use appraisals for testing with different versions of activerecord

Author: v.promzelev

Appraisals

@@ -0,0 +1,11 @@
+appraise 'ar50' do
+  gem 'activerecord', '~> 5.0'
+end
+
+appraise 'ar42' do
+  gem 'activerecord', '~> 4.2'
+end
+
+appraise 'ar32' do
+  gem 'activerecord', '~> 3.2'
+end

Gemfile

@@ -2,6 +2,3 @@ source 'https://rubygems.org'
 
 # Specify your gem's dependencies in activerecord-overflow_signalizer.gemspec
 gemspec
-
-gem 'byebug'
-gem 'pry'

activerecord-overflow_signalizer.gemspec

@@ -30,10 +30,13 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'activerecord', '~> 3.2'
+  # spec.add_runtime_dependency 'activerecord', '~> 3.2'
   spec.add_runtime_dependency 'pg'
 
   spec.add_development_dependency 'bundler', '~> 1.14'
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_development_dependency 'rspec', '~> 3.0'
+  spec.add_development_dependency 'appraisal', '~> 2.0'
+  spec.add_development_dependency 'byebug'
+  spec.add_development_dependency 'pry'
 end

gemfiles/ar32.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activerecord", "~> 3.2"
+
+gemspec :path => "../"

gemfiles/ar42.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activerecord", "~> 4.2"
+
+gemspec :path => "../"

gemfiles/ar50.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "activerecord", "~> 5.0"
+
+gemspec :path => "../"

lib/activerecord/overflow_signalizer.rb

@@ -22,7 +22,7 @@ def initialize(logger: nil, models: nil, days_count: 60)
     def analyse!
       @models.group_by(&:table_name).each do |table, models|
         model = models.first
-        pk = model.columns.select(&:primary).first
+        pk = model.columns.select { |c| c.name == model.primary_key }.first
         next if model.last.nil?
         if (max_value(pk.sql_type) - model.last.id) / avg(model) <= @days_count
           signalize(table, model.last.public_send(pk.name), max_value(pk.sql_type))