Databl is a javascript datatable interface for Ruby on Rails apps.

Steps to use:

1- Add your custom datatable ruby class 2- Define an instance method named datable_rows where you will query and process your data rows 3- Initialize a databl object with the params helper and if necessary some session specific data. 3- Use the tablize method to fetch and format your data rows

If you need to sort your data there are two methods provided to you that you can call in your datable_rows method:

• sort_column gives you the index number of the table header to sort by
• sort_direction ASC or DESC, sent when table header is clicked to sort

If you need the query term:

• query returns the query term if a user provides it via the search box

You can also define a mapping between the header indices and sql fragment as a macro using column_names that takes a hash with keys as the header index and values as the sql fragments

ColumnNames = {
      1 => 'products.production_date',
      2 => 'products.supplier',
      3 => 'products.brand',
      default: 'products.name'
  }

column_names ColumnNames

• sort_column_name is the method that gives you the sql fragment depending on which header is selected to sort by

If you need to pass session or db related data to fetch records, you can provide them to the when initializing a databl object in a hash passed in as the second argument:

• session_opts is the method to access session related data

Add this line to your application's Gemfile:

gem 'databl'

And then execute:

$ bundle

Or install it yourself as:

$ gem install databl

class ProductsDatatable < Databl::Base
  ColumnNames = {
        1 => 'products.production_date',
        2 => 'products.supplier',
        3 => 'products.brand',
        default: 'products.name'
    }
  
  column_names ColumnNames

  def databl_rows
    account = Account.find(session_opts[:account_id])
    if query.present?
      if sort_column > 0
        Product.search_by_account_with_query(account, query, sort_column_name, sort_direction)
      else
        Product.search_by_account_with_query(account, query)
      end
    else
      if sort_column > 0
        Product.search_by_account(account, sort_column_name, sort_direction)
      else
        Product.search_by_account(account)
      end
    end
  end
end

Lastly, you can create a template similar to products/example_action.databl and use the records fetched above like the following:

ProductsDatatable.new(params, account_id: current_user.account_id).datablize do |row|
  [
    '<i class="fa fa-tag"></i>',
    link_to(product.name, product),
    product.brand
  ]
end

You can pass in a block to datablize as seen here to format your results. Any further metadata like for example totals calculated for columns to be presented can be provided in a hash as an argument to datablize:

ProductsDatatable.new(params, account_id: current_user.account_id).datablize(total_number_of_products: 100, total_number_of_brands: 35)

Bug reports and pull requests are welcome on GitHub at https://github.com/rendekarf/databl.

The gem is available as open source under the terms of the MIT License.