fix issue with method_defined?

method_defined? method doesn't work with ActiveRecord

Gemfile

@@ -5,6 +5,9 @@ source "https://rubygems.org"
 # gem "activemodel", "4.2.10"
 # gem "activemodel", "5.2.1"
 # gem "activemodel", "6.0.0"
+# gem "activerecord", "6.0.0"
+# gem "json"
+# gem "sqlite3", "~> 1.4.2"
 
 # Specify your gem's dependencies in attr_filters.gemspec
 gemspec

gemfiles/rails_6.0.0.gemfile

@@ -3,5 +3,8 @@
 source "https://rubygems.org"
 
 gem "activemodel", "6.0.0"
+gem "activerecord", "6.0.0"
+gem "json"
+gem "sqlite3", "~> 1.4.2"
 
 gemspec path: "../"

lib/attr_filters/filters_macro.rb

@@ -29,10 +29,16 @@ def register_filters(filters, attrs)
       def check_attributes!(attrs)
         attrs.each do |attr|
           setter = "#{attr}="
-          unknown_attribute!(setter) unless method_defined?(setter)
+          unknown_attribute!(setter) unless writer_exists?(setter)
         end
       end
 
+      def writer_exists?(setter)
+        return attribute_method?(setter) if respond_to?(:attribute_method?)
+
+        method_defined?(setter)
+      end
+
       def check_filters!(filters)
         filters.each do |filter|
           unknown_filter!(filter) unless AttrFilters::Filters::LIST.key?(filter)

spec/attr_filters/active_record_spec.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+RSpec.describe "ActiveRecord integration using AttrFilters::ActiveModel", if: active_record? do
+  context "attributes lazy loading" do
+    it "should success add filter to an attribute" do
+      ActiveRecord::Base.establish_connection(
+        adapter: "sqlite3",
+        database: ":memory:"
+      )
+      ActiveRecord::Base.connection.execute(%(CREATE TABLE IF NOT EXISTS users (name TEXT, age INT);))
+      class User < ActiveRecord::Base
+        include AttrFilters::ActiveModel
+
+        filters :name, trim: true
+      end
+
+      user = User.new(name: "  Mike Dou")
+      user.valid?
+
+      expect(user.name).to eq("Mike Dou")
+    end
+  end
+end

spec/spec_helper.rb

@@ -6,6 +6,11 @@
 require_relative "./support/utils"
 require_relative "./support/active_model/name" if active_model?
 
+if active_record?
+  require "sqlite3"
+  require "active_record"
+end
+
 RSpec.configure do |config|
   config.example_status_persistence_file_path = ".rspec_status"
 

spec/support/utils.rb

@@ -3,3 +3,7 @@
 def active_model?
   AttrFilters::Utils.satisfied_spec?("activemodel")
 end
+
+def active_record?
+  AttrFilters::Utils.satisfied_spec?("activerecord")
+end