Moves paginator settings to Configuration object

Author: antillas21

lib/ajax-datatables-rails/base.rb

@@ -9,6 +9,7 @@ class MethodNotImplementedError < StandardError; end
     def initialize(view, options = {})
       @view = view
       @options = options
+      load_paginator
     end
 
     def config
@@ -197,5 +198,16 @@ def generate_sortable_displayed_columns
       @sortable_displayed_columns
     end
 
+    def load_paginator
+      case config.paginator
+      when :kaminari
+        extend Extensions::Kaminari
+      when :will_paginate
+        extend Extensions::WillPaginate
+      else
+        extend Extensions::SimplePaginator
+      end
+      self
+    end
   end
 end

lib/ajax-datatables-rails/config.rb

@@ -20,5 +20,6 @@ class Configuration
 
     # default db_adapter is pg (postgresql)
     config_accessor(:db_adapter) { :pg }
+    config_accessor(:paginator) { :simple_paginator }
   end
 end

lib/generators/datatable/templates/ajax_datatables_rails_config.rb

@@ -1,4 +1,7 @@
 AjaxDatatablesRails.configure do |config|
   # available options for db_adapter are: :pg, :mysql2, :sqlite3
   # config.db_adapter = :pg
+
+  # available options for paginator are: :simple_paginator, :kaminari, :will_paginate
+  # config.paginator = :simple_paginator
 end

lib/generators/rails/templates/datatable.rb

@@ -1,9 +1,4 @@
 class <%= @datatable_name %>Datatable < AjaxDatatablesRails::Base
-  # uncomment the appropriate paginator module,
-  # depending on gems available in your project.
-  # include AjaxDatatablesRails::Extensions::Kaminari
-  # include AjaxDatatablesRails::Extensions::WillPaginate
-  # include AjaxDatatablesRails::Extensions::SimplePaginator
 
   def sortable_columns
     # Declare strings in this format: ModelName.column_name

spec/ajax-datatables-rails/ajax_datatables_rails_spec.rb

@@ -198,17 +198,18 @@ class FooDatatable < AjaxDatatablesRails::Base
     let(:results) { double('Collection', :offset => [], :limit => []) }
     let(:view) { double('view', :params => params) }
     let(:datatable) { AjaxDatatablesRails::Base.new(view) }
+    let(:records) { double('Array').as_null_object }
 
     before(:each) do
       allow(datatable).to receive(:sortable_columns) { ['User.foo', 'User.bar'] }
       allow(datatable).to receive(:sortable_displayed_columns) { ["0", "1"] }
     end
 
     describe '#paginate_records' do
-      it 'raises a MethodNotImplementedError' do
-        expect { datatable.send(:paginate_records, []) }.to raise_error(
-          AjaxDatatablesRails::Base::MethodNotImplementedError
-        )
+      it 'defaults to Extensions::SimplePaginator#paginate_records' do
+        allow(records).to receive_message_chain(:offset, :limit)
+
+        expect { datatable.send(:paginate_records, records) }.not_to raise_error
       end
     end
 

spec/ajax-datatables-rails/kaminari_spec.rb

@@ -1,10 +1,13 @@
 require 'spec_helper'
 
 class KaminariDatatable < AjaxDatatablesRails::Base
-  include AjaxDatatablesRails::Extensions::Kaminari
 end
 
 describe KaminariDatatable do
+  before(:each) do
+    allow_any_instance_of(AjaxDatatablesRails::Configuration).to receive(:paginator) { :kaminari }
+  end
+
   describe '#paginate_records' do
     let(:users_database) do
       double('User',
@@ -29,4 +32,4 @@ class KaminariDatatable < AjaxDatatablesRails::Base
       datatable.send(:paginate_records, records) 
     end
   end
-end
+end

spec/ajax-datatables-rails/will_paginate_spec.rb

@@ -1,10 +1,13 @@
 require 'spec_helper'
 
 class WillPaginateDatatable < AjaxDatatablesRails::Base
-  include AjaxDatatablesRails::Extensions::WillPaginate
 end
 
 describe WillPaginateDatatable do
+  before(:each) do
+    allow_any_instance_of(AjaxDatatablesRails::Configuration).to receive(:paginator) { :will_paginate }
+  end
+
   describe '#paginate_records' do
     let(:users_database) do
       double('User',
@@ -22,4 +25,4 @@ class WillPaginateDatatable < AjaxDatatablesRails::Base
       datatable.send(:paginate_records, records)
     end
   end
-end
+end