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Thursday 18 April 2019

Populate Oracle JET table on top of Oracle ADF BC using REST Web Service

 Previously I have posted about creating REST Web Service from ADF Application Module and in this post, I am going to use the same REST service for populating data in a JET table. Here we'll populate JET table on top of Oracle ADF BC (Business Components).

Here I am taking the same sample application that I have discussed in my first post Getting started with Oracle JET and JDeveloper

The URL of ADF BC based web service is and it returns a list of Departments in nested JSON format

Let’s see the implementation part

Add an oj-table component in the dashboard.html page and define the required number of columns, this web service returns a list of Departments so I have taken 4 columns for Department Id, Department Name, Manager Id, and Location Id

  1. <div class="oj-hybrid-padding">
  2. <h1>Dashboard Content Area</h1>
  3. <div id="div1">
  4. <oj-table id='table' aria-label='Departments Table'
  5. data='[[datasource]]'
  6. selection-mode='{"row": "multiple", "column": "multiple"}'
  7. dnd='{"reorder": {"columns": "enabled"}}'
  8. scroll-policy='loadMoreOnScroll'
  9. scroll-policy-options='{"fetchSize": 10}'
  10. columns='[{"headerText": "Department Id",
  11. "field": "dept_id",
  12. "resizable": "enabled"},
  13. {"headerText": "Department Name",
  14. "field": "dept_name",
  15. "resizable": "enabled"},
  16. {"headerText": "Manager Id",
  17. "field": "mgr_id",
  18. "resizable": "enabled"},
  19. {"headerText": "Location Id",
  20. "field": "loc_id",
  21. "resizable": "enabled"}
  22. ]'
  23. style='width: 100%; height: 400px;'>
  24. </oj-table>
  25. </div>
  26. </div>

Now see the code of dashboard.js, Read comments to understand the javascript code, Here getJSON() method of jQuery is used to call REST Web Service as jQuery is a part of Oracle JET libraries.

  1. /*
  2. * Your dashboard ViewModel code goes here
  3. */
  4. define(['ojs/ojcore', 'knockout', 'jquery', 'ojs/ojinputtext', 'ojs/ojtable', 'ojs/ojarraytabledatasource'],
  5. function (oj, ko, $) {
  6. function DashboardViewModel() {
  7. var self = this;
  8. //Define a Knockout observable array and name it tabData
  9. self.tabData = ko.observableArray();
  10. //Use jQuery method to call REST Web Service
  11. $.getJSON("").
  12. then(function (departments) {
  13. //JSON response is nested that's why 'items' is used to access records
  14. $.each(departments.items, function () {
  15. //Push data in Observable array
  16. self.tabData.push( {
  17. dept_id : this.DepartmentId,
  18. dept_name : this.DepartmentName,
  19. mgr_id : this.ManagerId,
  20. loc_id : this.LocationId
  21. });
  22. });
  23. });
  24. //Pass observable array in utility class to show data in table
  25. self.datasource = new oj.ArrayTableDataSource(self.tabData,
  26. {
  27. idAttribute : 'dept_id'
  28. });
  29. .
  30. .
  31. .

tabData is a knockout observable array that is defined to hold returned value and you can see that
self.tabData.push is used to push web service data into this array and at last a JET utility class
ArrayTableDataSource is used to convert this observable array into tabular format data.

Now run the application and you can see that a JET table is populated with Departments data

Cheers 🙂 Happy Learning

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