I have a class named CalculationFunctionGroup where I have an attribute like this:
List<CalculationFunction> functions;
on my OrientDB I have a table named CalculationFunctionGroup with a property functions definaed as EMBEDDEDLIST and linked class CalculationFunction.
When I try to save an object of type CalculationFunctionGroup an exception raises.
The exception tell me:
The field 'functions' has been declared as EMBEDDEDLIST with linked class 'CalculationFunction' but the record has no class.
I try to find this exception in OrientDB source code, and I find this:
There's a check in ODocument class in the method validateEmbedded where there are these code lines:
if (doc.getImmutableSchemaClass() == null)
throw new OValidationException("The field '" + p.getFullName() + "' has been declared as " + p.getType()
+ " with linked class '" + embeddedClass + "' but the record has no class");
So, I don't understand how can I valued the immutableschemaclass property.
Where I try to set my field value from Java, I use this command line:
this.data.field(fieldName, value, OType.EMBEDDEDLIST);
where data is my ODocument instance, fieldName is functions, value is my List of CalculationFunction and OType is EMBEDDEDLIST.
Used Orient version is 2.2.0
EDIT #1
I try this after Alessandro Rota answer, but the error is the same:
ODocument myEntity = new ODocument("CalculationFunctionGroup");
myEntity.field("referenceItem", object.getReferenceItem().getData());
db.save(myEntity);
db.commit();
In this code snippet I've changed the nature of my objct (the original is a typied object as CalculationFunctionGroup and now is an ODocument). But the error is the same.
Another try I've done, the ODocument myEntity has not attached functions (list of CalculationFunction) but the error raises too
EDIT #2
I've tried with code snippet of Alessandro Rota and works fine.
But when I add as field of CalculationFunction a link field I've the same error! Why?
If I add a link field instead of object.getData() with object.getRawField("#rid") it works fine too.
I don't understand because raises that error message, and the reason of different behaviour when I use only #rid field instead complete object
EDIT #3
Latest news:
This is my test scenario:
I have this table:
CalculationFunction with these property (schemafull):
referenceItem LINK
functions EMBEDDEDLIST
When I try to save, I write this code:
ODocument myGroup = new ODocument("CalculationFunctionGroup");
Object rid = null;
if (object.getField("referenceItem") instanceof RegistryMetadata) {
rid = ((RegistryMetadata)(object.getField("referenceItem"))).getRawField("#rid");
} else if (object.getField("referenceItem") instanceof PayrollRegistryMetadata) {
rid = ((PayrollRegistryMetadata)(object.getField("referenceItem"))).getRawField("#rid");
} else if (object.getField("referenceItem") instanceof PreCalculationMetadata) {
rid = ((PreCalculationMetadata)(object.getField("referenceItem"))).getRawField("#rid");
} else if (object.getField("referenceItem") instanceof CalculationMetadata) {
rid = ((CalculationMetadata)(object.getField("referenceItem"))).getRawField("#rid");
}
myGroup.field("referenceItem", rid, OType.LINK);
myGroup.field("scenario", ((Scenario)object.getField("scenario")).getRawField("#rid"));
List<ODocument> lstFunctions = new ArrayList<ODocument>();
if (object.getField("functions") != null) {
Iterable<ODocument> lstFun = (Iterable<ODocument>) object.getField("functions");
Iterator<ODocument> itFun = lstFun.iterator();
while(itFun.hasNext()) {
ODocument currFun = itFun.next();
ODocument oFun = new ODocument("CalculationFunction");
oFun.field("name", currFun.field("name"));
oFun.field("code", currFun.field("code"));
oFun.field("language", currFun.field("language"));
lstFunctions.add(oFun);
}
}
myGroup.field("functions", lstFunctions, OType.EMBEDDEDLIST);
myGroup.save();
db.commit();
This code goes in error, but... If I write this:
myGroup.field("referenceItem2", rid, OType.LINK);
The code works fine.
The difference: referenceItem is a schemafull property, referenceItem2 is a schemaless field.
You could use this code
ODocument cf1= new ODocument("CalculationFunction");
cf1.field("name","Function 1",OType.STRING);
ODocument cf2= new ODocument("CalculationFunction");
cf2.field("name","Function 2",OType.STRING);
List<ODocument> list=new ArrayList<ODocument>();
list.add(cf1);
list.add(cf2);
ODocument p = new ODocument("CalculationFunctionGroup");
p.field("functions", list, OType.EMBEDDEDLIST);
p.save();
Edit 2
If you want add a link you could use this code
ODocument cf1= new ODocument("CalculationFunction");
cf1.field("name","Function 1",OType.STRING);
ODocument p = new ODocument("CalculationFunctionGroup");
p.field("mylink", cf1, OType.LINK);
p.save();
EDIT 3
I have created schemafull property mylink2
I have used this code
ODocument cf1= new ODocument("CalculationFunction");
cf1.field("name","Function 1",OType.STRING);
cf1.save();
ODocument p = new ODocument("CalculationFunctionGroup");
p.field("mylink", cf1.getIdentity(), OType.LINK);
p.field("mylink2", cf1.getIdentity(), OType.LINK);
p.save();
and I got
Hope it helps.
Related
On CRM 2013 on-premise, I'm trying to write a plugin that triggers when an update is made to a field on Quote. The plugin then creates a new custom entity "new_contract".
My plugin is successfully triggered when the update to that field is made. However I keep getting an error message "The given key was not present in the dictionary" when trying to create the new custom entity.
I'm using a "PostImage" in this code. I confirm that it's registered using the same name in Plugin Registration.
Here is the code
var targetEntity = context.GetParameterCollection<Entity>
(context.InputParameters, "Target");
if (targetEntity == null)
{throw new InvalidPluginExecutionException(OperationStatus.Failed,
"Target Entity cannot be null")}
var postImage = context.PostEntityImages["PostImage"];
if (postImage == null)
{throw new InvalidPluginExecutionException(OperationStatus.Failed,
"Post Image is required");}
var quote = context.GenerateCompositeEntity(targetEntity, postImage);
//throw new InvalidPluginExecutionException(OperationStatus.Failed, "Update is captured");
//Guid QuoteId = (Guid)quote.Attributes["quoteid"];
var serviceFactory = (IOrganizationServiceFactory)serviceProvider
.GetService(typeof(IOrganizationServiceFactory));
var service = serviceFactory.CreateOrganizationService(context.UserId);
var contractEntity = new Entity();
contractEntity = new Entity("new_contract");
if (quote.Attributes.Contains("portfolio"))
{
var quotePortfolio = (EntityReference)quote.Attributes["new_portfolio];
contractEntity[Schema.new_contract.PortfolioName] =
new EntityReference(quotePortfolio.LogicalName, quotePortfolio.Id);
}
if (quote.Attributes.Contains(Schema.Quote.QuoteName))
{
var quoteName = (string)quote.Attributes["name"];
contractEntity[Schema.new_contract.contractName] = quoteName;
}
var contractId = service.Create(contractEntity);
I think context does not contain "PostImage" attribute.You should check context to see whether it contains the attribute before getting the data.
Looking at this line in your post above:
var service = serviceFactory.CreateOrganizationService(context.UserId);
I am deducing that the type of your context variable is LocalPluginContext (since this contains the UserId value) which does not expose the images (as another answer states).
To access the images, you need to get to the Plugin Execution Context:
IPluginExecutionContext pluginContext = context.PluginExecutionContext;
Entity postImage = null;
if (pluginContext.PostEntityImages != null && pluginContext.PostEntityImages.Contains("PostImage))
{
postImage = pluginContext.PostEntityImages["PostImage"];
}
In the below code segment, you are checking for the attribute "portfolio" and using "new_portfolio". Can you correct that and let us know whether that worked.
if (quote.Attributes.Contains("portfolio"))
{
var quotePortfolio = (EntityReference)quote.Attributes["new_portfolio];
contractEntity[Schema.new_contract.PortfolioName] = new EntityReference(quotePortfolio.LogicalName, quotePortfolio.Id);
}
First, you don't say what line is throwing the exception. Put in the VS debugger and find the line that is throwing the exception.
I did see that you are trying to read from a dictionary here without first checking if the dictionary contains the key, that can be the source of this exception.
var postImage = context.PostEntityImages["PostImage"];
if (postImage == null)
throw new InvalidPluginExecutionException(OperationStatus.Failed,
"Post Image is required");
Try this:
if(!context.PostEntityImages.Contains("PostImage") ||
context.PostEntityImages["PostImage"] == null)
InvalidPluginExecutionException(OperationStatus.Failed, "Post Image is required");
var postImage = context.PostEntityImages["PostImage"];
Although, I don't think that a PostEntityImage Value will ever be null, if it passes the Contains test you don't really need the null check.
I am somewhat new to expression trees and I just don't quite understand some things.
What I need to do is send in a list of values and select the columns for an entity from those values. So I would make a call something like this:
DATASTORE<Contact> dst = new DATASTORE<Contact>();//DATASTORE is implemented below.
List<string> lColumns = new List<string>() { "ID", "NAME" };//List of columns
dst.SelectColumns(lColumns);//Selection Command
I want that to be translated into code like this (Contact is an entity using the EF4):
Contact.Select(i => new Contact { ID = i.ID, NAME = i.NAME });
So let's say I have the following code:
public Class<t> DATASTORE where t : EntityObject
{
public Expression<Func<t, t>> SelectColumns(List<string> columns)
{
ParameterExpression i = Expression.Parameter(typeof(t), "i");
List<MemberBinding> bindings = new List<MemberBinding>();
foreach (PropertyInfo propinfo in typeof(t).GetProperties(BindingFlags.Public | BindingFlags.Instance))
{
if (columns.Contains(propinfo.Name))
{
MemberBinding binding = Expression.Bind(propinfo, Expression.Property(i, propinfo.Name));
bindings.Add(binding);
}
}
Expression expMemberInit = Expression.MemberInit(Expression.New(typeof(t)), bindings);
return Expression.Lambda<Func<t, t>>(expMemberInit, i);
}
When I ran the above code I got the following error:
The entity or complex type 'Contact' cannot be constructed in a LINQ to Entities query.
I looked at the body of the query and it emitted the following code:
{i => new Contact() {ID = i.ID, NAME = i.NAME}}
I am pretty sure that I should be able to construct the a new entity because I wrote this line explicitly as a test to see if this could be done:
.Select(i => new Contact{ ID = i.ID, NAME = i.NAME })
This worked, but I need to construct the select dynamically.
I tried decompiling a straight query(first time I have looked at the low level code) and I can't quite translate it. The high level code that I entered is:
Expression<Func<Contact, Contact>> expression = z =>
new Contact { ID = z.ID, NAME = z.NAME };
Changing the framework used in the decompiler I get this code:
ParameterExpression expression2;
Expression<Func<Contact, Contact>> expression =
Expression.Lambda<Func<Contact, Contact>>
(Expression.MemberInit(Expression.New((ConstructorInfo) methodof(Contact..ctor),
new Expression[0]), new MemberBinding[] { Expression.Bind((MethodInfo)
methodof(Contact.set_ID), Expression.Property(expression2 = Expression.Parameter(typeof(Contact), "z"), (MethodInfo)
methodof(Contact.get_ID))), Expression.Bind((MethodInfo)
methodof(Contact.set_NAME), Expression.Property(expression2, (MethodInfo)
methodof(Contact.get_NAME))) }), new ParameterExpression[] { expression2
});
I have looked several places to try and understand this but I haven't quite gotten it yet. Can anyone help?
These are some places that I have looked:
msdn blog -- This is exactly what I want to do but my decopiled code soes not have Expression.Call.
msdn MemberInit
msdn Expression Property
stackoverflow EF only get specific columns -- This is close but this seems like it is doing the same thing as if i just use a select off of a query.
stackoverflow lambda expressions to be used in select query -- The answer here is exactly what I want to do, I just don't understand how to translate the decompiled code to
C#.
When I did it last time I projected result to not mapped class (not entity) and it worked, everything else was the same as in your code. Are you sure that not dynamic query like .Select(i => new Contact{ ID = i.ID, NAME = i.NAME }) works?
I can't find good documentation on these operators. Can someone provide some examples of use and explain what they do?
Entity SQL's CREATEREF reference: http://msdn.microsoft.com/en-us/library/bb386880(v=VS.90)
It's used to "Fabricates references to an entity in an entityset". You can also find references of REF and DEREF from the link.
For VS 2010, the reference is: http://msdn.microsoft.com/en-us/library/bb386880(v=VS.100)
Sample from MSDN:
In the example below, Orders and BadOrders are both entitysets of type
Order, and Id is assumed to be the single key property of Order. The
example illustrates how we may produce a reference to an entity in
BadOrders. Note that the reference may be dangling. That is, the
reference may not actually identify a specific entity. In those cases,
a DEREF operation on that reference returns a null.
select CreateRef(LOB.BadOrders, row(o.Id))
from LOB.Orders as o
Sample code of using entity framework SQL:
using (EntityConnection conn =
new EntityConnection("name=AdventureWorksEntities"))
{
conn.Open();
// Create a query that takes two parameters.
string esqlQuery =
#"SELECT VALUE Contact FROM AdventureWorksEntities.Contact
AS Contact WHERE Contact.LastName = #ln AND
Contact.FirstName = #fn";
try
{
using (EntityCommand cmd = new EntityCommand(esqlQuery, conn))
{
// Create two parameters and add them to
// the EntityCommand's Parameters collection
EntityParameter param1 = new EntityParameter();
param1.ParameterName = "ln";
param1.Value = "Adams";
EntityParameter param2 = new EntityParameter();
param2.ParameterName = "fn";
param2.Value = "Frances";
cmd.Parameters.Add(param1);
cmd.Parameters.Add(param2);
using (DbDataReader rdr = cmd.ExecuteReader(CommandBehavior.SequentialAccess))
{
// Iterate through the collection of Contact items.
while (rdr.Read())
{
Console.WriteLine(rdr["FirstName"]);
Console.WriteLine(rdr["LastName"]);
}
}
}
}
catch (EntityException ex)
{
Console.WriteLine(ex.ToString());
}
conn.Close();
}
I need to change the storage schema of the entities on runtime.
I've followed a wonderful post, available here:
http://blogs.microsoft.co.il/blogs/idof/archive/2008/08/22/change-entity-framework-storage-db-schema-in-runtime.aspx?CommentPosted=true#commentmessage
This works perfectly, but only for queries, not for modifications.
Any idea why?
Well, I was looking for this piece of code all around the Internet. In the end I had to do it myself. It's based on Brandon Haynes adapter, but this function is all you need to change the schema on runtime - and you don't need to replace the autogenerated context constructors.
public static EntityConnection Create(
string schema, string connString, string model)
{
XmlReader[] conceptualReader = new XmlReader[]
{
XmlReader.Create(
Assembly
.GetExecutingAssembly()
.GetManifestResourceStream(model + ".csdl")
)
};
XmlReader[] mappingReader = new XmlReader[]
{
XmlReader.Create(
Assembly
.GetExecutingAssembly()
.GetManifestResourceStream(model + ".msl")
)
};
var storageReader = XmlReader.Create(
Assembly
.GetExecutingAssembly()
.GetManifestResourceStream(model + ".ssdl")
);
XNamespace storageNS = "http://schemas.microsoft.com/ado/2009/02/edm/ssdl";
var storageXml = XElement.Load(storageReader);
foreach (var entitySet in storageXml.Descendants(storageNS + "EntitySet"))
{
var schemaAttribute = entitySet.Attributes("Schema").FirstOrDefault();
if (schemaAttribute != null)
{
schemaAttribute.SetValue(schema);
}
}
storageXml.CreateReader();
StoreItemCollection storageCollection =
new StoreItemCollection(
new XmlReader[] { storageXml.CreateReader() }
);
EdmItemCollection conceptualCollection = new EdmItemCollection(conceptualReader);
StorageMappingItemCollection mappingCollection =
new StorageMappingItemCollection(
conceptualCollection, storageCollection, mappingReader
);
var workspace = new MetadataWorkspace();
workspace.RegisterItemCollection(conceptualCollection);
workspace.RegisterItemCollection(storageCollection);
workspace.RegisterItemCollection(mappingCollection);
var connectionData = new EntityConnectionStringBuilder(connString);
var connection = DbProviderFactories
.GetFactory(connectionData.Provider)
.CreateConnection();
connection.ConnectionString = connectionData.ProviderConnectionString;
return new EntityConnection(workspace, connection);
}
The resulting EntityConnection should be passed as a parameter when instantiating the context. You can modify it, so all ssdl models are modified by this function, not only the specified one.
I've managed to resolve this issue by using a brilliant library, located in CodePlex (courtesy of Brandon Haynes), named "Entity Framework Runtime Model Adapter", available here:
http://efmodeladapter.codeplex.com/
I've tweaked it a bit, to fit our needs and without the need of replacing the designer code at all.
So, I'm good.
Thanks anyways, and especially to Brandon, amazing job!
I need import data from postgres database. It by default use schema "public". So I use Entity Framework CTP 4 "Code first". It by default use schema "dbo". To change it in runtime I use:
public class PublicSchemaContext : DbContext
{
protected override void OnModelCreating(System.Data.Entity.ModelConfiguration.ModelBuilder builder)
{
builder.Entity<series_categories>().MapSingleType().ToTable("[public].[series_categories]");
}
public DbSet<series_categories> series_categories { get; set; }
}
It work for select, insert, update and delete data. So next test in pass:
[Test]
public void AccessToPublicSchema()
{
// Select
var db = new PublicSchemaContext();
var list = db.series_categories.ToList();
Assert.Greater(list.Count, 0);
Assert.IsNotNull(list.First().series_category);
// Delete
foreach (var item in db.series_categories.Where(c => c.series_category == "Test"))
db.series_categories.Remove(item);
db.SaveChanges();
// Insert
db.series_categories.Add(new series_categories { series_category = "Test", series_metacategory_id = 1 });
db.SaveChanges();
// Update
var test = db.series_categories.Single(c => c.series_category == "Test");
test.series_category = "Test2";
db.SaveChanges();
// Delete
foreach (var item in db.series_categories.Where(c => c.series_category == "Test2"))
db.series_categories.Remove(item);
db.SaveChanges();
}
Not an answer per se but a followup on Jan Matousek's Create[EntityConnection] method showing how to use from a DbContext. Note DB is the DbContext type passed to the generic repository.
public TxRepository(bool pUseTracking, string pServer, string pDatabase, string pSchema="dbo")
{
// make our own EF database connection string using server and database names
string lConnectionString = BuildEFConnectionString(pServer, pDatabase);
// do nothing special for dbo as that is the default
if (pSchema == "dbo")
{
// supply dbcontext with our connection string
mDbContext = Activator.CreateInstance(typeof(DB), lConnectionString) as DB;
}
else // change the schema in the edmx file before we use it!
{
// Create an EntityConnection and use that to create an ObjectContext,
// then that to create a DbContext with a different default schema from that specified for the edmx file.
// This allows us to have parallel tables in the database that we can make available using either schema or synonym renames.
var lEntityConnection = CreateEntityConnection(pSchema, lConnectionString, "TxData");
// create regular ObjectContext
ObjectContext lObjectContext = new ObjectContext(lEntityConnection);
// create a DbContext from an existing ObjectContext
mDbContext = Activator.CreateInstance(typeof(DB), lObjectContext, true) as DB;
}
// finish EF setup
SetupAndOpen(pUseTracking);
}
I was able to convert the solution from Jan Matousek to work in vb.net 2013 with entity framework 6. I will also try to explain how to use the code in vb.net.
We have a JD Edwards Database which uses different Schema's for each environment (TESTDTA, CRPDTA, PRODDTA). This makes switching between environments cumbersome as you have to manually modify the .edmx file if you want to change environments.
First step is to create a partial class that allows you to pass a value to the constructor of your entities, by default it uses the values from your config file.
Partial Public Class JDE_Entities
Public Sub New(ByVal myObjectContext As ObjectContext)
MyBase.New(myObjectContext, True)
End Sub
End Class
Next create the function that will modify your store schema .ssdl file in memory.
Public Function CreateObjectContext(ByVal schema As String, ByVal connString As String, ByVal model As String) As ObjectContext
Dim myEntityConnection As EntityConnection = Nothing
Try
Dim conceptualReader As XmlReader = XmlReader.Create(Me.GetType().Assembly.GetManifestResourceStream(model + ".csdl"))
Dim mappingReader As XmlReader = XmlReader.Create(Me.GetType().Assembly.GetManifestResourceStream(model + ".msl"))
Dim storageReader As XmlReader = XmlReader.Create(Me.GetType().Assembly.GetManifestResourceStream(model + ".ssdl"))
Dim storageNS As XNamespace = "http://schemas.microsoft.com/ado/2009/11/edm/ssdl"
Dim storageXml = XDocument.Load(storageReader)
Dim conceptualXml = XDocument.Load(conceptualReader)
Dim mappingXml = XDocument.Load(mappingReader)
For Each myItem As XElement In storageXml.Descendants(storageNS + "EntitySet")
Dim schemaAttribute = myItem.Attributes("Schema").FirstOrDefault
If schemaAttribute IsNot Nothing Then
schemaAttribute.SetValue(schema)
End If
Next
storageXml.Save("storage.ssdl")
conceptualXml.Save("storage.csdl")
mappingXml.Save("storage.msl")
Dim storageCollection As StoreItemCollection = New StoreItemCollection("storage.ssdl")
Dim conceptualCollection As EdmItemCollection = New EdmItemCollection("storage.csdl")
Dim mappingCollection As StorageMappingItemCollection = New StorageMappingItemCollection(conceptualCollection, storageCollection, "storage.msl")
Dim workspace = New MetadataWorkspace()
workspace.RegisterItemCollection(conceptualCollection)
workspace.RegisterItemCollection(storageCollection)
workspace.RegisterItemCollection(mappingCollection)
Dim connectionData = New EntityConnectionStringBuilder(connString)
Dim connection = DbProviderFactories.GetFactory(connectionData.Provider).CreateConnection()
connection.ConnectionString = connectionData.ProviderConnectionString
myEntityConnection = New EntityConnection(workspace, connection)
Return New ObjectContext(myEntityConnection)
Catch ex As Exception
End Try
End Function
Make sure that the storageNS namespace hardcoded value matches the one used in your code, you can view this by debugging the code and examining the storageXML variable to see what was actually used.
Now you can pass a new schema name, and different database connection info at runtime when you create your entities. No more manual .edmx changes required.
Using Context As New JDE_Entities(CreateObjectContext("NewSchemaNameHere", ConnectionString_EntityFramework("ServerName", "DatabaseName", "UserName", "Password"), "JDE_Model"))
Dim myWO = From a In Context.F4801 Where a.WADOCO = 400100
If myWO IsNot Nothing Then
For Each r In myWO
Me.Label1.Text = r.WADL01
Next
End If
End Using
These were the .net libraries used:
Imports System.Data.Entity.Core.EntityClient
Imports System.Xml
Imports System.Data.Common
Imports System.Data.Entity.Core.Metadata.Edm
Imports System.Reflection
Imports System.Data.Entity.Core.Mapping
Imports System.Data.Entity.Core.Objects
Imports System.Data.Linq
Imports System.Xml.Linq
Hope that helps anyone out there with the same issues.
I had a lot of problems getting this to work when using EF6 with an OData Data Service, so I had to find an alternate solution. In my case, I didn't really need to do it on the fly. I could get away with changing the schema when deploying to some test environments, and in the installer.
Use Mono.Cecil to rewrite the embedded .ssdl resources straight in the DLLs. This works just fine in my case.
Here is a simplified example of how you can do this:
var filename = "/path/to/some.dll"
var replacement = "Schema=\"new_schema\"";
var module = ModuleDefinition.ReadModule(filename);
var ssdlResources = module.Resources.Where(x => x.Name.EndsWith(".ssdl"));
foreach (var resource in ssdlResources)
{
var item = (EmbeddedResource)resource;
string rewritten;
using (var reader = new StreamReader(item.GetResourceStream()))
{
var text = reader.ReadToEnd();
rewritten = Regex.Replace(text, "Schema=\"old_schema\"", replacement);
}
var bytes = Encoding.UTF8.GetBytes(rewritten);
var newResource = new EmbeddedResource(item.Name, item.Attributes, bytes);
module.Resources.Remove(item);
module.Resources.Add(newResource);
}
I have an entity with two fk's. I've been trying to insert a record to the database without success. This are the approaches I've used:
valuePaymentBetToAdd.BetType = db.BetTypes.First(betType => betType.Id == valuePaymentBetToAdd.BetType.Id);
valuePaymentBetToAdd.Lottery = db.Lotteries.First(lotto => lotto.Id == valuePaymentBetToAdd.Lottery.Id);
In this case the second object gets assigned but when calling the SaveChanges method I get an error saying that the properties of the Lottery object were null.
valuePaymentBetToAdd.BetTypeReference.EntityKey = new EntityKey(db.DefaultContainerName + ".BetType", "Id", valuePaymentBetToAdd.BetType.Id);
valuePaymentBetToAdd.LotteryReference.EntityKey = new EntityKey(db.DefaultContainerName + ".Lottery", "Id", valuePaymentBetToAdd.Lottery.Id);
In this case I get another weird error. When the object is being added to the collection.
The object could not be added or attached because its EntityReference has an EntityKey property value that does not match the EntityKey for this object.
Am I missing something in this case?
Try setting the EntityReference like this:
valuePaymentBetToAdd.BetTypeReference.EntityKey = b.BetTypes.First(betType => betType.Id == valuePaymentBetToAdd.BetType.Id).EntityKey;
It works for me
How about creating a stub object for BetType and Lottery where you set only the Id property, and then attach those to their respective EntitySets, and then setting these objects on you Bet object, and save - something like:
Lottery lottery = new Lottery() { Id = valuePaymentBetToAdd.Lottery.Id };
BetType betType = new BetType() { Id = valuePaymentBetToAdd.BetType.Id };
MyContext.AttachTo("Lottery", lottery);
MyContext.AttachTo("BetType", betType);
valuePaymentBetToAdd.Lottery = lottery;
valuePaymentBetToAdd.BetType = betType;
MyContext.AddToBet(valuePaymentBetToAdd);
MyContext.SaveChanges();