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after_initialize and after_find Callbacks in Rails

At the time of normal operations in rails application, the objects are either updated, created or destroyed or we create our defined methods in the controller.  Rails provide us with some hooks in the object life cycle which we can invoke befor

Difference between File Repository and Database Repository in PDI

Kettle Database Repository: while using Database repository, all the information regarding jobs and transformation is stored in Database, which is the store of ETL metadata. You have to provide appropriate credential of database, and create a separa

Bind gridview in MVC

While display set of records we always use gridview   In MVC we also have gridview for displaying records or group in a formatted way   For doing that we can do it in a series of ways one way is to bind the view directly with the databa

What is Data Integrity Testing ?

What is Data Integrity Testing ? Data integrity acknowledges to the characteristics of information or record in the database and also directly to the users, by which users inspect quality of the data,integrity and stability. Data integrity testing v

Rails Testing with Cucumber

Rails Testing with Cucumber Hi Friends, In my previous blog Testing In Rails: Introduction and Creating Test Data, I had given you a brief idea about testing and later we talked about how we can test rails models and controllers. Here again I

Asp.net caching and stale page data

In this blog I'll explain the Asp.net caching overview and how to use caching in your asp.net projects. So lets start with few basic things:-- 1) What is caching? Caching is a technique of storing frequently used data in memory, so that, when the

Call Stored Procedure In Hibernate

Call Stored Procedure In Hibernate: Here is the simple answer of question 'How to call stored procedure in Hibernate?'.A stored procedure is a declarative SQL statements stored inside the database. A stored procedure can be invoked by triggers, using

How to use Constant & Readonly

Constant and ReadOnly is the C# keyword and use to hold a value for a life of a Program. As the Name implies we can not change the value of Constant and ReadOnly type variable. But there is some difference between them. Constant : Constants are decl

test test tes ttest estes

A wiki enables communities of editors and contributors to write documents collaboratively. All that people require to contribute is a computer, Internet access, a web browser, and a basic understanding of a simple markup language&

Display a random entry from a MySQL database in PHP

To display a random entry from a MySQL database we need to use a MySQL function rand(). To display the entry from MySQL database in PHP following script is used: <?php //connect to server with username and password, $connection = mysql_connect ("

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