CSC/ECE 517 Fall 2016/E1650. Sort instructor views alphabetically by default

Purpose

The purpose of this topic is to sort the Instructor views on the basis of Reviewer's Last Name (by default). Current Model:

• Currently Instructor can view the Reports in non-decreasing sorted value of 'Average Overall Volume' for the Reviewer.

Our Business Model

We plan to change the view as per below:

• Instructor will be able to view the Reports according to the Reviewer's Last Name.
• Instructor will be able to view either in non-decreasing or non-increasing order without refreshing the page.
• To implement this, we plan to use TableSorter.

Implementation

Introduction to TableSorter

Implementation of sorting algorithm for Instructor views using 'TableSorter'. TableSorter is a jQuery plugin for turning a standard HTML table with table-head and table-body tags into a sortable table without rendering fresh. TableSorter can parse and sort many data types linked with the table column.

Requirements

To integrate the table sorter into any view two things are needed:

i) Include a gem in Gemfile

gem 'jquery-tablesorter'

ii) Including jQuery-tablesorter in app/assets/javascripts/application.js

//= require jquery-tablesorter

This loads only the core-widgets. It will neither include the extracted widgets nor any files from the addons and extras directories.

Sorting on Reviewer's Name

• Added in _review_report.html.erb

<script>
 $(function () {
    $("[data-toggle='tooltip']").tooltip();
    $("#myTable").tablesorter({
      sortList: [[0,0]],
      headers: {
        4: {
        sorter: 'customParser'
      }
    }
    });
  })
</script>

Sorting on Metric's Avg. Vol

• Added in _review_report.html.erb

<script>
  $.tablesorter.addParser({
    id: "customParser",
    is: function (stringValue) {
      return false;
    },
    format: function (stringValue) {
      var stringNumericPart = stringValue.split(" ");
      var numericValue = parseInt(stringNumericPart[2],10);
      return numericValue ;
    },
    type: 'numeric'
  });
</script>

Testing

As we are working on view, so we have given the style for the table. By this we can test its performance over any browser.

• Added in _review_report.html.erb

<style>
  th.tablesorter-headerAsc{
    background-image: url(<%= asset_path("up-arrow.png") %>);
    background-size: 15px 15px;
    background-repeat: no-repeat;
    background-position: center right;
    padding-right: 15px;
  }

  th.tablesorter-headerDesc{
    background-image: url(<%= asset_path("down-arrow.png") %>);
    background-size: 15px 15px;
    background-repeat: no-repeat;
    background-position: center right;
    padding-right: 15px;
  }

  th.sorter-true.tablesorter-headerUnSorted{
    background-image: url(<%= asset_path("sort.png") %>);
    background-size: 15px 7px;
    background-repeat: no-repeat;
    background-position: center right;
    padding-right: 15px;

  }

</style>

Test Results

Below is the screenshot for the above given style:

References

1. [1]