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1. Implementing MVC Application in Ruby
on Rails with 5G Software
MVC ApplicationinRubyonRails
MVC isa patternforthe architecture of a software application.Itseparatesanapplicationintothe
followingcomponents:
1. Modelsfor handlingdataand businesslogic.
2. Viewsforhandlinggraphical userinterface objectsandpresentation
3. Controllersforhandlingthe userinterface andapplication
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MVC on Rails
Railspromote the conceptthat models,views,andcontrollersshouldbe keptseparate bystoringthe
code for eachelementasseparate filesinseparate directories.Thisseparationcontinueswithinthe
code that comprisesthe frameworkitself.The classesthatformthe core functionalityof Railsreside
withinthe followingmodules

2. ActiveRecord
ActiveRecordisthe module forhandlingbusinesslogicanddatabase communication.Itplaysthe role of
the model inour MVC architecture.Patternone thatthiscomponentimplementsinordertoperformits
role inthe MVC world.
ActionController
ActionControlleristhe componentthathandlesbrowserrequestsandfacilitatescommunication
betweenthe modelandthe view.Controllerswillinheritfromthisclass.Itformspart of the ActionPack
library.
ActionView
ActionViewisthe componentthathandlesthe presentationof pagesreturnedto the client.Views
inheritfromthisclass,whichisalsopart of the ActionPacklibrary.
Database Abstraction
ActiveRecordshipswithdatabaseadapterstoconnecttoSQLite,MySQL, andPostgreSQL.A large
numberof adaptersare available forotherpopulardatabase serverpackages,suchasOracle,MongoDB,
and MicrosoftSQL Server,viaRubyGems.
Database abstractionisa wayof codingan applicationsothatitisn’tdependentuponanyone’s
database.A code that’sspecifictoa particulardatabase serverishiddensafelyinActiveRecordand
invokedasneeded.The resultisthata Railsapplicationisnotboundtoany specificdatabase server
software shouldyouneedtochange the underlyingdatabase serverata latertime,nochangesto your
applicationcode are required.
Database Tables
Tablesare the containerswithinarelationaldatabase thatstore ourdata ina structuredmanner,and
they’re made upof rows andcolumns.The rows mapto individual objects,andthe columnsmaptothe
attributesof those objects.The collectionof all the tablesinadatabase,andthe relationshipsbetween
those tables,iscalledthe database schema
The ActionPackLibrary
ActionPackisthe name of the librarythatcontainsthe view andcontrollerpartsof the MVC
architecture.Unlike the ActiveRecordmodule,thesemodulesare more intuitivelynamed.
ActionControllerandActionView.ActionController(the Controller)
The controllerhandlesthe applicationlogicof the program, actingas the glue betweenthe application’s
data, the presentationlayer,andthe webbrowser.Inthisrole,acontrollerperformsanumberof tasks

3. including
Decidinghowtohandle a particularrequest(forexample,whethertorenderafull page or justone part
of it) Retrievingdatafromthe model tobe passedtothe view Gatheringinformationfromabrowser
requestandusingitto create or update datain the model
ActionView(the View)
One of the principlesof MVCisthat a view shouldcontainpresentationlogiconly.Thisprinciple holds
that the code in a viewshouldonlyperformactionsthatrelate todisplayingpagesinthe application;
none of the code ina viewshouldperformanycomplicatedapplicationlogic,norstore orretrieve any
data fromthe database.InRails,everythingthatissent tothe webbrowserishandledbyaview
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CloudSoftware for 5G, 5G Software, CloudSoftware for 5G & 5G CloudNative Software Provider.