A way to configure Entity Framework beyond its conventions with a method chaining API
Use the tag for questions that ask about:
- Model-wide settings
- Property mapping
- Type mapping
- Relationships
The EF-Fluent API can be used in both c# and VB.NET.
Questions tagged [ef-fluent-api]
833 questions
-1
votes
1 answer
Directing context to use custom named join table for many to many entity relationship
I have 2 entities with a many to many relationship:
[Table("Student", Schema = "School")]
public class Student
{
public long ID { get; set; }
public virtual List Teachers { get; set; }
//...
}
…
Ben Kennedy
- 11
- 4
-1
votes
1 answer
Unable to insert record into join/lookup/link table (EF/FluentAPI/MVC)
Alright so I'm a bit stuck at the moment. We've creating an MVC application using EF, fluent api, etc. and I'm having some trouble getting new records into a join table at the moment.
DB Table…
makinitmine
- 94
- 2
- 10
-2
votes
1 answer
How do you name a many-to-many relationship table using Fluent Api?
I have created a many-to-many relationship, and the name the table (the one that has the Id of both records / objects) has doesn't appeal to me.
So how can I name that table using Fluent Api? By a usual table I'd use ToTable("Name"), but how do I do…
Web Developer
- 333
- 4
- 17
-2
votes
1 answer
ASP.NET Core Entity Framework get related data object
Every time I am trying to get a related object I get error
Object reference not set to an instance of an object
Relevant code:
public class Project
{
public int ProjectId { get; set; }
public string ProjName { get; set; }
public…
Bing Han
- 545
- 1
- 6
- 10
-2
votes
1 answer
Fluent Api - Person and Creation
I have a problem.I have two classes that I use in Entity Framework.
First one is a person Class:
With int id, string name and action creation(incl. Foreign Key).
Second one is a action class.
With id , time and a person(incl. Foreign Key).
When I…
user3460436
- 1
- 1
-2
votes
1 answer
how can create Unique Constraint with multi column with entityframework
I'm use Entityframework Code First, and an EntityTypeConfiguration using fluent API.
how can create Unique Constraint with multi column.
for example i have a table with below field
Id
CompanyId
Code
Name
i want set Code column to unique , per…
A.R
- 3
- 2
-3
votes
1 answer
how can i change table name by fluent API of entity framework code first in c#?
I want to change table name of my c# class by fluent API that it'll must be map on database (SQL Server), and I am using Entity Framework code first as ORM in my project.
sajad jafari
- 11
- 5
-3
votes
2 answers
My database entity has a generic base BaseEntity, but how to map Id value of base entity to database entity?
How can I interchangeably use entity base Id or database column Id
public partial class Orders : EntityBase
{
protected Orders() { }
public int Orderid { get; set; }
public override int Id { get => base.Id; set => base.Id =…
HydTechie
- 797
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