I'm trying to perform a query without having created a model that maps it.
Consider this snippet
public IDictionary<string, int> GetParentelaMapping()
{
using (var conn = dataContextFactory.Create())
{
var result = conn.Query<dynamic>("SELECT ID_GRADO_PARENTELA,GRADO_PARENTELA FROM GRADO_PARENTELA")
.ToDictionary(
row => (string)row.GRADO_PARENTELA,
row => (int)row.ID_GRADO_PARENTELA, StringComparer.OrdinalIgnoreCase);
return result;
}
}
It gaves me an exception that
Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: ''int' does not contain a definition for 'GRADO_PARENTELA''
How can I handle such a case?
Thanks
Unfortunately this feature currently is not supported. Track new issue #1591 for that.
As a workaround i suggest to define additional class for reading such result:
class ParentelaMapping
{
public int ID_GRADO_PARENTELA { get; set; }
pulbic string GRADO_PARENTELA { get; set; }
}
public IDictionary<string, int> GetParentelaMapping()
{
using (var conn = dataContextFactory.Create())
{
var result = conn.Query<ParentelaMapping>("SELECT ID_GRADO_PARENTELA,GRADO_PARENTELA FROM GRADO_PARENTELA")
.ToDictionary(
row => row.GRADO_PARENTELA,
row => row.ID_GRADO_PARENTELA, StringComparer.OrdinalIgnoreCase);
return result;
}
}
P.S.
linq2db designed to work better with linq queries so consider to rewrite your query in the following way:
[Table("GRADO_PARENTELA")]
class GrandoParentela
{
public int ID_GRADO_PARENTELA { get; set; }
pulbic string GRADO_PARENTELA { get; set; }
}
public IDictionary<string, int> GetParentelaMapping()
{
using (var conn = dataContextFactory.Create())
{
var result = conn.GetTable<GrandoParentela>()
.ToDictionary(
row => row.GRADO_PARENTELA,
row => row.ID_GRADO_PARENTELA, StringComparer.OrdinalIgnoreCase);
return result;
}
}
Related
I have a Asp.Net MVC project created from Syncfusion ASP.New MVC (Essential JS 2) VS template that is using Syncfusion's Data Grid. I can get the CrudUpdate event set in CrudUrl to fire at the server, however the value returned to CrudUpdate is empty. action parameter seems correctly set.
If I cast the value as Object, I get back a not-null, but VS cannot interrogate it. My guess is some weirdness in the way the value is cast or returned.
Has anyone got a complete working sample of the Syncfusion grid using the CrudUrl method with MVC (not asp). I am also guessing I may have some dependency issue.
View
#Html.EJS().Grid("CrudUrl").DataSource(dataManager => { dataManager.Url("/TestGrid2/UrlDatasource").CrudUrl("/TestGrid2/CrudUpdate").Adaptor("UrlAdaptor"); }).Columns(col =>
{
col.Field("RowKey").IsPrimaryKey(true).Add();
col.Field("PartitionKey").Add();
col.Field("sourceResourceId").Add();
col.Field("imagesLocation").Add();
col.Field("imagesResourceGroup").Add();
col.Field("imagePrefix").Add();
col.Field("imageVersion").Add();
}).AllowPaging().Toolbar(new List<string>() { "Search", "Add", "Edit", "Delete", "Update", "Cancel" }).EditSettings(edit => { edit.AllowAdding(true).AllowEditing(true).AllowDeleting(true); }).Render()
Controller
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Script.Services;
using System.Web.Services;
using DB;
//using Microsoft.AspNetCore.Mvc;
using Syncfusion.EJ2.Base;
namespace VMSSManagmentConsole.Controllers
{
public class TestGrid2Controller : Controller
{
private ModelContainer db = new ModelContainer();
public ActionResult TestGrid2()
{
//var items = db.ManagementItems.ToList();
//ViewBag.dataSource = items;
return View();
}
public ActionResult UrlDatasource([FromBody]DataManagerRequest dm)
{
IEnumerable DataSource = db.ManagementItems.ToList();
DataOperations operation = new DataOperations();
int count = DataSource.Cast<ManagementItem>().Count();
if (dm.Skip != 0)
{
DataSource = operation.PerformSkip(DataSource, dm.Skip); //Paging
}
if (dm.Take != 0)
{
DataSource = operation.PerformTake(DataSource, dm.Take);
}
var result = (ActionResult)(dm.RequiresCounts ? Json(new { result = DataSource, count = count }) : Json(DataSource));
return result;
}
public ActionResult CrudUpdate([FromBody]ICRUDModel<ManagementItem> value, string action)
{
//if (value.action == "update")
//{
// var ord = value.value;
// ManagementItem val = db.ManagementItems.Where(or => or.RowKey == ord.RowKey).FirstOrDefault();
// val.imagePrefix = ord.imagePrefix;
// val.imagesLocation = ord.imagesLocation;
// val.imagesResourceGroup = ord.imagesResourceGroup;
// val.imageVersion = ord.imageVersion;
// val.sourceResourceId = ord.sourceResourceId;
//}
//else if (value.action == "insert")
//{
// db.ManagementItems.Add(value.value);
//}
//else if (value.action == "remove")
//{
// db.ManagementItems.Remove(db.ManagementItems.Where(or => or.RowKey == value.key.ToString()).FirstOrDefault());
// return Json(value);
//}
//return Json(value.value);
return null;
}
public class ICRUDModel<T> where T : class
{
public string action { get; set; }
public string table { get; set; }
public string keyColumn { get; set; }
public object key { get; set; }
public T value { get; set; }
public List<T> added { get; set; }
public List<T> changed { get; set; }
public List<T> deleted { get; set; }
public IDictionary<string, object> #params { get; set; }
}
}
}
Use the DataGrid scaffold wizard. On the third page select DataSourceType = "Remote Data". A page and controller will be created with the correct code.
For your reference, we have created a sample and perform CRUD actions. Please refer the attached sample for more information.
Sample: https://www.syncfusion.com/downloads/support/directtrac/general/ze/GridEJ2Mvc-914352281
The reported problem occurred when model mismatched. For Example, when we specify the number column field(EmployeeID) in grid but while inserting you did not specify the value for that column then it shows value as null in CrudUpdate, for this scenario you need to specify the nullable value for that field in model class as follows.
public class OrdersDetails
{
public OrdersDetails(int OrderID, string CustomerId, int EmployeeId, double Freight, bool Verified, DateTime OrderDate, string ShipCity, string ShipName, string ShipCountry, DateTime ShippedDate, string ShipAddress)
{
this.OrderID = OrderID;
this.CustomerID = CustomerId;
this.EmployeeID = EmployeeId;
. . . . .
}
public static List<OrdersDetails> GetAllRecords()
{
if (order.Count() == 0)
{
int code = 10000;
for (int i = 1; i < 10; i++)
{
order.Add(new OrdersDetails(code + 1, "ALFKI", i + 0, 2.3 * i, false, new DateTime(1991, 05, 15), "Berlin", "Simons bistro", "Denmark", new DateTime(1996, 7, 16), "Kirchgasse 6"));
. . . . .
}
}
return order;
}
public int? OrderID { get; set; }
public string CustomerID { get; set; }
public int? EmployeeID { get; set; } // it accept null value
. . . . .
}
}
If you still face the problem then share more details or below information that will helpful for us to validate further and provide a better solution as soon as possible.
• Did the problem occurred for both update and insert?
• Share package version details.
Regards,
Thavasianand S.
I am new to the Neo4jClient as well as Neo4J so was not sure how to query for the data and get a master detail like data in the neo4j. Let me explain this with an example:
lets suppose I have a graph as below:
root -[:DEFINES] -> Shipment 1
-[:HAS_CONSIGNMENT]->Consignment 1
-[:HAS_ITEM]->Load Item 11
-[:HAS_ITEM]->Load Item 12
-[:HAS_CONSIGNEE]->Consignee 1
-[:HAS_CONSIGNMENT]->Consignment 2
-[:HAS_ITEM]->Load Item 21
-[:HAS_ITEM]->Load Item 22
-[:HAS_CONSIGNEE]->Consignee 2
now suppose I want to get all the graph t o populate my Domain Model like below
public class Shipment
{
public List<Consignment> Consignments {get; set;}
}
public class Consignment
{
public List<LoadItem> LoadItems {get; set;}
public Consignee ShippedTo {get; set;}
}
public class LoadItem
{
}
i know that I can probably build a Cypher query like below
How to retrieve connected graph using neo4jclient
query = client.Cypher.Start(new { root = client.RootNode }).
Match("root-[:DEFINES]->load-[:HAS_CONSIGNMENT]->consignments -[:HAS_ITEM]->loadItem").Match("consignments-[:HAS_CONSIGNEE]->consignee").
Where((Load load) => load.Id == myId).
Return(
(load,consignments, loaditems)=>
new {
loadInfo = load.As<Node<Load>>(),
consignments = consignments.CollectAs<Consignment>(),
loadItems = loaditems.CollectAs<LoadItem>()
});
but I am not sure how this can be converted to represent the second level of list that gives me that Consignment 2 has Load Item 21 & 22 where as Consignment 1 has Item 11 & 12.
can some one please help me understand how this works as I primarily have been working in the EF and the graph query is really new to me.
Regards
Kiran
Right, this is the way I've got this working (I'm pretty sure Tatham will come along with a better answer - so hold out for a bit)
public static ICollection<Shipment> Get()
{
var query = GraphClient.Cypher
.Start(new {root = GraphClient.RootNode})
.Match(
string.Format("root-[:{0}]->shipment-[:{1}]-consignments-[:{2}]->loadItem", Defines.TypeKey, HasConsignment.TypeKey, HasItem.TypeKey),
string.Format("consignments-[:{0}]->consignee", HasConsignee.TypeKey)
)
.Return((shipment, consignments, loadItem, consignee) =>
new
{
Shipment = shipment.As<Node<Shipment>>(),
Consignment = consignments.As<Consignment>(),
LoadItem = loadItem.CollectAs<LoadItem>(),
Consignee = consignee.As<Consignee>(),
});
var results = query.Results.ToList();
var output = new List<Node<Shipment>>();
foreach (var result in results)
{
var shipmentOut = output.SingleOrDefault(s => s.Reference == result.Shipment.Reference);
if (shipmentOut == null)
{
shipmentOut = result.Shipment;
shipmentOut.Data.Consignments = new List<Consignment>();
output.Add(shipmentOut);
}
result.Consignment.LoadItems = new List<LoadItem>();
result.Consignment.LoadItems.AddRange(result.LoadItem.Select(l => l.Data));
shipmentOut.Data.Consignments.Add(result.Consignment);
}
return output.Select(s => s.Data).ToList();
}
This will get you all the Shipments and Consignments etc.
However I note you do: .Where((Load load) => load.Id == myId) which implies you know the shipment id.
As a consequence, we can simplify the code a little bit - as we don't need to use 'root', and we can pass in the Shipment ID.
public static Shipment Get2(NodeReference<Shipment> shipmentNodeReference)
{
var query = GraphClient.Cypher
.Start(new {shipment = shipmentNodeReference})
.Match(
string.Format("shipment-[:{0}]-consignments-[:{1}]->loadItem", HasConsignment.TypeKey, HasItem.TypeKey),
string.Format("consignments-[:{0}]->consignee", HasConsignee.TypeKey)
)
.Return((shipment, consignments, loadItem, consignee) =>
new {
Shipment = shipment.As<Node<Shipment>>(),
Consignment = consignments.As<Consignment>(),
LoadItem = loadItem.CollectAs<LoadItem>(),
Consignee = consignee.As<Consignee>(),
});
var results = query.Results.ToList();
//Assuming there is only one Shipment returned for a given ID, we can just take the first Shipment.
Shipment shipmentOut = results.First().Shipment.Data;
shipmentOut.Consignments = new List<Consignment>();
foreach (var result in results)
{
result.Consignment.ShippedTo = result.Consignee;
result.Consignment.LoadItems = new List<LoadItem>();
result.Consignment.LoadItems.AddRange(result.LoadItem.Select(l => l.Data));
shipmentOut.Consignments.Add(result.Consignment);
}
return shipmentOut;
}
For your info, the DataElements I was using were:
public class Shipment
{
public string Id { get; set; }
public List<Consignment> Consignments { get; set; }
public override string ToString() { return Id; }
}
public class Consignment
{
public string Id { get; set; }
public List<LoadItem> LoadItems { get; set; }
public Consignee ShippedTo { get; set; }
public override string ToString() { return Id; }
}
public class Consignee
{
public string Name { get; set; }
public override string ToString() { return Name; }
}
public class LoadItem
{
public string Item { get; set; }
public override string ToString() { return Item; }
}
With relationships all defined like:
public class HasConsignment : Relationship, IRelationshipAllowingSourceNode<Shipment>, IRelationshipAllowingTargetNode<Consignment>
{
public const string TypeKey = "HAS_CONSIGNMENT";
public HasConsignment() : base(-1) {}
public HasConsignment(NodeReference targetNode): base(targetNode) {}
public HasConsignment(NodeReference targetNode, object data) : base(targetNode, data) {}
public override string RelationshipTypeKey { get { return TypeKey; } }
}
(with obvious changes where needed)
I am working on SOA based project and i got got a situation where I am sending the whole array of object to server and then I have to see which of the objects are new and which one I have to update, hence I am looking for some generic function which can get me the list with update , delete or insert attribute
I was facing the same problem where I was sending entity with multiple children entities. The challenge was to figure out what child entity has been updated, added or deleted. Here what I did.
Implemented IObjectWithState with ChildEntity. (Inspired from one of pluralsight entityframework video)
Pull the server side version of entity.
Invoked FindDifference to get the difference of Child entities on client and server
IList<ClassTicket> clientSideTickets = /// What received from client
IList<ClassTicket> serverSideTickets = /// What received from database
var diffTickets = FindDifference(clientSideTickets ,serverSideTickets ,
(ticket1, ticket2) => ticket1.Id == ticket2.Id,(ticket1, ticket2) => ticket1.Name == ticket2.Name && ticket1.NoOfTicketsAvailable == ticket2.NoOfTicketsAvailable && ticket1.Price == ticket2.Price);
public interface IObjectWithState
{
State State { get; set; }
}
// My Child Entity
public class ClassTicket: IObjectWithState
{
public int Id { get; set; }
public string Name { get; set; }
public decimal Price { get; set; }
public short NoOfTicketsAvailable { get; set; }
public State State { get; set; }
}
public static IEnumerable<T> FindDifference<T>(IEnumerable<T> clientList, IEnumerable<T> serverList, Func<T, T, bool> identityDetector, Func<T, T, bool> changeDetector) where T : IObjectWithState
{
var finalList = new List<T>();
var clientItems = clientList as T[] ?? clientList.ToArray();
var serverItems = serverList as T[] ?? serverList.ToArray();
foreach (var clientItem in clientItems)
{
bool foundInServerList = false;
foreach (var serverItem in serverItems)
{
if(identityDetector(clientItem, serverItem))
{
foundInServerList = true;
clientItem.State = !changeDetector(clientItem, serverItem) ? State.Modified : State.Unchanged;
finalList.Add(clientItem);
break;
}
}
if(!foundInServerList)
{
clientItem.State = State.Added;
finalList.Add(clientItem);
}
}
foreach (var serverItem in serverItems)
{
var foundInClientList = clientItems.Any(clientItem => identityDetector(serverItem, clientItem));
if (!foundInClientList)
{
serverItem.State = State.Deleted;
finalList.Add(serverItem);
}
}
return finalList;
}
I'm an experienced programmer, but new to LINQ/Moq/Ninject/MVC/MS Test/etc and have run into an issue I haven't been able to figure out.
I have built the SportsStore sample from the Pro ASP.NET MVC 2 Framework book (but with .NET 4.5/MVC 4). I got that working and now I've begun to convert it to work with our real database. The main difference at this point is that we do not only have a Product class, but also a ProductSub class. Each Product class consists of 1 or more ProductSub's and I have defined this with an EntitySet Association. To make the CartController to know which ProductSub to add to the Cart I decided to change CartController.AddToCart to take a productSubId instead of a productId.
Everything seems to work fine when I run the website and manually click "add product". However, when I run my unit tests I get a NullReferenceException because cart.Lines[0] is null. I don't think the error is in CartController since that seems to work when I run the webpage, and I tried to use the FakeProductsRepository (modified to add ProductSubID's) to rule out Moq causing this (which didn't help, so I don't think the error has anything to do with Moq).
I've figured out that this line in CartController returns null in the unit test but not when I run the webpage:
productsRepository.ProductSubs.FirstOrDefault(ps => ps.ProductSubID == productSubId);
So I tried to hard code the CartController to see if LINQ to the Product instead would work, which it did! I think that means that the productsRepository have Product's, but that for some reason the Product's doesn't have a ProductSub's. I'm I right so far?
My best guess is that there's something wrong with this code in the unit test:
new Product { ProductID = 2, ProductSubs = new List<ProductSub> { new ProductSub { ProductSubID = 456} } }
But I can't figure out what. Is it wrong to use List? I tried using EntitySet instead but it made got the same error.
Unit test code:
[TestMethod]
public void Can_Add_Product_To_Cart()
{
// Arrange: Give a repository with some products...
var mockProductsRepository = UnitTestHelpers.MockProductsRepository(
new Product { ProductID = 1, ProductSubs = new List<ProductSub> { new ProductSub { ProductSubID = 123 } } },
new Product { ProductID = 2, ProductSubs = new List<ProductSub> { new ProductSub { ProductSubID = 456 } } }
);
var cartController = new CartController(mockProductsRepository, null);
var cart = new Cart();
// Act: When a user adds a product to their cart...
cartController.AddToCart(cart, 456, null);
// Assert: Then the product is in their cart
Assert.AreEqual(1, cart.Lines.Count);
Assert.AreEqual(456, cart.Lines[0].ProductSub.ProductSubID);
}
Cart class:
public class Cart
{
private List<CartLine> lines = new List<CartLine>();
public IList<CartLine> Lines { get { return lines.AsReadOnly(); } }
public void AddItem(ProductSub productSub, int quantity)
{
var line = lines.FirstOrDefault(x => x.ProductSub.ProductSubID == productSub.ProductSubID);
if (line == null)
lines.Add(new CartLine { ProductSub = productSub, Quantity = quantity });
else
line.Quantity += quantity;
}
public decimal ComputeTotalValue()
{
return lines.Sum(l => (decimal)l.ProductSub.Price * l.Quantity);
}
public void Clear()
{
lines.Clear();
}
public void RemoveLine(ProductSub productSub)
{
lines.RemoveAll(l => l.ProductSub.ProductSubID == productSub.ProductSubID);
}
}
public class CartLine
{
public ProductSub ProductSub { get; set; }
public int Quantity { get; set; }
}
Product class:
[Table]
public class Product
{
[HiddenInput(DisplayValue = false)]
[Column(Name = "id", IsPrimaryKey = true, IsDbGenerated = true, AutoSync = AutoSync.OnInsert)]
public int ProductID { get; set; }
[Required(ErrorMessage = "Please enter a product name")]
[Column]
public string Name { get; set; }
[Required(ErrorMessage = "Please enter a description")]
[DataType(DataType.MultilineText)]
[Column(Name = "info")]
public string Description { get; set; }
public float LowestPrice
{
get { return (from product in ProductSubs select product.Price).Min(); }
}
private EntitySet<ProductSub> _ProductSubs = new EntitySet<ProductSub>();
[System.Data.Linq.Mapping.Association(Storage = "_ProductSubs", OtherKey = "ProductID")]
public ICollection<ProductSub> ProductSubs
{
get { return _ProductSubs; }
set { _ProductSubs.Assign(value); }
}
[Required(ErrorMessage = "Please specify a category")]
[Column]
public string Category { get; set; }
}
[Table]
public class ProductSub
{
[HiddenInput(DisplayValue = false)]
[Column(Name = "id", IsPrimaryKey = true, IsDbGenerated = true, AutoSync = AutoSync.OnInsert)]
public int ProductSubID { get; set; }
[Column(Name = "products_id")]
private int ProductID;
private EntityRef<Product> _Product = new EntityRef<Product>();
[System.Data.Linq.Mapping.Association(Storage = "_Product", ThisKey = "ProductID")]
public Product Product
{
get { return _Product.Entity; }
set { _Product.Entity = value; }
}
[Column]
public string Name { get; set; }
[Required]
[Range(0.00, double.MaxValue, ErrorMessage = "Please enter a positive price")]
[Column]
public float Price { get; set; }
}
UnitTestHelpers code (which should be fine since I tried the FakeProductsRepository):
public static IProductsRepository MockProductsRepository(params Product[] products)
{
var mockProductsRepos = new Mock<IProductsRepository>();
mockProductsRepos.Setup(x => x.Products).Returns(products.AsQueryable());
return mockProductsRepos.Object;
}
CartController code (which should be fine since it works on the webpage):
public RedirectToRouteResult AddToCart(Cart cart, int productSubId, string returnUrl)
{
//Product product = productsRepository.Products.FirstOrDefault(p => p.ProductID == 2);
//cart.AddItem(product.ProductSubs.FirstOrDefault(), 1);
ProductSub productSub = productsRepository.ProductSubs.FirstOrDefault(ps => ps.ProductSubID == productSubId);
cart.AddItem(productSub, 1);
return RedirectToAction("Index", new { returnUrl });
}
Code for FakeProductsRepository:
public class FakeProductsRepository : IProductsRepository
{
private static IQueryable<Product> fakeProducts = new List<Product> {
new Product { Name = "Football", ProductSubs = new List<ProductSub> { new ProductSub { ProductSubID = 123, Price = 25 } } },
new Product { Name = "Surf board", ProductSubs = new List<ProductSub> { new ProductSub { ProductSubID = 456, Price = 179 } } },
new Product { Name = "Running shoes", ProductSubs = new List<ProductSub> { new ProductSub { ProductSubID = 789, Price = 95 } } }
}.AsQueryable();
public FakeProductsRepository(params Product[] prods)
{
fakeProducts = new List<Product>(prods).AsQueryable();
}
public IQueryable<Product> Products
{
get { return fakeProducts; }
}
public IQueryable<ProductSub> ProductSubs
{
get { return fakeProducts.SelectMany(ps => ps.ProductSubs); }
}
public void SaveProduct(Product product)
{
throw new NotImplementedException();
}
public void DeleteProduct(Product product)
{
throw new NotImplementedException();
}
}
Please let me know if you need any other information.
Even though you have provided a lot of code some necessary information is missing so I'm assuming that IProductsRepository.ProductSubs returns IQueryable<ProductSub>. The MockProductsRepository method creates a mock for IProductsRepository but does not do any setup for IProductsRepository.ProductSubs. The mocking framework will most likely return an empty IQueryable<ProductSub>.
In the AddToCart you try to find the ProductSub using productsRepository.ProductSubs.FirstOrDefault. Because the mock returns an empty collection FirstOrDefault will return null thus you call cart.AddItem(null, 1) which explains why cart.Lines[0] is null.
Before fixing the mock you could consider doing parameter validation, e.g.
public void AddItem(ProductSub productSub, int quantity)
{
if (productSub == null)
throw new ArgumentNullException("productSub");
if (quantity < 1)
throw new ArgumentOutOfRangeException("quantity");
Then when you rerun your test it will be much clearer where your problem is.
Next thing will then be to create a setup for IProductsRepository.ProductSubs in MockProductsRepository:
mockProductsRepos
.Setup(x => x.ProductSubs)
.Returns(products.SelectMany(p => p.ProductSubs).AsQueryable());
This simply creates a collection of all the ProductSub objects from the Product objects provided to MockProductsRepository. You can of course modify this as you see fit.
I figured out the solution thanks to Martin Liversage. The mock WAS wrong, but I didn't figure it out because my FakeProductsRepository was ALSO wrong. Due to the dependency between Products and ProductSubs I don't think his suggested change to the mock would work though (but please correct me if I'm wrong).
The issue in FakeProductsRepository was that the constructor overwrote the initial fakeProducts collection with an empty collection. Once I changed that to only overwrite the initial collection if a new collection was supplied as parameter the unit tests worked using the FakeProductsRepository.
public FakeProductsRepository(params Product[] products)
{
if (products != null)
fakeProducts = new List<Product>(products).AsQueryable();
}
Thus there was an issue with the mock since that still didn't work. To solve it all I needed to do was to remove the ProductSubs function from IProductsRepository (which I had intended as a shortcut, but which I realized messed up the mocking). Once I did that and accessed the ProductSubs through the Products in CartController everything worked again.
public RedirectToRouteResult AddToCart(Cart cart, int productSubId, string returnUrl)
{
ProductSub productSub = productsRepository.Products.SelectMany(p => p.ProductSubs).FirstOrDefault(ps => ps.ProductSubID == productSubId);
cart.AddItem(productSub, 1);
return RedirectToAction("Index", new { returnUrl });
}
That was all I needed, but to simplify the test code I also decided to use pure ProductSub objects where that was enough instead of accessing them through a Product. Where I needed the whole Product (ie when the IProductsRepository was involved I used this code which I think is cleaner then creating the whole object on one line (ie with new List etc):
var ps1 = new ProductSub { ProductSubID = 11 };
var p1 = new Product();
p1.ProductSubs.Add(ps1);
I have a wizard step in which a user fills in fields. I then use json to save the values into my database for each wizard step.
However, in my repository I have my savechanges(). But it wont save the changes, instead it throws an error:
Entities in 'NKImodeledmxContainer.SelectedQuestion' participate in the 'QuestionSelectedQuestion' relationship. 0 related 'Question' were found. 1 'Question' is expected.
Anyone know how to get rid of the error? Do I have to get the ID from Question and save it aswell to my database or can I change something in EF so the error message is not getting thrown?
This is my post in my controller:
[HttpPost]
public JsonResult AnswerForm(int id, SelectedQuestionViewModel model)
{
bool result = false;
var goalCardQuestionAnswer = new GoalCardQuestionAnswer();
goalCardQuestionAnswer.SelectedQuestion = new SelectedQuestion();
goalCardQuestionAnswer.SelectedQuestion.Id = model.QuestionID;
goalCardQuestionAnswer.Comment = model.Comment;
goalCardQuestionAnswer.Grade = model.Grade;
if (goalCardQuestionAnswer.Grade != null)
{
answerNKIRepository.SaveQuestionAnswer(goalCardQuestionAnswer);
answerNKIRepository.Save();
result = true;
return Json(result);
}
answerNKIRepository.SaveQuestionAnswer(goalCardQuestionAnswer);
answerNKIRepository.Save();
return Json(result);
}
My Repository
public class AnswerNKIRepository
{
private readonly NKImodeledmxContainer db = new NKImodeledmxContainer();
public List<SelectedQuestion> GetAllSelectedQuestionsByGoalCardId(int goalCardId)
{
return db.SelectedQuestion.Where(question => question.GoalCard.Id == goalCardId).ToList();
}
public void SaveQuestionAnswer(GoalCardQuestionAnswer goalCardQuestionAnswer)
{
db.GoalCardQuestionAnswer.AddObject(goalCardQuestionAnswer);
}
public void Save()
{
db.SaveChanges();
}
}
This is my ViewModel:
public class SelectedQuestionViewModel
{
public int? Grade { get; set; }
public string Comment { get; set; }
public string SelectedQuestionText { get; set; }
public int QuestionID { get; set; }
}
This is my database model:
The exception complains that SelectedQuestion.Question is a required navigation property but you don't set this property in your code. Try to load the question by Id from the repository and set it to the SelectedQuestion.Question reference: Replace this line ...
goalCardQuestionAnswer.SelectedQuestion.Id = model.QuestionID;
...by...
goalCardQuestionAnswer.SelectedQuestion.Question =
answerNKIRepository.GetQuestionById(model.QuestionID);
And in your repository add the method:
public Question GetQuestionById(int id)
{
return db.Question.Single(q => q.Id == id);
}