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POWhere do you put your validation in asp.net mvc 3?
 

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  1. POWhere do you put your validation in asp.net mvc 3?
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    <p>One common recommended practice in asp.net mvc is that <a href="http://lostechies.com/jimmybogard/2009/06/30/how-we-do-mvc-view-models/" rel="nofollow noreferrer">you should not send your business models to your views</a>.. instead you should create viewmodels specific to each view.</p> <p>When that is done and you call the ModelState.IsValid method in your controller you are effectively checking the validity of the viewmodel but not the business object.</p> <p>What is the conventional approach to dealing with this?</p> <pre><code>public class Person { public int ID {get; set;}; [Required] public string Name {get; set;} [Required] public string LastName {get; set;} public virtual ICollection&lt;Exam&gt; Exams {get; set;} } public class PersonFormViewModel { public int ID {get; set;}; [Required] public string Name {get; set;} [Required] public string LastName {get; set;} } </code></pre> <p>This is exactly what I have right now but Im not sure if the [Required] attribute should appear on both models or just the ViewModel or just the Business Model.</p> <p>Any tips on this issue are appreciatedd.</p> <p>More links to support my claim that it is a common good practice to always use view models.</p> <p><a href="https://stackoverflow.com/questions/5128303/how-to-add-validation-to-my-pocotemplate-classes">How to add validation to my POCO(template) classes</a></p> <p><a href="http://blogs.msdn.com/b/simonince/archive/2010/01/26/view-models-in-asp-net-mvc.aspx" rel="nofollow noreferrer">http://blogs.msdn.com/b/simonince/archive/2010/01/26/view-models-in-asp-net-mvc.aspx</a></p>
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    1. COWhat is your "business model" exactly?
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      1. USStephen Swensen
    2. COPerson is a class that is tracked by EntityFramework. PersonViewModel is obviously not.. read the blog post I linked to and you will understand the practices Im trying to follow.. hence the question of where should the validation logic go.
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    3. COThanks - sorry, I scanned the article and searched for "business model" within it but no hits.
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