diff --git a/.gitignore b/.gitignore
index 9106b2a..4ea5798 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@
/pkg/
/spec/reports/
/tmp/
+Gemfile.lock
diff --git a/lib/validates_associated_with_context.rb b/lib/validates_associated_with_context.rb
index b71e749..4812240 100644
--- a/lib/validates_associated_with_context.rb
+++ b/lib/validates_associated_with_context.rb
@@ -1,6 +1,4 @@
# frozen_string_literal: true
require_relative "validates_associated_with_context/version"
-
-module ValidatesAssociatedWithContext
-end
+require_relative "validates_associated_with_context/associated_with_context"
diff --git a/lib/validates_associated_with_context/associated_with_context.rb b/lib/validates_associated_with_context/associated_with_context.rb
new file mode 100644
index 0000000..9d8c06d
--- /dev/null
+++ b/lib/validates_associated_with_context/associated_with_context.rb
@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+module ValidatesAssociatedWithContext
+ class AssociatedWithContextValidator < ActiveModel::EachValidator # :nodoc:
+ attr_reader :context, :inherit_context
+
+ def initialize(options)
+ @context = options.delete(:context)
+ @inherit_context = options.delete(:inherit_context)
+
+ super
+ end
+
+ def validate_each(record, attribute, value)
+ validation_context = inherit_context ? record.validation_context : context
+
+ if Array(value).reject { |r| valid_object?(r, validation_context) }.any?
+ record.errors.add(attribute, :invalid, **options.merge(value: value))
+ end
+ end
+
+ private
+ def valid_object?(record, validation_context)
+ (record.respond_to?(:marked_for_destruction?) && record.marked_for_destruction?) || record.valid?(validation_context)
+ end
+ end
+
+ module ClassMethods
+ # Validates whether the associated object or objects are all valid.
+ # Works with any kind of association.
+ #
+ # class Book < ActiveRecord::Base
+ # has_many :pages
+ # belongs_to :library
+ #
+ # validates_associated_with_context :pages, :library
+ # end
+ #
+ # WARNING: This validation must not be used on both ends of an association.
+ # Doing so will lead to a circular dependency and cause infinite recursion.
+ #
+ # NOTE: This validation will not fail if the association hasn't been
+ # assigned. If you want to ensure that the association is both present and
+ # guaranteed to be valid, you also need to use
+ # {validates_presence_of}[rdoc-ref:Validations::ClassMethods#validates_presence_of].
+ #
+ # Configuration options:
+ #
+ # * :context - The validation context to use.
+ # * :inherit_context - When true, the validation context
+ # is passed to the associated model.
+ # * :message - A custom error message (default is: "is invalid").
+ # * :on - Specifies the contexts where this validation is active.
+ # Runs in all validation contexts by default +nil+. You can pass a symbol
+ # or an array of symbols. (e.g. on: :create or
+ # on: :custom_validation_context or
+ # on: [:create, :custom_validation_context])
+ # * :if - Specifies a method, proc, or string to call to determine
+ # if the validation should occur (e.g. if: :allow_validation,
+ # or if: Proc.new { |user| user.signup_step > 2 }). The method,
+ # proc or string should return or evaluate to a +true+ or +false+ value.
+ # * :unless - Specifies a method, proc, or string to call to
+ # determine if the validation should not occur (e.g. unless: :skip_validation,
+ # or unless: Proc.new { |user| user.signup_step <= 2 }). The
+ # method, proc, or string should return or evaluate to a +true+ or +false+
+ # value.
+ def validates_associated_with_context(*attr_names)
+ validates_with ValidatesAssociatedWithContext::AssociatedWithContextValidator, _merge_attributes(attr_names)
+ end
+ end
+end
+
+ActiveRecord::Validations::ClassMethods.include ValidatesAssociatedWithContext::ClassMethods