In a Web Application, we often need to grant different groups of users access to different resources. For example, in a Web Application used for Enterprise Resource Planning, the head of Human Resources will have access to all the employees’ sensitive data (such as person details, salary, etc.), whi...
In WebRatio it's possible to generate PDF, Excel or RTF reports. This article discusses a particular usage of the WebRatio generated reports. The goal is to create a report in order to use it as attachment for a newsletter (or to store it in the database). Suppose you want to send an email to all th...
The Math is an Utility Component designed to parse and evaluate mathematical expressions. A mathematical expression is composed by variables and operators and can be either statically defined at modeling time or dynamically provided through an input parameter at run-time. The Math replaces the varia...
When you are working on a new Web application, you will need to implement a set of common features. In the previous lessons you learned how to model these features in IFML, concentrating on the user interaction.
These features cover how to publish and maintain information, as well as the login ...
The Query Component is available starting from the WebRatio 5.1 version. It's a Utility Component that permits to execute a custom edited query using the HQL(Hibernate Query Language) or SQL query language. Moreover it can dynamically compose an HQL query depending on the incoming Domain Model ident...
In a Web application, you often need to manage information that is shown to the user. Managing the information means to create, update, or delete information. With WebRatio Platform you can easily model an administration section so that the Web Application user can manage the application data.
In t...
When you are working on a new Web application there is a set of common requirements that you are going to implement many times. In IFML lessons you learned how to model several commonly recurring requirements focused on the user interaction.
Recurring requirements comprehend how to publish and ma...
When you are working on a Web application you have to consider both the user interaction and the application behavior executed when the user triggers an action. The application behavior can be any kind of business logic you may need to express.
WebRatio Platform provides you with a set of componen...
The ability to show a list of elements and the details of each listed element is the one of the most common patterns in Web applications, and is called the Master and Details pattern.
In a previous lesson, you already learned how to model the basic Master and Details pattern.
This lesson shows y...
The Stored Procedure is an Operation that allows calling a procedure stored in a database.
To use this Component correctly, the procedure must be previously created in your database.
Discover how to use the Stored Procedure reading this article.
The UnsupportedClassVersionError can occurr in a Web Project that uses custom components, such as custom validation rules, servlets or listeners.
All these components are developed using a different project (e.g. a Java project) in which you have to compile the Java classes and create a jar file...
The Domain Model Utility Component is available starting from the WebRatio 5.1 version.
It's a hybrid unit, which means that it can be placed in every View (Site View, Module Definitions View, Service View).
It permits to retrieve information about entities and relationship of the Domain Model....
Usually, Web applications are not standalone; they need to integrate with external systems and other applications in the company intranet. The best way to make different Applications communicate with one another is to use a Web service infrastructure.
That’s why it is important to know how you can...
A job is a sequence of operations that has to be executed asynchronously by the application. It's possible to schedule a job at a specific time or interval, which means that jobs can be automatically triggered (scheduled when the application starts). It's also possible to schedule a job at runtime: ...
Data management is a crucial aspect for data-centric Web applications. So far, you have learned how to create, read, update and delete data through basic patterns. However, information often needs to be displayed and dealt with in different ways.
Displaying data through View Components is not the o...