Strong Params bugs

strong_params_bugs.rb

# Strong params tries to require all the files they depend on.
# This way you can require strong params itself, without having the entire world loaded
`gem which action_controller/metal/strong_parameters | xargs ruby -ne 'print if /^require/'`
# => "require \"active_support/core_ext/hash/indifferent_access\"\n" +
#    "require \"active_support/core_ext/hash/transform_values\"\n" +
#    "require \"active_support/core_ext/array/wrap\"\n" +
#    "require \"active_support/core_ext/string/filters\"\n" +
#    "require \"active_support/core_ext/object/to_query\"\n" +
#    "require \"active_support/rescuable\"\n" +
#    "require \"action_dispatch/http/upload\"\n" +
#    "require \"rack/test\"\n" +
#    "require \"stringio\"\n" +
#    "require \"set\"\n" +
#    "require \"yaml\"\n"


# However, they missed at least 2 files. We see the first one when we try to require it:
# they forgot to require the file that defines cattr_accessor
require 'action_controller/metal/strong_parameters' rescue $!.message        # => "undefined method `cattr_accessor' for ActionController::Parameters:Class\nDid you mean?  attr_accessor"

# Okay then, we'll do that ourselves
require 'active_support/core_ext/module/attribute_accessors'                 # => true

# Now we can require strong params
require 'action_controller/metal/strong_parameters'                          # => true

# Now we see the second one:
# they forgot to require the file that defines #present?
ActionController::Parameters.new(a: {b: 'c'}).require(:a) rescue $!.message  # => "undefined method `present?' for <ActionController::Parameters {\"b\"=>\"c\"} permitted: false>:ActionController::Parameters"

# Okay then, we'll do that ourselves
require 'active_support/core_ext/object/blank'                               # => true

# Now we can use the ActionController::Parameters#require
ActionController::Parameters.new(a: {b: 'c'}).require(:a)                    # => <ActionController::Parameters {"b"=>"c"} permitted: false>

# There might be others as well, these are the only 2 I found during my exploration