ProductReview Example

Here I will build a example application using the VDF Ajax library and note the steps taken underway.

Functionality

To have an example VDF AJAX application to share assessments about known items .

To accomplish this, then users should be able to:

• login
• create a user account
• choose an item from a list
• enter information about a known item
• supply a rating of an item

The overall goal is to be able to see what users think about a particular item.

The system should be implemented as a web application, showcasing the possibilities in the VDF AJAX library.

Application design

First you should familiarize yourself with these:

• Using DataDictionaries
• Using the AJAX Library
• Creating a AJAX Web application
• Creating a AJAX Form

Table layout

We want to store information about users, places, purchases and known items. A user should be either a normal user or an administrator. The other tables should hold sufficient information about the items purchased and how the users liked them.

Create these tables in the database builder and create the associated data dictionaries.

The following data dictionaries should now be available:

• Item_DataDictionary
• Place_DataDictionary
• Purchase_DataDictionary
• Rating_DataDictionary
• UserInfo_DataDictionary

Creating the webapp

Session management

users logging in

• choose create new
• select "Web Object"
• select "AJAX Session Manager"
• Write "SessionManager" as Object name

Creating the Web Objects

create web objects for all data dictionaries.

Problems

• AJAX Updating Related forms