Questions tagged [entity-framework-core]
For questions about Entity Framework Core (EF Core) for .NET Core. Please also add a version-specific [ef-core-xx] tag, when applicable. Note that Entity Framework for .NET Framework is an older, different product that fits the [entity-framework] tag.
entity-framework-core
1,948
questions
175
votes
9
answers
131k
views
Filtering on Include in EF Core
I'm trying to filter on the initial query. I have nested include leafs off a model. I'm trying to filter based on a property on one of the includes. For example:
using (var context = new ...
- 8,204
264
votes
22
answers
336k
views
Raw SQL Query without DbSet - Entity Framework Core
With Entity Framework Core removing dbData.Database.SqlQuery<SomeModel> I can't find a solution to build a raw SQL Query for my full-text search query that will return the tables data and also ...
- 2,823
44
votes
2
answers
33k
views
EF Core returns null relations until direct access
I have some models like those below:
public class Mutant
{
public long Id { get; set; }
...
// Relations
public long OriginalCodeId { get; set; }
public virtual OriginalCode ...
- 4,295
4
votes
3
answers
2k
views
Can I reuse code for selecting a custom DTO object for a child property with EF Core?
When querying using Entity Framework Core, I am using expressions to convert to DTO objects, which works well for the object, and any child collections.
A simplified example:
Model:
public class Model
...
- 95
113
votes
21
answers
264k
views
How to run stored procedures in Entity Framework Core?
I am using EF Core 1.0 in an ASP.NET Core App. Can you please point me to the proper way of executing stored procedures? The old method with ObjectParameters and ((IObjectContextAdapter)this)....
- 25.2k
24
votes
2
answers
6k
views
EF Core Second level ThenInclude missworks
Assume having these models first:
Method that has one OriginalCode
OriginalCode that has many Mutants
Mutant that has many ParseSubTrees
Now when querying on Method I want the other being loaded. So ...
- 4,295
56
votes
2
answers
57k
views
Entering keys manually with Entity Framework
I'm trying to use Entity Framework code first for a simple database project and I run into a problem I simply cannot figure out.
I noticed EF was setting the ID for my tables automatically ...
- 597
212
votes
10
answers
204k
views
Get SQL code from an Entity Framework Core IQueryable<T>
I am using Entity Framework Core and I need to see which SQL code is being generated. In previous versions of Entity Framework I could use the following:
string sql = ((System.Data.Objects....
- 38.6k
57
votes
10
answers
108k
views
Dynamically change connection string in Asp.Net Core
I want to change sql connection string in controller, not in ApplicationDbContext. I'm using Asp.Net Core and Entity Framework Core.
For example:
public class MyController : Controller {
private ...
- 5,623
33
votes
4
answers
25k
views
Entity Framework Core 2.0.1 Eager Loading on all nested related entities
I have a simple problem, but cant seem to find a way around it. I am using Entity Framework Core version 2.0.1 and want to eager load all my entities by default.
Example:
public class Order
{
...
- 2,033
152
votes
19
answers
246k
views
Entity Framework Core: `SqlNullValueException: Data is Null.` How to troubleshoot?
I am using Entity Framework Core in an ASP.NET Core application and Controller action and I haven't changed something to the working code nor to the database but I can't tell what is the query ...
- 8,785
8
votes
1
answer
14k
views
Avoid or control circular references in Entity Framework Core
I really am done with this, but at least I want to know what's going on. Here we go:
My project is an ASP.NET Core Web Application with Code First Entity Framework Core and an Angular frontend.
I want ...
- 101
227
votes
22
answers
296k
views
.NET Core 3.0 possible object cycle was detected which is not supported
I have two entities that are related as one-to-many:
public class Restaurant {
public int RestaurantId {get;set;}
public string Name {get;set;}
public List<Reservation> Reservations {...
- 2,373
60
votes
15
answers
86k
views
.NET Core 2.1 Identity get all users with their associated roles
I'm trying to pull out all my Identity users and their associated roles for a user management admin page. I thought this would be reasonably easy but apparently not. I've tried following the following ...
- 3,894
26
votes
1
answer
9k
views
Many-to-many self referencing relationship
I am new in EF. And I ran into a problem with creation many-to-many self referencing relation.
I've tried to use solution from: Entity Framework Core: many-to-many relationship with same entity
my ...
- 363