diff --git a/.travis.yml b/.travis.yml
index 922916d..4e0ddc4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,7 @@ rvm:
 #  -  2.1.10
   -  2.2.6
   -  2.3.3
-#  -  2.4.0 # wait for json > 1.8.3
-  -  jruby-9.1.5.0
+  -  2.4.2
+  -  jruby-9.1.13.0
 script: "bundle exec rspec spec"
 
diff --git a/Gemfile b/Gemfile
index 7c2f977..9cead1a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,7 @@ source 'https://rubygems.org'
 gemspec
 
 gem 'jquery-rails'
+gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw]
 
 group :development, :test do
   gem 'better_errors'
diff --git a/app/views/tabulatr/_tabulatr_paginator.html.slim b/app/views/tabulatr/_tabulatr_paginator.html.slim
index 3ccc72c..6f430ab 100644
--- a/app/views/tabulatr/_tabulatr_paginator.html.slim
+++ b/app/views/tabulatr/_tabulatr_paginator.html.slim
@@ -19,6 +19,6 @@
 /  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 /  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-- if table_options[:paginate] == true || ((table_options[:paginate].is_a?(Fixnum)) && klass.count > table_options[:paginate])
+- if table_options[:paginate] == true || ((table_options[:paginate].is_a?(Integer)) && klass.count > table_options[:paginate])
     .pagination data-table=table_id
       ul.pagination data-table=table_id
diff --git a/lib/tabulatr/data/data.rb b/lib/tabulatr/data/data.rb
index 3794e21..9eedffc 100644
--- a/lib/tabulatr/data/data.rb
+++ b/lib/tabulatr/data/data.rb
@@ -29,7 +29,7 @@ def initialize(relation)
     @base       ||= relation.respond_to?(:klass) ? relation.klass : relation
     @table_name = @base.table_name
     @search     = self.class.instance_variable_get('@search')     || HashWithIndifferentAccess.new
-    @includes   = Set.new()
+    @includes   = Hash.new(Set.new())
     @cname      = @base.name.downcase
     @batch_actions = nil
     @row = self.class.instance_variable_get('@row')
@@ -89,7 +89,7 @@ def data_for_table(params, locals: {}, default_order: nil, controller: nil, &blo
   def execute_batch_actions batch_param, selected_ids
     if batch_param.present? && @batch_actions.present?
       batch_param = batch_param.keys.first.to_sym if batch_param.is_a?(Hash)
-      selected_ids = @relation.map(&:id) if selected_ids.empty?
+      selected_ids = @relation.pluck(:id) if selected_ids.empty?
       @batch_actions.yield(Invoker.new(batch_param, selected_ids))
     end
   end
@@ -123,22 +123,27 @@ def check_params(params)
 
   def join_required_tables(params)
     if params[:arguments].present?
-      tt = (params[:arguments].split(",").select{|s| s[':']}.map do |s|
-            s.split(':').first
-          end.uniq.map(&:to_sym))
-      tt.delete(@table_name.to_sym)
-      @includes = @includes + tt
+      tt = params[:arguments].split(",").select{|s| s[':']}.map do |s|
+            # assoc1-assoc12-assoc123:column3
+            a = s.split(':').first.split('-')
+            a.delete(@table_name.to_s)
+            a.map(&:to_sym) # [:assoc1, :assoc12, :assoc123]
+          end.uniq
+      @includes = tt.reject(&:empty?).inject(@includes) do |h1, arr|
+        h2 = arr.reverse.inject { |a, n| { n => a } }
+        if h2.is_a?(Hash)
+          h1.merge(h2) { |key, oldval, newval| [oldval, newval] }
+        else
+          h1.default << h2
+          h1
+        end
+      end
     end
     # @relation = @relation.includes(@includes.map(&:to_sym)).references(@includes.map(&:to_sym))
-    @relation = @relation.eager_load(@includes.map(&:to_sym))
+    @relation = @relation.eager_load(@includes, @includes.default.to_a)
     # @relation = @relation.group("#{@table_name}.#{@base.primary_key}")
   end
 
-  def table_name_for_association(assoc)
-    @base.reflect_on_association(assoc.to_sym).table_name
-    # assoc.to_sym
-  end
-
 end
 
 require_relative './dsl'
diff --git a/lib/tabulatr/data/dsl.rb b/lib/tabulatr/data/dsl.rb
index 8547c26..0249c10 100644
--- a/lib/tabulatr/data/dsl.rb
+++ b/lib/tabulatr/data/dsl.rb
@@ -47,17 +47,23 @@ def column(name, opts = {}, &block)
 
   def association(assoc, name, opts = {}, &block)
     @table_columns ||= []
-    assoc_klass = main_class.reflect_on_association(assoc.to_sym)
+    unless assoc.is_a?(Array)
+      assoc = assoc.to_s.split('-').map(&:to_sym)
+    end
+    assoc_klass = assoc.reduce(main_class) { |c,a| c.reflect_on_association(a.to_sym).try(:klass) }
     sql_options = determine_sql(opts, assoc_klass.try(:quoted_table_name), name)
     opts = {
         sort_sql: sql_options[:sort_sql],
         filter_sql: sql_options[:filter_sql]}.merge(opts)
     table_column = Tabulatr::Renderer::Association.from(
         name: name,
-        klass: assoc_klass.try(:klass),
+        klass: assoc_klass,
         col_options: Tabulatr::ParamsBuilder.new(opts),
-        table_name: assoc,
-        output: block_given? ? block : ->(record){a=record.send(assoc); a.try(:read_attribute, name) || a.try(name)})
+        table_name: assoc.join('-').to_sym,
+        output: block_given? ? block : lambda do |record|
+          a = assoc.reduce(record) {|cur,nxt| cur.try(:send, nxt)}
+          a.try(:read_attribute, name) || a.try(name)
+        end)
     @table_columns << table_column
   end
 
diff --git a/lib/tabulatr/data/filtering.rb b/lib/tabulatr/data/filtering.rb
index c3f1878..9abc163 100644
--- a/lib/tabulatr/data/filtering.rb
+++ b/lib/tabulatr/data/filtering.rb
@@ -43,7 +43,7 @@ def apply_search(query)
 
   def apply_filters(filter_params)
     return unless filter_params
-    filter_params.permit!.to_hash.with_indifferent_access.each do |param|
+    filter_params.each do |param|
       name, value = param
       next unless value.present?
 
diff --git a/lib/tabulatr/renderer/association.rb b/lib/tabulatr/renderer/association.rb
index 77a86c1..5b07bdb 100644
--- a/lib/tabulatr/renderer/association.rb
+++ b/lib/tabulatr/renderer/association.rb
@@ -39,7 +39,8 @@ def association?() true end
 
   def principal_value(record, view)
     return super if output || block
-    v = record.send(table_name)
+    assoc = table_name.to_s.split('-').map(&:to_sym)
+    v = assoc.reduce(record) { |cur,nxt| cur.try(:send, nxt) }
     if v && v.respond_to?(:to_a) && name != :count
       v.map(&:"#{name}")
     else
diff --git a/spec/dummy/app/models/vendor.rb b/spec/dummy/app/models/vendor.rb
index 1e562ad..c02725b 100644
--- a/spec/dummy/app/models/vendor.rb
+++ b/spec/dummy/app/models/vendor.rb
@@ -1,3 +1,4 @@
 class Vendor < ActiveRecord::Base
   has_many :products
+  belongs_to :parent
 end
diff --git a/spec/dummy/app/tabulatr_data/product_tabulatr_data.rb b/spec/dummy/app/tabulatr_data/product_tabulatr_data.rb
index 0a4f054..e361109 100644
--- a/spec/dummy/app/tabulatr_data/product_tabulatr_data.rb
+++ b/spec/dummy/app/tabulatr_data/product_tabulatr_data.rb
@@ -26,6 +26,7 @@ class ProductTabulatrData < Tabulatr::Data
   column :active, sortable: false
   column :updated_at, filter: :date do "#{record.updated_at.strftime('%H:%M %d.%m.%Y')}" end
   association :vendor, :name, filter: :exact
+  association %i[vendor parent], :name, filter: :exact, sortable: true, header: 'Parent'
   association :tags, :title do |r|
     "'#{r.tags.map(&:title).map(&:upcase).join(', ')}'"
   end
diff --git a/spec/dummy/db/migrate/20130730132101_create_vendors.rb b/spec/dummy/db/migrate/20130730132101_create_vendors.rb
index 7a315c6..c77b8bb 100644
--- a/spec/dummy/db/migrate/20130730132101_create_vendors.rb
+++ b/spec/dummy/db/migrate/20130730132101_create_vendors.rb
@@ -6,7 +6,7 @@ def change
       t.boolean :active
       t.text :description
 
-      t.timestamps
+      t.timestamps null: false
     end
   end
 end
diff --git a/spec/dummy/db/migrate/20130730132321_create_products.rb b/spec/dummy/db/migrate/20130730132321_create_products.rb
index 8aa06cf..d9a318a 100644
--- a/spec/dummy/db/migrate/20130730132321_create_products.rb
+++ b/spec/dummy/db/migrate/20130730132321_create_products.rb
@@ -6,7 +6,7 @@ def change
       t.decimal :price
       t.boolean :active
 
-      t.timestamps
+      t.timestamps null: false
     end
   end
 end
diff --git a/spec/dummy/db/migrate/20130730132348_create_tags.rb b/spec/dummy/db/migrate/20130730132348_create_tags.rb
index b6957a1..ca4bf2c 100644
--- a/spec/dummy/db/migrate/20130730132348_create_tags.rb
+++ b/spec/dummy/db/migrate/20130730132348_create_tags.rb
@@ -3,7 +3,7 @@ def change
     create_table :tags do |t|
       t.string :title
 
-      t.timestamps
+      t.timestamps null: false
     end
 
     create_table :products_tags, id: false do |t|
diff --git a/spec/dummy/db/schema.rb b/spec/dummy/db/schema.rb
index b225c36..4f5e40f 100644
--- a/spec/dummy/db/schema.rb
+++ b/spec/dummy/db/schema.rb
@@ -11,40 +11,51 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20141223164833) do
+ActiveRecord::Schema.define(version: 20180519000000) do
 
-  create_table "products", force: true do |t|
+  create_table "parents", force: :cascade do |t|
+    t.string   "name"
+    t.string   "url"
+    t.boolean  "active"
+    t.text     "description"
+    t.datetime "created_at",  null: false
+    t.datetime "updated_at",  null: false
+  end
+
+  create_table "products", force: :cascade do |t|
     t.integer  "vendor_id"
     t.string   "title"
     t.decimal  "price"
     t.boolean  "active"
-    t.datetime "created_at"
-    t.datetime "updated_at"
+    t.datetime "created_at",             null: false
+    t.datetime "updated_at",             null: false
     t.datetime "publish_at"
-    t.string   "type"
     t.integer  "status",     default: 0
   end
 
   add_index "products", ["vendor_id"], name: "index_products_on_vendor_id"
 
-  create_table "products_tags", id: false, force: true do |t|
+  create_table "products_tags", id: false, force: :cascade do |t|
     t.integer "tag_id"
     t.integer "product_id"
   end
 
-  create_table "tags", force: true do |t|
+  create_table "tags", force: :cascade do |t|
     t.string   "title"
-    t.datetime "created_at"
-    t.datetime "updated_at"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
   end
 
-  create_table "vendors", force: true do |t|
+  create_table "vendors", force: :cascade do |t|
     t.string   "name"
     t.string   "url"
     t.boolean  "active"
     t.text     "description"
-    t.datetime "created_at"
-    t.datetime "updated_at"
+    t.datetime "created_at",  null: false
+    t.datetime "updated_at",  null: false
+    t.integer  "parent_id"
   end
 
+  add_index "vendors", ["parent_id"], name: "index_vendors_on_parent_id"
+
 end
diff --git a/spec/features/tabulatrs_spec.rb b/spec/features/tabulatrs_spec.rb
index ddff822..26c6b26 100644
--- a/spec/features/tabulatrs_spec.rb
+++ b/spec/features/tabulatrs_spec.rb
@@ -12,8 +12,9 @@
   "officia", "deserunt", "mollit", "anim", "est", "laborum"]
 
   before(:each) do
-    @vendor1 = Vendor.create!(:name => "ven d'or", :active => true)
-    @vendor2 = Vendor.create!(:name => 'producer', :active => true)
+    @parent1 = Parent.create!(:name => "ABC", :active => true)
+    @vendor1 = Vendor.create!(:name => "ven d'or", :active => true, parent: @parent1)
+    @vendor2 = Vendor.create!(:name => 'producer', :active => true, parent: @parent1)
     @tag1 = Tag.create!(:title => 'foo')
     @tag2 = Tag.create!(:title => 'bar')
     @tag3 = Tag.create!(:title => 'fubar')
@@ -108,6 +109,7 @@
           Product.create!
         end
         visit one_item_per_page_with_pagination_products_path
+        wait_for_ajax
         pages = page.all('.pagination li a[data-page]').map{|a| a['data-page'].to_i}
         expect(pages).to match_array([1,2,3,10,20])
       end
diff --git a/spec/lib/tabulatr/data/data_spec.rb b/spec/lib/tabulatr/data/data_spec.rb
index 50a971f..a029068 100644
--- a/spec/lib/tabulatr/data/data_spec.rb
+++ b/spec/lib/tabulatr/data/data_spec.rb
@@ -17,7 +17,7 @@
   it 'prefilters the result' do
 
     td = Tabulatr::Data.new(Product.where(price: 10))
-    td.data_for_table(example_params)
+    td.data_for_table(ActionController::Parameters.new(example_params))
     expect(td.instance_variable_get('@relation').to_sql).to match(/.+WHERE \"products\".\"price\" = 10.+/)
   end
 
@@ -25,7 +25,7 @@
     Product.create([{title: 'foo', price: 5}, {title: 'bar', price: 10}, {title: 'fuzz', price: 7}])
 
     td = Tabulatr::Data.new(Product)
-    records = td.data_for_table(HashWithIndifferentAccess.new(example_params.merge(product_sort: 'title DESC')))
+    records = td.data_for_table(ActionController::Parameters.new(example_params.merge(product_sort: 'title DESC')))
     expect(records.count).to eql 3
     titles = ['fuzz', 'foo', 'bar']
     # raise records.inspect
@@ -43,7 +43,7 @@
         Product.where(id: ids).destroy_all
       end
     })
-    td.data_for_table(HashWithIndifferentAccess.new(example_params.merge(product_batch: 'delete', 'tabulatr_checked' => {'checked_ids' => ''})))
+    td.data_for_table(ActionController::Parameters.new(example_params.merge(product_batch: 'delete', 'tabulatr_checked' => {'checked_ids' => ''})))
     expect(Product.where(active: true).count).to be 0
     expect(Product.count).to be 1
   end
diff --git a/spec/lib/tabulatr/data/filtering_spec.rb b/spec/lib/tabulatr/data/filtering_spec.rb
index a4e8b31..2f25785 100644
--- a/spec/lib/tabulatr/data/filtering_spec.rb
+++ b/spec/lib/tabulatr/data/filtering_spec.rb
@@ -6,7 +6,6 @@ class DummyFilteringClass
 
     def table_columns; []; end
     def filters; []; end
-    def table_name_for_association(assoc); nil; end
   end
 
   describe '.apply_date_condition' do
@@ -29,7 +28,7 @@ def table_name_for_association(assoc); nil; end
     it "filters for 'today'" do
       fake_obj = double()
       allow(fake_obj).to receive_message_chain('col_options.filter_sql') { 'publish_at'}
-      @dummy.apply_date_condition(fake_obj, {simple: 'today'})
+      @dummy.apply_date_condition(fake_obj, {'simple'=>'today'})
       result = @dummy.instance_variable_get('@relation')
       expect(result.count).to be 1
       expect(result[0].id).to be @today.id
@@ -38,7 +37,7 @@ def table_name_for_association(assoc); nil; end
     it "filters for 'yesterday'" do
       fake_obj = double()
       allow(fake_obj).to receive_message_chain('col_options.filter_sql') { 'publish_at'}
-      @dummy.apply_date_condition(fake_obj, {simple: 'yesterday'})
+      @dummy.apply_date_condition(fake_obj, {'simple'=>'yesterday'})
       result = @dummy.instance_variable_get('@relation')
       expect(result.count).to be 1
       expect(result[0].id).to be @yesterday.id
@@ -47,7 +46,7 @@ def table_name_for_association(assoc); nil; end
     it "filters for 'this week'" do
       fake_obj = double()
       allow(fake_obj).to receive_message_chain('col_options.filter_sql') { 'publish_at'}
-      @dummy.apply_date_condition(fake_obj, {simple: 'this_week'})
+      @dummy.apply_date_condition(fake_obj, {'simple'=>'this_week'})
       result = @dummy.instance_variable_get('@relation')
       expect(result.count).to be 4
       expect(result.map(&:id).sort).to eq [@yesterday.id, @today.id, @week_one.id, @week_two.id].sort
@@ -56,7 +55,7 @@ def table_name_for_association(assoc); nil; end
     it "filters for 'last 7 days'" do
       fake_obj = double()
       allow(fake_obj).to receive_message_chain('col_options.filter_sql') { 'publish_at' }
-      @dummy.apply_date_condition(fake_obj, {simple: 'last_7_days'})
+      @dummy.apply_date_condition(fake_obj, {'simple'=>'last_7_days'})
       result = @dummy.instance_variable_get('@relation')
       expect(result.map(&:id).sort).to eq ([@last_seven_days.id, @yesterday.id, @today.id, @week_one.id].sort)
     end
@@ -64,7 +63,7 @@ def table_name_for_association(assoc); nil; end
     it "filters for 'this month'" do
       fake_obj = double()
       allow(fake_obj).to receive_message_chain('col_options.filter_sql') { 'publish_at'}
-      @dummy.apply_date_condition(fake_obj, {simple: 'this_month'})
+      @dummy.apply_date_condition(fake_obj, {'simple'=>'this_month'})
       result = @dummy.instance_variable_get('@relation')
       expect(result.map(&:id).sort).to eq ([@today.id, @week_two.id, @this_month.id])
     end
@@ -72,7 +71,7 @@ def table_name_for_association(assoc); nil; end
     it "filters for 'last 30 days'" do
       fake_obj = double()
       allow(fake_obj).to receive_message_chain('col_options.filter_sql') { 'publish_at'}
-      @dummy.apply_date_condition(fake_obj, {simple: 'last_30_days'})
+      @dummy.apply_date_condition(fake_obj, {'simple'=>'last_30_days'})
       result = @dummy.instance_variable_get('@relation')
       expect(result.map(&:id).sort).to eq ([
         @last_thirty_days.id, @yesterday.id, @last_seven_days.id, @today.id,
@@ -83,15 +82,15 @@ def table_name_for_association(assoc); nil; end
       fake_obj = double()
       allow(fake_obj).to receive_message_chain('col_options.filter_sql') { 'publish_at'}
       @dummy.apply_date_condition(fake_obj, {
-        simple: 'from_to', from: '31.12.2013 15:00',
-        to: '15.01.2014 00:00'})
+        'simple'=>'from_to', 'from'=>'31.12.2013 15:00',
+        'to'=>'15.01.2014 00:00'})
       result = @dummy.instance_variable_get('@relation')
       expect(result.map(&:id)).to eq ([@yesterday.id, @today.id, @week_two.id].sort)
     end
 
     it "exits early if condition is 'none'" do
       relation_before = @dummy.instance_variable_get('@relation')
-      @dummy.apply_date_condition(nil, {simple: 'none'})
+      @dummy.apply_date_condition(nil, {'simple'=>'none'})
       relation_after = @dummy.instance_variable_get('@relation')
       expect(relation_after).to eq relation_before
     end
@@ -133,7 +132,7 @@ def table_name_for_association(assoc); nil; end
 
     it 'can not be called without a block variable' do
       @dummy.instance_variable_set('@search', ->{'hi'})
-      expect{@dummy.apply_search('test')}.to raise_error
+      expect{@dummy.apply_search('test')}.to raise_error(RuntimeError)
     end
 
     it 'accepts an array of searchable columns' do
diff --git a/spec/lib/tabulatr/json_builder_spec.rb b/spec/lib/tabulatr/json_builder_spec.rb
index 7403b84..01c8e70 100644
--- a/spec/lib/tabulatr/json_builder_spec.rb
+++ b/spec/lib/tabulatr/json_builder_spec.rb
@@ -12,7 +12,7 @@
     it "complains when a non given attribute other than id is requested" do
       attribute = {action: :bar}
       data = {title: 'test', price: '7.0 EUR'}
-      expect{Tabulatr::JsonBuilder.insert_attribute_in_hash(attribute, data)}.to raise_error
+      expect{Tabulatr::JsonBuilder.insert_attribute_in_hash(attribute, data)}.to raise_error(Tabulatr::RequestDataNotIncludedError)
     end
 
     # it 'accepts arguments without table name' do
diff --git a/spec/lib/tabulatr/params_builder_spec.rb b/spec/lib/tabulatr/params_builder_spec.rb
index 6e7d2a6..576ed5c 100644
--- a/spec/lib/tabulatr/params_builder_spec.rb
+++ b/spec/lib/tabulatr/params_builder_spec.rb
@@ -14,6 +14,6 @@
 
   it 'does not accept a param which is in the DEPRECATED_PARAMS array' do
     stub_const('Tabulatr::ParamsBuilder::DEPRECATED_PARAMS', [:deprecated_param])
-    expect{Tabulatr::ParamsBuilder.new(deprecated_param: 'test')}.to raise_error
+    expect{Tabulatr::ParamsBuilder.new(deprecated_param: 'test')}.to raise_error(NoMethodError)
   end
 end
\ No newline at end of file
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index 3e39f47..541b0d8 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -13,6 +13,7 @@
 require 'spec_helper'
 
 Capybara.javascript_driver = :poltergeist
+Capybara.server = :webrick
 
 Capybara.register_driver :poltergeist do |app|
   Capybara::Poltergeist::Driver.new(app, {js_errors: true})
diff --git a/spec/support/wait_for_ajax.rb b/spec/support/wait_for_ajax.rb
index 1760f99..441fefb 100644
--- a/spec/support/wait_for_ajax.rb
+++ b/spec/support/wait_for_ajax.rb
@@ -1,7 +1,7 @@
 # from http://robots.thoughtbot.com/automatically-wait-for-ajax-with-capybara
 module WaitForAjax
   def wait_for_ajax
-    Timeout.timeout(Capybara.default_wait_time) do
+    Timeout.timeout(Capybara.default_max_wait_time) do
       loop until finished_all_ajax_requests?
     end
   end