public IActionResult Create(PostViewModel model)
{
PostViewModel viewModel = null;
try
{
if(!ModelState.IsValid)
throw new Exception("The Post model is not valid!");
var entityEntry = _libraryContext.Posts.Add(model.Post);
if (_libraryContext.SaveChanges() == 0)
{
throw new Exception("The Post model could not be saved!");
}
var post = entityEntry.Entity;
if(model.SelectedCategoryIds != null && model.SelectedCategoryIds.Count() > 0)
{
var postsCategories = new List<PostCategory>();
foreach(var categoryId in model.SelectedCategoryIds)
{
postsCategories.Add(new PostCategory{
PostId = post.Id,
CategoryId = categoryId
});
}
post.Categories = postsCategories;
_libraryContext.Posts.Attach(post);
_libraryContext.Entry(post).State = EntityState.Modified;
if (_libraryContext.SaveChanges() == 0)
{
throw new Exception("The Post model could not be saved!");
}
}
return RedirectToAction("Index");
}
catch(Exception ex)
{
ModelState.AddModelError(string.Empty, "Unable to save changes.");
var filteredCategories = _libraryContext.Categories.Where(f => f.ParentCategory != null).Include(c => c.ParentCategory).AsEnumerable();
viewModel = new PostViewModel
{
Post = model.Post,
Libraries = _libraryContext.Libraries.AsEnumerable(),
SelectedCategoryIds = model.SelectedCategoryIds,
Categories = new MultiSelectList(filteredCategories, "Id", "Name", model.SelectedCategoryIds, "ParentCategory.Name")
};
}
return View(viewModel);
}
public IActionResult Create()
{
var filteredCategories = _libraryContext.Categories.Where(f => f.ParentCategory != null).Include(c => c.ParentCategory).AsEnumerable();
var model = new PostViewModel
{
Post = new Post(),
Libraries = _libraryContext.Libraries.AsEnumerable() ,
Categories = new MultiSelectList(filteredCategories, "Id", "Name", null, "ParentCategory.Name")
};
return View(model);
}
public IActionResult Edit(PostViewModel model)
{
PostViewModel viewModel = null;
try
{
if(!ModelState.IsValid)
throw new Exception("The Post model is not valid!");
var originalModel = _libraryContext.Posts.Include(p => p.Categories).FirstOrDefault(m => m.Id == model.Post.Id);
if(originalModel == null)
throw new Exception("The existing Post: " + model.Post.Title + " doesn't exists anymore!");
originalModel.Title = model.Post.Title;
originalModel.Synopsis = model.Post.Synopsis;
originalModel.Description = model.Post.Description;
originalModel.Body = model.Post.Body;
originalModel.LibraryId = model.Post.LibraryId;
if(originalModel.Categories != null)
{
originalModel.Categories.Clear();
}
else
{
originalModel.Categories = new List<PostCategory>();
}
var entityEntry = _libraryContext.Posts.Attach(originalModel);
_libraryContext.Entry(originalModel).State = EntityState.Modified;
if (_libraryContext.SaveChanges() == 0)
{
throw new Exception("The Post model could not be saved!");
}
if(model.SelectedCategoryIds != null && model.SelectedCategoryIds.Count() > 0)
{
foreach(var categoryId in model.SelectedCategoryIds)
{
originalModel.Categories.Add(new PostCategory{
PostId = originalModel.Id,
CategoryId = categoryId
});
}
}
_libraryContext.Posts.Attach(originalModel);
_libraryContext.Entry(originalModel).State = EntityState.Modified;
if (_libraryContext.SaveChanges() == 0)
{
throw new Exception("The Post model could not be saved!");
}
return RedirectToAction("Index");
}
catch(Exception ex)
{
ModelState.AddModelError(string.Empty, "Unable to save changes.");
var filteredCategories = _libraryContext.Categories.Where(f => f.ParentCategory != null).Include(c => c.ParentCategory).AsEnumerable();
viewModel = new PostViewModel
{
Post = model.Post,
Libraries = _libraryContext.Libraries.AsEnumerable(),
SelectedCategoryIds = model.SelectedCategoryIds,
Categories = new MultiSelectList(filteredCategories, "Id", "Name", model.SelectedCategoryIds, "ParentCategory.Name")
};
}
return View(viewModel);
}
public IActionResult Edit(Int32? id)
{
if (id == null)
{
return new HttpStatusCodeResult(400);
}
var model = _libraryContext.Posts.Include(c => c.Categories).FirstOrDefault(m => m.Id == id);
if(model == null)
{
return RedirectToAction("Index");
}
Int16[] ids = null;
if(model.Categories != null && model.Categories.Count > 0){
ids = new Int16[model.Categories.Count];
int i = 0;
foreach (var postCategory in model.Categories)
{
ids[i] = postCategory.CategoryId;
i++;
}
}
var filteredCategories = _libraryContext.Categories.Where(f => f.ParentCategory != null).Include(c => c.ParentCategory).AsEnumerable();
var viewModel = new PostViewModel
{
Post = model,
Libraries = _libraryContext.Libraries.AsEnumerable(),
SelectedCategoryIds = ids,
Categories = new MultiSelectList(filteredCategories, "Id", "Name", ids, "ParentCategory.Name")
};
return View(viewModel);
}