Ruby: How do I use active support date in vanilla ruby?

Question

I'm writing a Ruby script that involves date comparisons.

To keep it readable, I'd like to do things like 1.day.ago. I thought it would be as easy as adding gem 'activesupport' to my gemfile and requiring require 'active_support'. But that doesn't work.

I've gone further:

require "active_support/core_ext/date/calculations"
require "active_support/core_ext/integer/time"
require "active_support/core_ext/time"

But I'm not quite there:

1.day.ago
#NameError: uninitialized constant ActiveSupport::IsolatedExecutionState
#
#      ::ActiveSupport::IsolatedExecutionState[:time_zone] || zone_default

…I'm not sure what else I need to require. How do I use all of active record's date/time methods in my vanilla ruby script?

Answer 1

You just need to include ActiveSupport::IsolatedExecutionState e.g.

# This is not needed because active_support/core_ext/integer/time already requires it
#   require "active_support/core_ext/date/calculations" 
# This is not really needed either as almost all of it will 
# be required by the requirements in active_support/core_ext/integer/time  
#   require "active_support/core_ext/time" 
require "active_support/core_ext/integer/time"
require "active_support/isolated_execution_state.rb"

1.day.ago
#=> 2023-02-20 19:18:49.686473704 +0000

Why this is not required in "active_support/core_ext/time/zones", I can't say as I feel like it should be to avoid this issue.

If you really want to include all of activesupport you were very close however the actual require statement is require 'active_support/all' The contents of this file are simply:

require "active_support"
require "active_support/time"
require "active_support/core_ext"