Summary

lib/generators/datatables/USAGE Description: Creates the datatables structure for you. Example: rails generate datatables init This will create: app/services/datatables app/services/datatables/application_datatable.rb rails generate datatables users This will create: app/services/datatables app/services/datatables/application_datatable.rb app/services/datatables/users_datatable.rb

lib/generators/datatables/datatables_generators.rb class DatatablesGenerator < Rails::Generators::Base source_root File.expand_path('../templates', __FILE__) argument :model, type: :string class_option :doc, type: :boolean, default: true, desc: "Include documentation." def generate_init generate_application_datatable end def generate_model generate_model_datatable unless model == 'init' end private def generate_application_datatable copy_file 'datatable_template.template', 'app/services/datatables/application_datatable.rb' end def generate_model_datatable template 'model_datatable_template.template', "app/services/datatables/#{model.underscore}_datatable.rb" end end

lib/generators/datatables/templates/datatable_template.template class ApplicationDatatable # delegate :params, to: :@view # delegate :link_to, to: :@view def initialize(view) @view = view end def as_json(options = {}) { recordsTotal: count, recordsFiltered: total_entries, data: data } end private def page params[:start].to_i/per_page + 1 end def per_page length > 0 ? length : 10 end def sort_column columns[params[:order]['0'][:column].to_i] end def sort_direction params[:order]['0'][:dir] == "desc" ? "desc" : "asc" end def length params[:length].to_i end end

lib/generators/datatables/templates/model_datatable_template.template class <%= model.camelcase %>Datatable < ApplicationDatatable delegate :edit_<%= model.singularize.downcase %>_path, to: :@view private <%- if options.doc? -%> # Loop through memoized collection and build the columns. # If extracting from a view, be sure to add delegates # and to also clean up and inject each column into the column var. # Also, if you have multiple items (links) in a single column, you # will need to create a separate variable and join them accordingly # when pushing to the column array <%- end -%> def data <%= model.downcase.pluralize %>.map do |<%= model.downcase.singularize.underscore %>| [].tap do |column| column << nil # something end end end <%- if options.doc? -%> # Returns the count of records. <%- end -%> def count <%= model.singularize.camelcase %>.count end def total_entries <%= model.downcase.underscore %>.total_count # will_paginate # <%= model.downcase.underscore %>.total_entries end def <%= model.downcase.underscore %> @<%= model.downcase.underscore %> ||= fetch_<%= model.downcase.underscore %> end def fetch_<%= model.downcase.underscore %> search_string = [] columns.each do |term| search_string << "#{term} like :search" end # will_paginate # <%= model.downcase.underscore %> = <%= model.singularize.camelcase %>.page(page).per_page(per_page) <%= model.downcase.underscore %> = <%= model.singularize.camelcase %>.order("#{sort_column} #{sort_direction}") <%= model.downcase.underscore %> = <%= model.downcase.underscore %>.page(page).per(per_page) <%= model.downcase.underscore %> = <%= model.downcase.underscore %>.where(search_string.join(' or '), search: "%#{params[:search][:value]}%") end <%- if options.doc? -%> # The columns needs to be the same list of searchable items and IN ORDER that they will appear in Data. <%- end -%> def columns %w() end end



