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# This is a monkey patch which must be removed when migrating to Rails 5.1 from 5.0.
#
# In Rails 5.0 there was introduced a bug which casts types in the uniqueness validator.
# https://github.com/rails/rails/pull/23523/commits/811a4fa8eb6ceea841e61e8ac05747ffb69595ae
#
# That causes to bugs like this:
#
# 1) API::Users POST /user/:id/gpg_keys/:key_id/revoke when authenticated revokes existing key
# Failure/Error: let(:gpg_key) { create(:gpg_key, user: user) }
#
# TypeError:
# can't cast Hash
# # ./spec/requests/api/users_spec.rb:7:in `block (2 levels) in <top (required)>'
# # ./spec/requests/api/users_spec.rb:908:in `block (4 levels) in <top (required)>'
# # ------------------
# # --- Caused by: ---
# # TypeError:
# # TypeError
# # ./spec/requests/api/users_spec.rb:7:in `block (2 levels) in <top (required)>'
#
# This bug was fixed in Rails 5.1 by https://github.com/rails/rails/pull/24745/commits/aa062318c451512035c10898a1af95943b1a3803
if Rails.gem_version >= Gem::Version.new("5.1")
raise "Remove this monkey patch: #{__FILE__}"
end
# Copy-paste from https://github.com/kamipo/rails/blob/aa062318c451512035c10898a1af95943b1a3803/activerecord/lib/active_record/validations/uniqueness.rb
# including local fixes to make Rubocop happy again.
module ActiveRecord
module Validations
class UniquenessValidator < ActiveModel::EachValidator # :nodoc:
def validate_each(record, attribute, value)
finder_class = find_finder_class_for(record)
table = finder_class.arel_table
value = map_enum_attribute(finder_class, attribute, value)
relation = build_relation(finder_class, table, attribute, value)
if record.persisted?
if finder_class.primary_key
relation = relation.where.not(finder_class.primary_key => record.id_was || record.id)
else
raise UnknownPrimaryKey.new(finder_class, "Can not validate uniqueness for persisted record without primary key.")
end
end
relation = scope_relation(record, table, relation)
relation = relation.merge(options[:conditions]) if options[:conditions]
if relation.exists?
error_options = options.except(:case_sensitive, :scope, :conditions)
error_options[:value] = value
record.errors.add(attribute, :taken, error_options)
end
rescue RangeError
end
protected
def build_relation(klass, table, attribute, value) #:nodoc:
if reflection = klass._reflect_on_association(attribute)
attribute = reflection.foreign_key
value = value.attributes[reflection.klass.primary_key] unless value.nil?
end
# the attribute may be an aliased attribute
if klass.attribute_alias?(attribute)
attribute = klass.attribute_alias(attribute)
end
attribute_name = attribute.to_s
column = klass.columns_hash[attribute_name]
cast_type = klass.type_for_attribute(attribute_name)
comparison =
if !options[:case_sensitive] && !value.nil?
# will use SQL LOWER function before comparison, unless it detects a case insensitive collation
klass.connection.case_insensitive_comparison(table, attribute, column, value)
else
klass.connection.case_sensitive_comparison(table, attribute, column, value)
end
if value.nil?
klass.unscoped.where(comparison)
else
bind = Relation::QueryAttribute.new(attribute_name, value, cast_type)
klass.unscoped.where(comparison, bind)
end
end
end
end
end
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