I'm making a new web app using Rails, and was wondering, what's the difference between string and text? And when should each be used?
Ruby-on-rails – Difference between string and text in rails
ruby-on-rails
Related Solutions
JRuby is the Ruby implementation that runs on a JVM whereas Matz's Ruby is a C implementation.
Key features to note are:
- JRuby runs on Java VM's and it's either compiled or interpreted down to Java byte code.
- JRuby can integrate with Java code. If you have Java class libraries (.jar's), you can reference and use them from within Ruby code with JRuby. In the other direction you can also call JRuby code from within Java. JRuby can also use the JVM and application server capabilities.
- JRuby is usually hosted within Java application servers such as Sun's GlassFish or even the Tomcat web server.
- Although you cannot use native Ruby gems with JRuby there are JRuby implementations for most of the popular Ruby libraries.
There are other differences which are listed at the JRuby wiki:
In Rails 3, Application specific custom configuration data can be placed in the application configuration object. The configuration can be assigned in the initialization files or the environment files -- say for a given application MyApp:
MyApp::Application.config.custom_config_variable = :my_config_setting
or
Rails.configuration.custom_config_variable = :my_config_setting
To read the setting, simply call the configuration variable without setting it:
Rails.configuration.custom_config_variable
=> :my_config_setting
UPDATE Rails 4
In Rails 4 there a new way for this => http://guides.rubyonrails.org/configuring.html#custom-configuration
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Best Answer
The difference relies in how the symbol is converted into its respective column type in query language.
Reference:
When should each be used?
As a general rule of thumb, use
:stringfor short text input (username, email, password, titles, etc.) and use:textfor longer expected input such as descriptions, comment content, etc.