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


This page contains a description of an example project that can be used to study different implementation techniques using VDF as a backend.


 
In this example the overall goal is to be able to see what users think about a particular item . As an added benefit - users can also share information about where to buy the particular items.
== Functionality ==
The overall goal is to be able to see what users think about a particular item.


To accomplish this, then users should be able to:
To accomplish this, then users should be able to:


*login
*login
*create a user account
*choose an item from a list
*choose an item from a list
*enter information about a known item
*enter information about a known item  
*supply a rating of an item
*supply information about the place where an item was bought.
 
*supply a review of an item
 
*Overview supplied reviews from other users
The system should be implemented  as a web application, showcasing the possibilities in the VDF AJAX library.
 
== Using the framework ==
 
 
The AJAX Rating example will build upon functionality allready present the following examples:
 
*AJAX Contact Management
*AJAX Order Entry
 
The overlapping functionality is described in:
 
*[[Using DataDictionaries]]
*[[Using the AJAX Library]]
*[[Using cAjaxSessionManager]]
*[[Creating a AJAX Web application]]
*[[Creating a AJAX Form]]
 
From here on I will describe functionality specific to this example
 
==Application design ==
 
=== 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:
The workspace is available here https://github.com/jacobandresen/ProductReview


*Item_DataDictionary
= [[DataDictionary|Data Dictionaries]] =
*Place_DataDictionary
We want to store information about users, places and known items. The other tables should hold sufficient information about the items and how the users liked them.
*Purchase_DataDictionary
*Rating_DataDictionary
*UserInfo_DataDictionary


=== Creating the webapp ===
The following data dictionaries  should now be available (Note that attributes like "UserId" in Token implies a index  on UserId on Token and a relation to the table "User")
==== Session management ====


==User==
*UserId (Numeric) 
*LoginName (Ascii)
*FirstName (Ascii)
*LastName (Ascii)
*Password (Ascii)
*EmailAddress (Ascii)
*Rights (Ascii)
*StreetAddress (Ascii)
*City (Ascii)
*ZIPCode (Ascii)
*Country (Ascii)


extending the following in cAjaxSessionManager:
==Token==
*UserId (Numeric)
*TokenValue (Ascii)
*LastAccessed (Date)


==Shop==
*ShopId (Numeric)
*Name (Ascii)
*Type (Numeric)
*Description (Ascii)
*StreetAddress (Ascii)
*City (Ascii)
*ZIPCode (Ascii)
*Country (Ascii)


*UserLogin: checking if the supplied password is correct
==Product==
*HasRights: does the logged in user have the rights to perform the chosen function?
*ProductId (Numeric)
*Name (Ascii)
*Type (Numeric)
*Description (Ascii)
*ShopId (Numeric)
*Price (Numeric)


==== Creating the Web Objects ====
==Review==
*ReviewId (Numeric)
*ItemId (Numeric)
*UserId (Numeric)
*Rating (Numeric)
*Comment (Ascii)


*item.wo : handling information about items
= Implementation =
*userinfo.wo : handling information about users
*place.wo: handling info about places


==== Creating the web markup ====
[[ProductReview VDF AJAX implementation]]


== Problems ==
[[Category: Web Applications]]
*[[AJAX Updating Related forms]]
[[Category: Data Dictionaries]]

Latest revision as of 14:14, 8 April 2020

Introduction

This page contains a description of an example project that can be used to study different implementation techniques using VDF as a backend.

In this example the overall goal is to be able to see what users think about a particular item . As an added benefit - users can also share information about where to buy the particular items.

To accomplish this, then users should be able to:

  • login
  • choose an item from a list
  • enter information about a known item
  • supply information about the place where an item was bought.
  • supply a review of an item
  • Overview supplied reviews from other users


The workspace is available here https://github.com/jacobandresen/ProductReview

Data Dictionaries

We want to store information about users, places and known items. The other tables should hold sufficient information about the items and how the users liked them.

The following data dictionaries should now be available (Note that attributes like "UserId" in Token implies a index on UserId on Token and a relation to the table "User")

User

  • UserId (Numeric)
  • LoginName (Ascii)
  • FirstName (Ascii)
  • LastName (Ascii)
  • Password (Ascii)
  • EmailAddress (Ascii)
  • Rights (Ascii)
  • StreetAddress (Ascii)
  • City (Ascii)
  • ZIPCode (Ascii)
  • Country (Ascii)

Token

  • UserId (Numeric)
  • TokenValue (Ascii)
  • LastAccessed (Date)

Shop

  • ShopId (Numeric)
  • Name (Ascii)
  • Type (Numeric)
  • Description (Ascii)
  • StreetAddress (Ascii)
  • City (Ascii)
  • ZIPCode (Ascii)
  • Country (Ascii)

Product

  • ProductId (Numeric)
  • Name (Ascii)
  • Type (Numeric)
  • Description (Ascii)
  • ShopId (Numeric)
  • Price (Numeric)

Review

  • ReviewId (Numeric)
  • ItemId (Numeric)
  • UserId (Numeric)
  • Rating (Numeric)
  • Comment (Ascii)

Implementation

ProductReview VDF AJAX implementation

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