Ruby on Rails for Everybody

Image Source: javaworld.com

Database connection pooling is already supported by Ruby on Rails 2.2! Basically, connection pooling occurs when several of the database connections are kept open and they are all ready for queries. And when Rails gets an HTTP request and queries the database, what it does is, it gets an open database connection from the several connections that are currently open. it then goes on with its query. After it has made its query, it automatically returns the connection to the pool. The connection pooling enables the user to have a better control over interaction in the database. And it boosts performance because Rails does not connect to the database every request. Without this feature, the surging search requests in the database can slow down the over all connection.

Image Source: images.devshed.com

If you want your site visitor to upload a certain file on your server, Rails make it an easy task to undertake the requirement. We will use the new application of Ruby on Rails called upload. We can create the basic structure of the application. And we will need simple Rails commands. Start off with C:\ruby>rails upload, then decide if you’re going to save the uploaded file. Create the directory and then check permissions. Next thing to do is to create the controller and models. You can call helper function content_type to know media type of the uploaded file. Next is to open a file in write mode so we will be using open helper function which is provided by File object. The render function is to be used to redirect to view files and to display message. The last is to create a view file uploadfile.rhtml. Set the parameter to True so that the action will pass on the data properly.

Though there is no preferred editor in the coding and editing of programs which is usually left to the programmer to decide. There are a couple of purpose built editors that can be used with RoR.

Emacs, has a quite simple configuration that accompanies its use and allows simultaneously displays changes as they are made hence it�s classification as a Display Editor. It also has a nifty help function the user can evoke by the simple press of the Ctrl-H keys. The Point feature allows the definition of the position of a character as they are entered onto the keyboard. The Echo Area Feature is a segment on the lower bottom of the screen editor that shows the amount of characters on the screen for various purposes should they be needed. The Mode Line is the last line on the screen which is signified by the starting and ending with dashes on the screen. Like all editors, Emacs has a menu bar where all the options available to the user can be found making use simpler instead of having to memorize special key combinations.