MVC The Good, The Bad and the Evil Hadi Hariri Developer & - - PowerPoint PPT Presentation

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MVC The Good, The Bad and the Evil Hadi Hariri Developer & - - PowerPoint PPT Presentation

Mar 28, 2024 865 likes •1.5k views

MVC The Good, The Bad and the Evil Hadi Hariri Developer & Technical Evangelist JetBrains http://hadihariri.com http://twitter.com/hhariri <inpu nput type pe=" ="hid hidden den" " name=" ="__VI

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MVC

The Good, The Bad and the Evil

Hadi Hariri Developer & Technical Evangelist JetBrains http://hadihariri.com http://twitter.com/hhariri

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Fallacy of Visual Productivity

2 4 6 8 10 12 5 10 15

Drag’n’Drop Features

Maintainability Factor

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Model View Controller

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Separation of Concerns…

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You’d think we learned…

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…one of many anti-patterns

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Single Responsibility Principle

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Write thy controllers so as tests shall not be needed

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Controller Responsibilities

  • Data conduit between View/Model
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Things to avoid

  • Everything that’s not data passing
  • Avoid repetitive tasks
  • Validations
  • Checks
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DRY up Controllers

  • Aspect Orientated Programming
  • Filters in MVC
  • Attribute
  • Filter Provider
  • Global Filters
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Filters

 Action 

OnActionExecuting OnActionExecuted OnResultExecuting OnResultExecuted

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DEMO

Unknown Record

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DEMO

Http Authentication

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Tight Coupling

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DEMO

IoC

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DEMO

Startup Tasks - Cleaning up Global.asax

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DEMO

Startup Tasks - Containers

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NuGet

  • Create isolated infrastructure packages
  • Pluggable and Discoverable via
  • IoC
  • MEF
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The Model

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Model Options

  • Domain Model
  • Dynamic Model
  • View Model
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Domain Model

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How to perform Partial Updates?

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Where to place Extra Data?

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Dynamic Model

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Dynamic Model

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View Model

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Benefits of View Model

  • Clear Intentions
  • Ability for Extra Data
  • Ability for Partial Updates
  • Scaffolding Support
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Downside of View Model

  • Extra Mapping
  • Somewhat unnecessary Class explosion
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When we map we DRY

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DEMO

AutoMapper

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DEMO

Conventions and Model Lookups

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Overall: Convention / Compromise

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Coping with Complex Sites

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DEMO

RenderAction – RenderPartial

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RESTifying your application

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ASP.NET MVC 4

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The “API” Controller

  • MVC for UI
  • Offers “REST” extensibility out of the box
  • Web API for API Controller
  • Offers “REST” features out of the box
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MVC 4 (not Web API)

  • Via extensibility
  • Content Negotiation
  • Caching
  • Routing
  • Hypermedia (not in Web API either)
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DEMO

EasyMVC: Conventions for routing and more

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Other things to watch out for

  • Better Validation
  • FluentValidation
  • Script Organization
  • Bundling in MVC 4
  • Async Controllers
  • Controllerless Actions
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Any framework / language can and will allow bad code

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Thank you!