Entity Framework Graph Diff - Knowledge Base (KB)

Update entity graph Ids with Db generated Ids in Disconnected environment(EF)

I'm working with ...EF6 code first... in a ...WinForm... project. I used following method for reading entities from ...Db..., updating them and then save back them to ...Db...:...Read Entity graph using ...Linq to entities...(after reading the ...DbContex...

Updating a many-to-many relation using GraphDiff cause an error

I'm using ...EF code first 6.1... with ....NET 4... in my application and have following classes in my model(I cut other unrelated parts of diagram. e.g ...Permission... has other navigations): ...My business logic works with detached entities so I'm usin...

Setting association to foreign key to inherited object using graphdiff and Entity Framework

I have a issue with updating value on a foreign key which is inheriting from another class. I am working with detached object in Entity Framework, so I'm using graphdiff to handle it....I've simplified the code to make it easier to read...Project class:..

Empty rows insertion in Many-to-One and Many-to-Many relationships in GraphDiff

I am using GraphDiff, along with the latest version of the Entity Framework, following the code-first approach....I am trying to update a ...Food... entity this way:...public void Update(Food food) { using (var db = new DatabaseMappingContext()) {...

How to update related entities using GraphDiff?

I have the following model:...public class Customer { public int Id {get; set;} public string Name {get; set;} public int AddressId {get; set;} public virtual Address Address {get; set;} public virtual ICollection<CustomerCategory> Cat...

Conditional mapping with graphdiff

I have following entities in my ...DbContext...:...public class A { public A() { Bs = new List<B>(); } public ICollection<B> Bs { set; get; } } ...Sometimes I Want to update ...a... graph:...var a = dbContext.As .AsNoTrackin...

The relationship could not be changed because one or more of the foreign-key properties is non nullable

I get following error during update with EF:...The operation failed: The relationship could not be changed because one or more of the foreign-key properties is non-nullable. When a change is made to a relationship, the related foreign-key property is set ...

When to disable proxy generation and use AsNoTracking?

In my WebApi project, I use EF6, follow Uow and generic repository patterns, and I also map my models to dto's and vice-versa. ...Currently I set the following when creating the ...dbContext...:...this.Configuration.LazyLoadingEnabled = false; this.Config...

Delete Owned Entities 2 level depth using GraphDiff

I am using Entity Framework code first (version 6) and GraphDiff in my MVC project....here is some entities which map some tables in database....public class CommunicationPlan { public int CommunicationPlanID { get; private set; } [Owned] pu...