Get flash to fully experience Pearltrees
I absolutely loves Rails 2.0 and the command line conveniences it provides for the RESTful scaffolding and models. Here’s a couple of tricks to generate a migration to quickly to add/remove columns from an existing table. Assume you already have a table called ‘Users’.
Checkboxes are one of those things that look easy and should be easy, but they aren't always easy. I needed a solution that could create a checkbox list of languages that a user speaks. So I don't forget here's how to do it: The migrations are important. You have to be sure to exclude the id parameter when you create languages_users or you will get ' Mysql::Error: #23000Duplicate entry' due to the fact that ActiveRecord will try to store a value in the id field that indicates which model created the entry (User.languages << vs Langauges.users).
I was playing around with layouts in Rails the other day… I know, clearly I have too much time on my hands. But anyway, I found that you can fake a nested layout scheme in Rails by delegating view rendering to partials. As an added bonus, you don’t need to hack around with any of Rails’ internals to make it work. For example, let’s say I’m working on an application that has both a public layout and an admin layout. The public layout consists of tabs and a sidebar.
Pagination is extremely important in any web application. Let’s say a client has a database with 10,000 cars for sale. You, the intrepid web developer, are hired to build a web front end to the database.
My previous post compared MySQL and ferret full text search engines. For our project, the ferret was the winner. Nevertheless, I will try to show the beauty and simplicity of using MySQL indexes. Create table and indices First of all it is necessary to create table and the corresponding index. CREATE TABLE articles ( id integer NOT NULL PRIMARY KEY AUTO_INCREMENT , title varchar ( 20 ) , body varchar ( 100 ) , fulltext ( title, body ) ) engine = MyISAM;<BR>
This Guide is based on Rails 3.0. Some of the code shown here will not work in earlier versions of Rails. 1 Command Line Basics There are a few commands that are absolutely critical to your everyday usage of Rails. In the order of how much you’ll probably use them are:
Rapid Rails is a series of articles containing succinct tips to increase your productivity when working with Ruby on Rails . This is the first part, and shows you how to make the most of the command–line tools that come with Rails. Quickly generate migrations
While working on a CRM system in Ruby on Rails 2.2 I needed to find a way to email one of the users a weekly report. The report would be generated from the PDF templates already integrated with the front-end using the RTex plug-in for Rails . The solution was to include the following in an ActionMailer model to render the view away from the controller and attach the result to an email.
25 Jul Just got Archie Smuts comment asking how to populate a Open Flash Chart graph using results from a database . Just for reference, the code that follows represents this graph: <br /><object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" width="600" height="300" id="chart_1217004188.58145" align="middle"><param name="allowScriptAccess" value="sameDomain" /><param name="movie" value="/projects/open-flash-chart.swf?data=%2Fprojects%2Fopen_flash_chart2%2Fusing_database" /><param name="quality" value="high" /><param name="bgcolor" value="#FFFFFF" /><embed src="/projects/open-flash-chart.swf?
About:- Using open flash chart you can represent your data in the form of different type of graphs. Install Files:-
1 Why Associations? Why do we need associations between models? Because they make common operations simpler and easier in your code. For example, consider a simple Rails application that includes a model for customers and a model for orders.