I'm using RIA domain services, with entity framework 4 and silverlight 4. When I save changes, when the service call returns, some domain service functions are called wich sets a value to "" that should not be changed at all.
I have two entities
service.metadata.cs:
public partial class EntityA
{
[Key]
public Guid EntityA_Id { get; set; }
public string Name { get; set; }
public int EntityB_Id { get; set; }
[Include]
public EntityB entityB { get; set; }
}
public partial class EntityB
{
[Required]
public string Name { get; set; }
public int EntityB_Id { get; set; }
public EntityCollection<EntityA> entityA { get; set; }
}
On the client side I have a Extra property on EntityA to expose the Name property od EntityB. The server side and domain service never need to know about this property, its for GUI only.
public partial class EntityA
{
//Tags I have tried:
//[IgnoreDataMember]
//[XmlIgnore]
//[Ignore]
//[Exclude]
public string NameOf_EntityB
{
get
{
return this.entityB == null ? string.Empty : this.entityB.Name;
}
set
{
this.entityB.Name = value;
}
}
}
If I edit the entityA's name and call serviceContext.SubmitChanges(), when the call returns some domain service process is setting the EntityA.NameOf_EntityB = ""; So from a user point of view, they save one value and the other blanks out.
I need to stop this from happening. I have tried various data attributes, but they either don't work on the client side, or have no effect.
Any idea what to do to stop the domain service from changing this value?
here's the callstack right before the value is changed:
System.ServiceModel.DomainServices.Client!System.ServiceModel.DomainServices.Client.ObjectStateUtility.**ApplyValue**(object o, object value, System.Reflection.PropertyInfo propertyInfo, System.Collections.Generic.IDictionary<string,object> originalState, System.ServiceModel.DomainServices.Client.LoadBehavior loadBehavior) + 0x74 bytes
System.ServiceModel.DomainServices.Client!System.ServiceModel.DomainServices.Client.ObjectStateUtility.ApplyState(object o, System.Collections.Generic.IDictionary<string,object> stateToApply, System.Collections.Generic.IDictionary<string,object> originalState, System.ServiceModel.DomainServices.Client.LoadBehavior loadBehavior) + 0x330 bytes
System.ServiceModel.DomainServices.Client!System.ServiceModel.DomainServices.Client.Entity.ApplyState(System.Collections.Generic.IDictionary<string,object> entityStateToApply, System.ServiceModel.DomainServices.Client.LoadBehavior loadBehavior) + 0x68 bytes
System.ServiceModel.DomainServices.Client!System.ServiceModel.DomainServices.Client.Entity.Merge(System.ServiceModel.DomainServices.Client.Entity otherEntity, System.ServiceModel.DomainServices.Client.LoadBehavior loadBehavior) + 0x5a bytes
System.ServiceModel.DomainServices.Client!System.ServiceModel.DomainServices.Client.DomainContext.ApplyMemberSynchronizations(System.Collections.Generic.IEnumerable<System.ServiceModel.DomainServices.Client.ChangeSetEntry> changeSetResults) + 0x10e bytes
System.ServiceModel.DomainServices.Client!System.ServiceModel.DomainServices.Client.DomainContext.ProcessSubmitResults(System.ServiceModel.DomainServices.Client.EntityChangeSet changeSet, System.Collections.Generic.IEnumerable<System.ServiceModel.DomainServices.Client.ChangeSetEntry> changeSetResults) + 0x262 bytes
System.ServiceModel.DomainServices.Client!System.ServiceModel.DomainServices.Client.DomainContext.CompleteSubmitChanges(System.IAsyncResult asyncResult) + 0x1cb bytes
System.ServiceModel.DomainServices.Client!System.ServiceModel.DomainServices.Client.DomainContext.SubmitChanges.AnonymousMethod__5() + 0x2e bytes
Edit:
found a work around for now. In the callback of the ServiceContext.submitChanges() call I can call ServiceContext.RejectChanges() to undo the change that was made to EntityB. I don't trust this solution though as other changes could have been made before the async call returns and those changes would be rejected as well. The ideal solution would be to have that value ignored and NOT set at all
You may need to tell WCF RIA a little more about your entities with some attributes:
public partial class EntityA
{
[Key]
public Guid EntityA_Id { get; set; }
public string Name { get; set; }
public int EntityB_Id { get; set; }
[Include]
[Association("EntityA-EntityB", "EntityA_Id", "EntityB_Id", IsForeignKey=false)]
public EntityB entityB { get; set; }
}
public partial class EntityB
{
[Required]
public string Name { get; set; }
[Key]
public int EntityB_Id { get; set; }
public Guid EntityA_Id { get; set; }
[Include]
[Association("EntityA-EntityB", "EntityA_Id", "EntityB_Id", IsForeignKey=true)]
public EntityCollection<EntityA> entityA { get; set; }
}
Here's my solution:
private bool isExpanded = false;
public bool IsExpanded
{
get { return isExpanded; }
set
{
string stack = (new System.Diagnostics.StackTrace()).ToString();
if (!stack.Contains("ObjectStateUtility.ApplyState") && isExpanded != value)
{
isExpanded = value;
RaisePropertyChanged("IsExpanded");
}
}
}
Related
In an ASP.NET 3.1 CORE project, using EF, I am trying to implement an object that holds a type of ICollection<Enum> type.
the problem is after reading some tutorials and trying to migrate it to my database something seems off, I will attach screenshots and code for more understanding.
this is the object class :
public class UsersCredentialsModel
{
[Key]
public string UserId { get; set; }
public ICollection<ServiceModel> Services { get; set; }
public string Username { get; set; }
public string Password { get; set; }
public string Hash { get; set; }
}
The ServiceModel class:
public class ServiceModel
{
[Key]
public string ServiceId { get; set; }
public Service Service { get; set; }
}
The Service Enum Class:
public enum Service : int
{
Badoo = 0,
Tinder = 1,
Grinder = 2,
OkCupid = 3
}
This is the AppDbContext class:
public class AppDbContext : IdentityDbContext<ApplicationUser>
{
public AppDbContext(DbContextOptions<AppDbContext> options) : base(options)
{
}
protected override void OnModelCreating(ModelBuilder builder)
{
builder.Entity<Message>().Property(m => m.Service).HasConversion<int>();
builder.Entity<ApplicationUser>().HasMany<Message>(m => m.Messages).WithOne(u =>
u.User).IsRequired();
builder.Entity<ServiceModel>().Property(m => m.Service).HasConversion<int>();
builder.Entity<UsersCredentialsModel>().HasMany(s => s.Services);
base.OnModelCreating(builder);
}
public DbSet<UsersCredentialsModel> UsersCredentialsModels { get; set; }
public DbSet<ServiceModel> ServiceModel { get; set; }
public DbSet<Message> Messages { get; set; }
public DbSet<CookieModel> CookieModel { get; set; }
public DbSet<ProjectionModel> ProjectionModel { get; set; }
}
This is a picture of the UsersCredentialsModel database schema:
** I believe that there should be a filed called "ServiceId" corresponding to the Id of the second table.
and finally a picture of the ServiceModel schema:
from what I understood you can't implement ICollection of type ENUM and you have to wrap it in a class so basically you need an object to hold the ENUM with an ID and another Id that holds the userId.
The problem is that UserCredentialsModel table should hold an Id property of ServiceId coming from ServiceModel table.
because the class has a field of ICollection but when migrating it does nothing
On the service side I have an abstract base class like so:
[DataContract]
public abstract class EntityBase : IObjectState, IDatabaseMetaData
{
[NotMapped]
[DataMember]
public ObjectState ObjectState { get; set; }
#region IDatabaseMetaData Members
[DataMember] public DateTime InsertDatetime { get; set; }
[DataMember] public int InsertSystemUserId { get; set; }
[DataMember] public DateTime? UpdateDatetime { get; set; }
[DataMember] public int? UpdateSystemUserId { get; set; }
public virtual SystemUser InsertSystemUser { get; set; }
public virtual SystemUser UpdateSystemUser { get; set; }
#endregion
}
Here is an implementing class (data contract):
[DataContract(Namespace = Constants.MyNamespace)]
public class AccountClass : EntityBase
{
[DataMember] public int AccountClassId { get; set; }
[DataMember] public string AccountClassCode { get; set; }
[DataMember] public string AccountClassDesc { get; set; }
}
On the client side I have essentially duplicated contracts. Here is the Client.AccountClass:
public class AccountClass : ObjectBase
{
private int _accountClassId;
private string _accountClassCode;
private string _accountClassDesc;
public int AccountClassId
{
get { return _accountClassId;}
set
{
if (_accountClassId == value) return;
_accountClassId = value;
OnPropertyChanged(() => AccountClassId);
}
}
public string AccountClassCode
{
get { return _accountClassCode; }
set
{
if (_accountClassCode == value) return;
_accountClassCode = value;
OnPropertyChanged(() => AccountClassCode);
}
}
public string AccountClassDesc
{
get { return _accountClassDesc; }
set
{
if (_accountClassDesc == value) return;
_accountClassDesc = value;
OnPropertyChanged(() => AccountClassDesc);
}
}
}
..and here is the parts of ObjectBase that matter:
public abstract class ObjectBase : IObjectState, IDatabaseMetaData
{
public ObjectState ObjectState { get; set; }
#region IDatabaseMetaData Members
public DateTime InsertDatetime { get; set; }
public int InsertSystemUserId { get; set; }
public DateTime? UpdateDatetime { get; set; }
public int? UpdateSystemUserId { get; set; }
#endregion
}
When I debug the service in my WcfMessageInspector.BeforeSendReply, I can see the message correctly sending the IObjectState and IDatabaseMetaData values. However, on the client side, they are always null (or default values). I have tried using KnownTypes, applying the namespace to the abstract class. The only way I can serialize everything correctly is to get rid of the interfaces and base classes all together and put the properties directly on the Client/Server AccountClass object. What am I missing here? Thanks.
Update 1
This seems to be a namespace thing. If I move my EntityBase and ObjectBase into the same CLR Namespace, everything works (with no KnownType attributes). In my client contract's AssemblyInfo.cs file I have this:
[assembly: ContractNamespace(Constants.MyNamespace, ClrNamespace = "Project.Name.Client.Entities")]
I tried adding ContractNamespaces here to no avail. Like I said, unless the EntityBase and ObjectBase are in the same namespace, it won't work. However, this is a problem for me because it creates a circular reference, unless I move a lot of stuff around.
Any idea how I can see what the full data contract (namespaces, DataMembers, etc) looks like just before/after serialization on the client/server? I tried intercepting the OnSerializing event without much luck. Thanks again.
This was a namespace issue.
I explicitly add the correct namespace to all parties involved and everything works great. One thing I notice is that the ContractNamespace's ClrNamespace in your AssemblyInfo.cs file should match the AssemblyTitle. Also, putting more than one ContractNamespace in the AssemblyInfo.cs does nothing. For example, I was doing this:
[assembly: ContractNamespace(Constants.MyNamespace, ClrNamespace = "Company.Project.Client.Entities")]
[assembly: ContractNamespace(Constants.MyNamespace, ClrNamespace = "Company.Project.Client.Entities.Core")]
Any POCO in the Company.Project.Client.Entities.Core would not serialize correctly until I explicitly put the DataContract namespace on it like so
[DataContract(Namespace = Constants.MyNamespace)]
public class SomeObject
{
[DataMember] public string SomeProperty { get; set; }
//..etc
}
Alternatively, I could have restructured the project so SomeObject was in the Company.Project.Client.Entities namespace and that would have worked.
Finally, the most helpful thing to debugging this was looking at the WSDL, and then using a custom IDispatchMessageInspector to see the actual messages AfterReceiveRequest and BeforeSendReply. Hopefully this helps someone.
I have and entity framework project exposed via a data service:
public class VersionContext : DbContext
{
public DbSet<VersionTreeEntry> VersionTreeEntries { get; set; }
public DbSet<PluginState> PluginStates { get; set; }
public static void SetForUpdates()
{
Database.SetInitializer(new MigrateDatabaseToLatestVersion<VersionContext, Configuration>());
}
}
public class VersionTreeEntry
{
public VersionTreeEntry()
{
Children = new List<VersionTreeEntry>();
PluginStates = new List<PluginState>();
}
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public long Id { get; set; }
public virtual ICollection<VersionTreeEntry> Children { get; set; }
public virtual ICollection<PluginState> PluginStates { get; set; }
public virtual VersionTreeEntry Ancestor { get; set; }
/// <summary>
/// Links to the ProtoBufDataItem Id for the session state.
/// </summary>
public int DataId { get; set; }
public string Notes { get; set; }
[Required]
public DateTime TimeStamp { get; set; }
[MinLength(1, ErrorMessage = "Tag cannot have a zero length")]
[MaxLength(20, ErrorMessage = "A tag name cannot contain over 20 characters")]
public string Tag { get; set; }
public bool IsUiNodeExpanded { get; set; }
[Required]
public string Version { get; set; }
[Required]
public string SessionName { get; set; }
}
public class PluginState
{
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public long Id { get; set; }
public string PluginName { get; set; }
[Required]
public byte[] Data { get; set; }
}
As far as I can see, the data classes are defined correctly. I try to create some new objects and add them into the context, with their relations intact:
var session = new Session();
session.SessionName = "My new session";
VersionTreeEntry versionTreeEntry = new VersionTreeEntry();
versionTreeEntry.SessionName = session.SessionName;
versionTreeEntry.Version = Assembly.GetExecutingAssembly().GetName().Version.ToString();
versionTreeEntry.TimeStamp = DateTime.Now;
_versionContext.AddToVersionTreeEntries(versionTreeEntry);
foreach (var plugin in session.Plugins)
{
using (var ms = new MemoryStream())
{
plugin.SaveState(ms);
PluginState state = new PluginState();
state.PluginName = plugin.PluginName;
state.Data = ms.ToArray();
versionTreeEntry.PluginStates.Add(state);
}
}
_versionContext.SaveChanges();
The problem is that the PluginState instances never actually get added to the database. If I add code to add them manually to the context, they do get added, but the foreign key pointing back to the VersionTreeEntry is null.
Again, this is a WCF DataService rather than vanilla EF, any idea what might be wrong?
Cheers
Posting the answer here from the comment section.
Agreed. The best way to do this is to call the following API:
_versionContext.AddRelatedObject(versionTreeEntry, "PluginStates", state);
Thanks
Pratik
I get this webservice error sometimes on a SL5 + EF + WCF app.
"Parameter 'role' of domain operation entry 'AddUserPresentationModelToRole' must be one of the predefined serializable types."
here is a similar error, however his solution doesn't work for me.
I have the codegenned DomainService which surfaces the database entities to my client:
[EnableClientAccess()]
public partial class ClientAppDomainService : LinqToEntitiesDomainService<ClientAppUserEntitlementReviewEntities>
{
public IQueryable<Account> GetAccounts()
{
return this.ObjectContext.Accounts;
}
//..etc...
and my custom service which is surfacing a Presentation model, and db entities.
[EnableClientAccess]
[LinqToEntitiesDomainServiceDescriptionProvider(typeof(ClientAppUserEntitlementReviewEntities))]
public class UserColourService : DomainService
{
[Update(UsingCustomMethod = true)]
public void AddUserPresentationModelToRole(UserPresentationModel userPM, Role role, Reviewer reviewer)
{
...
}
public IDictionary<long, byte> GetColourStatesOfUsers(IEnumerable<RBSUser> listOfUsers, string adLogin)
{
//....
}
}
and the PresentationModel:
public class UserPresentationModel
{
[Key]
public long UserID { get; set; }
public byte UserStatusColour { get; set; }
public string MessageText { get; set; }
[Include]
[Association("asdf", "UserID", "UserID")]
public EntityCollection<Account> Accounts { get; set; }
public DateTime AddedDate { get; set; }
public Nullable<long> CostCentreID { get; set; }
public DateTime? DeletedDate { get; set; }
public string EmailAddress { get; set; }
public long EmployeeID { get; set; }
public string FirstName { get; set; }
public Nullable<bool> IsLeaver { get; set; }
public string LastName { get; set; }
public DateTime LastSeenDate { get; set; }
public string LoginDomain { get; set; }
public string LoginName { get; set; }
public byte WorldBuilderStatusID { get; set; }
}
Also cannot get the solution to reliably fail. It seems whenever I change the service slightly ie make it recompile, everything works.
RIAServices unsupported types on hand-built DomainService - seems to be saying the same thing, that decorating the hand built services with the LinqToEntitiesDomainServiceDescriptionProvider should work.
Possible answer here will post back here too with results.
From Colin Blair:
I am a bit surprised it ever works, I don't think I have seen anyone trying to pass additional entiities into a named update before. It might be a bug in RIA Services that it is working at all. What are you trying to accomplish?
Side note, you have a memory leak with your ObjectContext since it is not getting disposed of correctly. Is there a reason you aren't using the LinqToEntitiesDomainSerivce? It would take care of managing the ObjectContext's lifetime for you.
Results:
1) This makes sense. Have refactored out to more sensible parameters now (ints / strings), and all working.
2) Have brought together my 3 separate services into 1 service, which is using the LinqToEntitiesDomainSerivce. The reason I'd split it out before was the assumption that having a CustomUpdate with a PresentationModel didn't work.. and I had to inherit off DomainService instead. I got around this by making a method:
// need this to avoid compile errors for AddUserPresentationModelToRole.. should never be called
public IQueryable<UserPresentationModel> GetUserPresentationModel()
{
return null;
}
I have a problem with NHibernate for a longtime which I solved by non-optimal ways/workarounds.
First of all, I'm using WCF REST to communicate with my client application. As you know, serializing persisted entities is not a best practise and always causes other problems. Thus, I always map my entities to DTO's with NHibernates Transformers. The problem is that I have entities which are more complex to use Transformers to convert them.
How can I map sub entities to sub dto's by using transformers or any other nhibernate feature?
Note: I don't want to use 3rd parties like Automapper.
These are the Entities and DTO's which I want to map. Variable names are exactly same with each other.
Entity Classes:
EntityType
public class crmEntityType : EntityModel<crmEntityType>
{
public crmEntityType()
{
Association = new List<crmEntityType>();
Fields = new List<crmCustomField>();
}
public virtual int ID { get; set; }
public virtual string Title { get; set; }
public virtual ICollection<crmEntityType> Associations { get; set; }
public virtual ICollection<crmCustomField> Fields { get; set; }
}
CustomFields
public class crmCustomField : EntityModel<crmCustomField>
{
public virtual int ID { get; set; }
public virtual string Name { get; set; }
public virtual crmEntityType EntityType { get; set; }
}
DTO's
EntityTypeDTO
[DataContract]
public class EntityTypeDTO
{
[DataMember]
public int ID { get; set; }
[DataMember]
public string Title { get; set; }
[DataMember]
public IList<CustomFieldDTO> Fields { get; set; }
[DataMember]
public int[] Associations { get; set; }
}
CustomFieldDTO
[DataContract]
public class CustomFieldDTO
{
[DataMember]
public int ID { get; set; }
[DataMember]
public string Name { get; set; }
[DataMember]
public int EntityType { get; set; }
[DataMember]
public int FieldType { get; set; }
}
I found my solution by spending my day and night to work it out. Finally, I've got the best solution I could find. I hope it helps someone in my condition some day.
This linq query works with just one database round-trip. I think it maps the classes in memory.
return (from entityType in Provider.GetSession().Query<crmEntityType>()
.Fetch(x => x.Association)
.Fetch(x => x.Fields)
.AsEnumerable()
select new EntityTypeDTO()
{
ID = entityType.ID,
Title = entityType.Title,
Association = entityType.Association.Distinct()
.Select(asc => asc.ID).ToArray<int>(),
Fields = entityType.Fields.Distinct()
.Select(fi => new CustomFieldDTO
{ ID = fi.ID,
Name = fi.Name,
Value = fi.Value,
EntityType = fi.EntityType.ID,
Type = fi.Type
}).ToList()
}).ToList();