Add `test-ransack-scope-and-column-same-name.rb`

This file is located at https://gist.github.com/jonatack/5df41a0edb53b7bad989
Co-authored-by: jonatack <jonnyatack@gmail.com>

bug_report_templates/test-ransacker-arel-present-predicate.rb

@@ -0,0 +1,72 @@
+# test-ransacker-arel-present-predicate.rb
+
+# Run it in your console with: `ruby test-ransacker-arel-present-predicate.rb`
+
+# If you change the gem dependencies, run it with:
+# `rm gemfile* && ruby test-ransacker-arel-present-predicate.rb`
+
+unless File.exist?('Gemfile')
+  File.write('Gemfile', <<-GEMFILE)
+    source 'https://rubygems.org'
+
+    # Rails master
+    gem 'rails', github: 'rails/rails'
+
+    # Rails last release
+    # gem 'rails'
+
+    gem 'sqlite3'
+    gem 'ransack', github: 'activerecord-hackery/ransack'
+    gem 'polyamorous', github: 'activerecord-hackery/polyamorous'
+  GEMFILE
+
+  system 'bundle install'
+end
+
+require 'bundler'
+Bundler.setup(:default)
+
+require 'active_record'
+require 'minitest/autorun'
+require 'logger'
+require 'ransack'
+
+# This connection will do for database-independent bug reports.
+ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
+ActiveRecord::Base.logger = Logger.new(STDOUT)
+
+# Display versions.
+message = "Running test case with Ruby #{RUBY_VERSION}, Active Record #{
+  ::ActiveRecord::VERSION::STRING}, Arel #{Arel::VERSION} and #{
+  ::ActiveRecord::Base.connection.adapter_name}"
+line = '=' * message.length
+puts line, message, line
+
+ActiveRecord::Schema.define do
+  create_table :projects, force: true do |t|
+    t.string :name
+    t.string :number
+  end
+end
+
+class Project < ActiveRecord::Base
+  ransacker :name do
+    Arel.sql('projects.name')
+  end
+
+  ransacker :number do |parent|
+    parent.table[:number]
+  end
+end
+
+class BugTest < Minitest::Test
+  def test_ransackers
+    sql = Project.ransack({number_present: 1}).result.to_sql
+    puts sql
+    assert_equal "SELECT \"projects\".* FROM \"projects\" WHERE (\"projects\".\"number\" IS NOT NULL AND \"projects\".\"number\" != '')", sql
+
+    sql = Project.ransack({name_present: 1}).result.to_sql
+    puts sql
+    assert_equal "SELECT \"projects\".* FROM \"projects\" WHERE (projects.name IS NOT NULL AND projects.name != '')", sql
+  end
+end