rubocop fixes

Author: kbrock

activerecord-virtual_attributes.gemspec

@@ -1,4 +1,4 @@
-lib = File.expand_path("../lib", __FILE__)
+lib = File.expand_path("lib", __dir__)
 $LOAD_PATH.push(lib) unless $LOAD_PATH.include?(lib)
 
 require "active_record/virtual_attributes/version"
@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
-  spec.files = Dir.chdir(File.expand_path('..', __FILE__)) do
+  spec.files = Dir.chdir(File.expand_path(__dir__)) do
     `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features|bin)/}) || f.match(/^(\.)|renovate.json/) }
   end
 

lib/active_record/virtual_attributes/rspec/have_virtual_attribute.rb

@@ -1,7 +1,7 @@
 RSpec::Matchers.define(:have_virtual_attribute) do |name, type|
   match do |klass|
-    expect(klass.has_attribute?(name)).to be_truthy
-    expect(klass.virtual_attribute?(name)).to be_truthy
+    expect(klass.has_attribute?(name)).to(be_truthy)
+    expect(klass.virtual_attribute?(name)).to(be_truthy)
     expect(klass.type_for_attribute(name.to_s).type).to(eq(type)) if type
     klass.instance_methods.include?(name.to_sym)
   end

lib/active_record/virtual_attributes/virtual_delegates.rb

@@ -105,7 +105,7 @@ def determine_method_names(column, to, prefix) # rubocop:disable Naming/MethodPa
           end
 
           method_prefix = "#{prefix == true ? to : prefix}_" if prefix
-          method_name = "#{method_prefix}#{method_name}".to_sym
+          method_name = :"#{method_prefix}#{method_name}"
 
           [method_name, to.to_sym, column]
         end

lib/active_record/virtual_attributes/virtual_fields.rb

@@ -6,6 +6,7 @@ module VirtualFields
       include ActiveRecord::VirtualAttributes::VirtualReflections
 
       # rubocop:disable Style/SingleLineMethods
+      # rubocop:disable Naming/PredicateMethod
       module NonARModels
         def dangerous_attribute_method?(_); false; end
 
@@ -15,6 +16,7 @@ def add_autosave_association_callbacks(*_args); self; end
 
         def belongs_to_required_by_default; false; end
       end
+      # rubocop:enable Naming/PredicateMethod
       # rubocop:enable Style/SingleLineMethods
 
       included do

lib/active_record/virtual_attributes/virtual_total.rb

@@ -116,4 +116,4 @@ def virtual_aggregate_arel(reflection, method_name, column)
   end
 end
 
-ActiveRecord::Base.include VirtualAttributes::VirtualTotal
+ActiveSupport.on_load(:active_record) { include VirtualAttributes::VirtualTotal }