How to deal with this decimal error for a price? - asp.net-core

Question

I'm working on this app that should show on "localhost/catalog" some data. I have a library for the models and for the services that the application might use. I am getting this error:
InvalidOperationException: The property 'Price' is not a navigation
property of entity type 'StoreAsset'. The 'Include(string)' method can
only be used with a '.' separated list of navigation property names.Microsoft.EntityFrameworkCore.Query.Internal.IncludeCompiler.WalkNavigations(IEntityType entityType, IReadOnlyList<string> navigationPropertyPaths, IncludeLoadTree includeLoadTree, bool shouldThrow)
Here is the code that I'm using (controller, models and view) and the service methods on bottom:
public class CatalogController : Controller
{
private IStoreAsset _assets;
public CatalogController(IStoreAsset assets)
{
_assets = assets;
}
public ActionResult Index()
{
var assetModels = _assets.GetAll();
var listingResult = assetModels
.Select(result => new AssetIndexListingModel
{
Id = result.Id,
Tipology = _assets.GetTipology(result.Id),
Size = _assets.GetSize(result.Id),
Price = decimal.Parse(_assets.GetPrice(result.Id))
});
var model = new AssetIndexModel()
{
Assets = listingResult
};
return View(model);
}
public class AssetIndexListingModel
{
public int Id { get; set; }
public string Size { get; set; }
public decimal Price { get; set; }
public string Tipology { get; set; }
public string ImageUrl { get; set; }
}
public abstract class StoreAsset
{
public int Id { get; set; }
[Required]
public Status Status { get; set; }
[Required]
public decimal Price { get; set; }
public string ImageUrl { get; set; }
}
public class Dress : StoreAsset
{
[Required]
public string Color { get; set; }
[Required]
public string Tipology { get; set; }
[Required]
public string Size { get; set; }
}
#model Models.Catalog.AssetIndexModel
<div id="assets">
<h3></h3>
<div id="assetsTable">
<table class="table table-condensed" id="catalogIndexTable">
<thead>
<tr>
<th>Size</th>
<th>Price</th>
<th>Tipology</th>
</tr>
</thead>
<tbody>
#foreach (var asset in Model.Assets)
{
<tr class="assetRow">
<td class="">
<a asp-controller="Catalog" asp-action="Detail" asp-route-id="#asset.Id">
<img src="#asset.ImageUrl" class="imageCell" />
</a>
</td>
<td class="">#asset.Price</td>
<td class="">#asset.Size</td>
<td class="">#asset.Tipology</td>
</tr>
}
</tbody>
</table>
</div>
public class StoreAssetService : IStoreAsset
{
private Context _context;
public StoreAssetService(Context context)
{
_context = context;
}
public void Add(StoreAsset newAsset)
{
_context.Add(newAsset);
_context.SaveChanges();
}
public IEnumerable<StoreAsset> GetAll()
{
return _context.StoreAssets
.Include(asset => asset.Status)
.Include(asset => asset.Price);
}
public StoreAsset GetById(int id)
{
// Return a query (same as returning GetAll().FirstOrDefault(...))
return _context.StoreAssets
.Include(assets => assets.Status)
.Include(assets => assets.Price)
// So it can return null with no problem
.FirstOrDefault(asset => asset.Id == id);
}
public StoreBranch GetCurrentLocation(int id)
{
throw new NotImplementedException();
}
// To implement and test
public string GetPrice(int id)
{
return _context.Dresses.FirstOrDefault(p => p.Id == id).Price.ToString();
}
public string GetSize(int id)
{
return _context.Dresses.FirstOrDefault(s => s.Id == id).Size;
}
public string GetStatus(int id)
{
throw new NotImplementedException();
}
public string GetTipology(int id)
{
var dress = _context.StoreAssets.OfType<Dress>()
.Where(b => b.Id == id);
// For now return other if it's not a party dress
return dress.Any() ? "Party" : "Other";
}
}
Should I use some ForeignKey attribute or change Price to a string?
Any help would be great thanks

Answer 1

As pointed out in the error message, the Include is for the Navigation property only.
You need to change below:
return _context.StoreAssets
.Include(asset => asset.Status)
.Include(asset => asset.Price);
To:
return _context.StoreAssets
.Include(asset => asset.Status).ToList();
Reference: https://learn.microsoft.com/en-us/ef/core/modeling/relationships#definition-of-terms
https://learn.microsoft.com/en-us/ef/core/querying/related-data

Answer 2

I am having yet another problem. When I go to "localhost/catalog" the page should display all columns/entries that I have in the database but it only displays one column. Is there something wrong in the foreach cicle?