::RecordInvalid => exceptio
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Asked on 7 February 2018
Normally, you can rescue a type of exceptions like this
begin
[] + ''
rescue TypeError => e
puts "oops: #{e.message}"
end
And, you can also catch
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Asked on 7 February 2018
You can use https://github.com/flyerhzm/bullet#run-in-tests and following the instructions under "Run in tests". Bullet gem will raise errors like
Bul
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Asked on 7 February 2018
How do you test rails controller's redirect_to in Rspec?
In Rspec,
get :authorize
expect(response).to redirect_to('/url/of/your/choice')
Asked on 7 February 2018
$ rails c
$ require 'sidekiq/api'
$ Sidekiq::RetrySet.new.size # Check the size of the queue by using the size method
$ Sidekiq::RetrySet.new.clear #
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Asked on 7 February 2018
You can get all enqueue_jobs from ActiveJob
ActiveJob::Base.queue_adapter.enqueued_jobs
The code above will return all the enqueue jobs, which retur
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Asked on 7 February 2018
How to write a script for making entries in rails.
You can add a task in the lib/tasks folder
For example lib/tasks/task_name.rake,
task :task_name
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Asked on 7 February 2018
You change change the index name to be shorter or equal to 63 characters
add_index :table_name, ["column_name_1", "column_name_2", "column_name_3", "c
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Asked on 7 February 2018
You can use
class ClassName < ApplicationRecord
validates :column_name, inclusion: { in: %w(restrict_text_1, restrict_text_2, restrict_text_3) }
e
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Asked on 7 February 2018
