title: MVC3 - Model empty on post
body: <p>I have two models - category and article. I have pretty much the same delete views and controllers for both of them. The only difference is that it works for categories, but with articles I get empty model on HttpPost.</p>
  
  <p>Categories:</p>
  
  <pre><code>    public ActionResult DeleteCat(int id)
      {
          Category cat = db.CategoryByID(id);
          if (cat != null)
          {
              return View(cat);
          }
  
          return RedirectToAction("Index");
      }
  
      [HttpPost]
      public ActionResult DeleteCat(Category model)
      {
          db.DeleteCategory(model.CategoryID);
  
          return RedirectToAction("Index");
      }
  </code></pre>
  
  <p>Articles:</p>
  
  <pre><code>    public ActionResult Delete(int id)
      {
          Article art = db.ArticleByID(id);
          if (art != null)
          {
              return View(art);
          }
  
          return RedirectToAction("Index");
  
      }
  
      [HttpPost]
      public ActionResult Delete(Article model)
      {
          db.DeleteArticle(model.ArticleID);
  
          return RedirectToAction("Index");
      }
  </code></pre>
  
  <p>Both views are generated by Visual Studio and I haven't changed them. When I want to delete a category, everything goes well. But when I want to delete an article, it first gets selected properly from database, then the view is displayed (everything is OK) but when I click the delete button the model is empty (all properties are either 0, null or false) and so the db.DeleteArticle throws an exception (there's no article with ArticleID = 0). Could anyone please provide me with any hints as to what should I check or how should I work around this?</p>