Is orthogonal data supported with this gem?

[gs2589]

In my data table I have the following column definition:

columns:[
       {data: "supplier",
             render: function(data, type, row){
              return data ? data.name : null
             }
]

In my SearchResultDatatable#data method I have

def data
    records.map do |record|
      {
        supplier: {name: record.supplier.try(:name)},

      }
end

This is not working - I get the datatables.net/tn/4 error because

{name: record.supplier.try(:name)}

gets serialized as a string not an object- so data.name returns undefined.

Any thoughts on how to fix this?

[n-rodriguez]

Add this in your JS:

data = JSON.parse(data);

[gs2589]

Thanks n-rodriguez. I tried your suggestion, but got this error:

Uncaught SyntaxError: Unexpected token # in JSON at position 0 at JSON.parse () at eval (eval at format (purchases:12), :1:6) at format (purchases:265) at HTMLTableCellElement. (purchases:355) at HTMLTableSectionElement.dispatch (jquery.self-bd7ddd393353a8d2480a622e80342adf488fb6006d667e8b42e4c0073393abee.js?body=1:5227) at HTMLTableSectionElement.elemData.handle (jquery.self-bd7ddd393353a8d2480a622e80342adf488fb6006d667e8b42e4c0073393abee.js?body=1:4879)

It looks like the issue arises because of the #sanitize method

def sanitize(data)
      data.map do |record|
        if record.is_a?(Array)
          record.map { |td| ERB::Util.html_escape(td) }
        else
          record.update(record){ |_, v| ERB::Util.html_escape(v) }
        end
      end
    end

Is there a way to go around this? Is it a bad idea to bypass this method? Is there a way to get standard serialization into json?

[gs2589]

Ok, Im making some progress:

Here is some new code:

def data
    records.map do |record|
      {id: record.id,
       scan_timestamp: raw({data:record.effective_date.in_time_zone('Eastern Time (US & Canada)').strftime("%I:%M%p %Z %d-%b-%y"), display:"hello"}.to_json)
end

then in js, I can do data = JSON.parse(row.scan_timestamp) and that converts it into an object. Im wondering if there is a way to format the data in Datatable#data to ensure that the js datatables automatically turns orthogonal data into nested objects?

Thanks!

[MrMoins]

I'm also trying to use orthogonal data but can't figure how to do with this gem.

[MrMoins]

I'm trying to modify sanitize method like this, it return a json object correctly formatted but now I've some issue on JS side.

def sanitize(data)
  data.map do |record|
    if record.is_a?(Hash)
      record
    elsif record.is_a?(Array)
      record.map { |td| ERB::Util.html_escape(td) }
    else
      record.update(record){ |_, v| ERB::Util.html_escape(v) }
    end
  end
end

[gs2589]

@n-rodriguez Any thoughts on this? I'd love to figure out a 'standard' way to do this with this gem and add it to the readme. Orthogonal data is pretty core to datatables, so I think many users would benefit. I'd be happy to write up the guide for the readme, at this moment, I've not been able to get this to work.

[n-rodriguez]

Hi! It could be supported. Nowadays the data is assumed to be html content so it's html escaped to avoid XSS attacks. What you want is json all the way so :

Override the sanitize method in your datatable :

  def data
    records.map do |record|
      {
        id:    record.id,
        title: { title: record.title }
      }
    end
  end

  private

    def sanitize(data)
      data.map do |record|
        if record.is_a?(Array)
          record.map { |td| ERB::Util.html_escape(td) }
        elsif record.is_a?(Hash)
          if options[:json_content]
            record
          else
            record.update(record) { |_, v| ERB::Util.html_escape(v) }
          end
        end
      end
    end

and in the controller :

  def index
    respond_to do |format|
      format.html
      format.json { render json: PostDatatable.new(params, json_content: true) }
    end
  end

And in Coffee/JS :

$ ->
  $('#posts-datatable').dataTable
    processing: true
    serverSide: true
    ajax: $('#posts-datatable').data('source')
    pagingType: 'full_numbers'
    columns: [
      { data: 'id' }
      {
        data: 'title',
        render: (data, type, row)->
          console.log(data)
          if data?
            data.title
          else
            ''
      }
    ]

[n-rodriguez]

BTW I would use https://github.com/jbox-web/ajax-datatables-rails#using-view-decorators to avoid this kind of lengty methods :

# before
def data
  records.map do |record|
    {
      id: record.id,
      scan_timestamp: raw({ data: record.effective_date.in_time_zone('Eastern Time (US & Canada)').strftime("%I:%M%p %Z %d-%b-%y"), display:"hello" }.to_json
    }
  end
end

# after
def data
  records.map do |record|
    {
      id: record.id,
      scan_timestamp: { data: record.decorate.effective_date, display: 'hello' }
    }
  end
end

[n-rodriguez]

Added in the README : https://github.com/jbox-web/ajax-datatables-rails#tutorial

[calaway]

I'm trying to specify a data-sort (or data-order) tag on a column and can't quite get it working from these instructions. Can you help me see what I've done wrong?

  def data
    records.map do |record|
      {
        id: record.id,
        build_number: { display: record.build_number, sort_by: record.build_number.to_i },
      }
    end
  end

$(document).ready(function(){
  $('#builds-datatable').DataTable({
    // ...
    columns: [
      { data: "id"},
      { data: "build_number",
        render: {
          _: 'display',
          sort: 'sort_by',
       }
      }
    ]
  });
});

display is showing correctly, but I can't get it to add the data-sort attribute. I know both display and sort_by are coming through to the client side correctly, since I can access both of them.

I have added json_content: true to the controller and copied the sanitize method into the datatable class.

Any help you can offer is greatly appreciated. Thank you for creating and maintaining such a useful gem!