Some Major Features that Differentiate RoR 4 from RoR 3
Changed Mass Assignment Mechanism
The
RoR 4 comes with completely revamped mass assignment mechanisms. The
mechanism can still be used to feed unfiltered params to the model by
putting into a gem. However, the hashes need to be generated by using
the require and permit methods on the param hash. The model will also
support the hashes generated in a new way. The change makes it easier
for programmers to separate model from the user interface. They can
simply state the attributes to be updated explicitly to eliminate mass
assignment security risk.
Turbolink
The
fourth release of Ruby on Rails generates normal HTTP links using
JavaScript. While serving the web page initially, it generates normal
links. But when a user clicks on a link, it deleted all markups and
updates the URL displayed in the address bar with the markup generated
from the HTTP reply. The feature makes it easier for developers to
increase the speed of their web applications. As the browser is not
required to check the changes in CSS and JavaScript files, no additional
requests are sent to the server. A single request from the browser can
generate and deliver the results more efficiently.
Default Thread Safety
By
default, RoR 4 is designed as a thread-safe development framework. So
the same Ruby process can now quickly process multiple requests on
threaded HTTP servers. However, the feature does not make all gems used
by the application thread-safe. Also, the application code cannot
maintain its states automatically. So the programmers need to ensure
that individual gems are thread safe to avoid problems when the
application code interacts with any global variables or class variables.
The feature must be used carefully to avoid data corruption and
application crashes.
Live Streaming
The
most recent version of Rails also supports live HTTP streaming. The
HTTP streaming feature can be used by web application developers to doll
out response to a user request over a time. So the user requests are
not required to be responded at once. During the streaming process, RoR
will simultaneously produce output, wait for new data generation, and
continue streaming new output after waiting for a specific amount of
time. The feature can be used by programmers to optimize the performance
of RoR applications that use streaming videos and media.
Improved Cookies Serialize
RoR
4.1 also serialized cookies in a completely different way to make the
web applications more secure and stable. Earlier, the objects placed
inside cookies Hash were being serialized and deserialized by RoR
programmers through Marshal.dump and Marshal.load. The method was prone
to the risk of remote code execution by attackers. The most recent
version of RoR comes with an improved JSON serializer that supports
simple JSON data types like string and integer. Thus, the complex
objects that can be used by attackers cannot be generated. The
programmers also have option to use a hybrid serializer to smoothly
convert their existing marshalled cookies into JSON cookies.
The
fourth release of Ruby on Rails intends to keep the primary codebase
lean by pushing several features of RoR 3 into separate gems. At the
same time, RoR 4 has evolved as a more modular web application
development framework with major changes in its internal architecture.
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