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
0
votes
1 answer
ScriptIgnore Attribute Being Ignored
I'm attempting to serialize a DTO however its falling down, claiming a circular reference issue - which is definitely valid. I have the following entities:
public class User {
[Key]
public int UserID { get;set; }
public string…
weblar83
- 681
- 11
- 32
0
votes
1 answer
0..1 to many relationship with Fluent API with EntityFramework Core
I need to declare an 0..1 to many relationship using Fluent API with EntityFramework Core. Right now I have a 1 to many relationship and I cannot figure out how to change that to a 0..1 to many.
modelBuilder.Entity- ()
.HasOne(c =>…
BeebFreak
- 111
- 1
- 6
0
votes
1 answer
Many to Many relation in EF made without links to the entity
I would like to shift from the common pattern in many to may relation using implicit joint table and instead I want to use the joint table explicitely and implement a kind of lazy load of many-to-many dependent entity.
This is framed by the design…
Dmitry Dyachkov
- 1,715
- 2
- 19
- 46
0
votes
1 answer
Error adding entities to database
I'm getting the following exception message:
An error occurred while saving entities that do not expose foreign key
properties for their relationships. The EntityEntries property will
return null because a single entity cannot be identified as…
ddeamaral
- 1,403
- 2
- 28
- 43
0
votes
1 answer
Why can't I have property of type Type in my model for Entity Framework?
I'm setting up a model for a project and everything works as expected, except for the change below. I thought it'd be neat to specify the type as Type instead of its description as string.
namespace DataBase.Entities
{
public class Lock
{
…
Konrad Viltersten
- 36,151
- 76
- 250
- 438
0
votes
1 answer
how to configure cascade delete with EF Fluent API
I have the following classes and EF convention created the tables fine - all good. Now I want to configure cascade delete on the ToDoList (so that when I delete a ToDoList, all the ToDoItems and UserToDoLists also gets deleted automatically). Must…
lee23
- 409
- 1
- 3
- 10
0
votes
1 answer
Entity Framework Relation with null or 0 Key
I am trying to work with an existing database and my ability to make changes are difficult. I am hoping to do some transitional work and being an ORM in however, i have hit an issue.
I am using EF Fluent API (closer to the NHibernate way of doing…
finite8
- 11
- 2
0
votes
1 answer
How to configure Domain Classes to use ObservableCollection using EF?
I have started using Entity Framework Code First modeling technique and have seen many examples of implementing one to many (1-N) relationship using DataAnnotation and FluentAPI but all examples are using ICollection while modeling domain classes. I…
Furqan Safdar
- 16,260
- 13
- 59
- 93
0
votes
1 answer
Configure 1 to 1 and many to many in 3 Entities using Fluent API
Am new to fluent API kindly bear with me. I have three entities Student, Address and Course, Student and Address should be 1:1 relationship and Student and Courses should be m:m(many to many).
My question is should i define Courses and Address…
Michael Mburu
- 460
- 1
- 4
- 11
0
votes
1 answer
EF6 Fluent Mapping the incorrect keys for joins
I am trying to get EF6 Fluent Mappings to work for my current project. I have the following Order mapping:
public class OrderMap : EntityTypeConfiguration
{
public OrderMap()
{
this.ToTable("OE_Orders");
…
Carson
- 1,169
- 13
- 36
0
votes
1 answer
ASP.NET-Identity OnModelCreating Modelbuilder Generating Duplicate Foreign Keys
I have an ASP MVC 5 application but the model builder is creating duplicate foreign keys for the IdentityUserRole, IdentityUserClaim and IdentityUserLogin tables.
E.g in the generated migration table below has RoleId as well as…
adam78
- 9,668
- 24
- 96
- 207
0
votes
1 answer
EF6 M:M Without Bridge/Junction Class, Unconventional FKs
Trying to wrap my head around M:M with EF6. I have an existing database and am manually handling the models in code, using the fluent API on model creating.
As I've read and as makes sense to me, when a db schema contains a junction table without…
jleach
- 7,410
- 3
- 33
- 60
0
votes
0 answers
How assign not primary key of table as foreign key of another table
I have two tables: User and Profile
public class User
{
public string Id { get; set; }
public string UserName { get; set; }
public string Email { get; set; }
public string Password { get; set; }
public Profile Profile { get;…
Grigory
- 1
- 1
- 3
0
votes
0 answers
aggregate root with nested list to one table with fluent api
I have an aggregate root: Report.
This Report entity has a list of Order entities.
How do I save the Report, and get fluent api to insert one record in the database table for each order?
Report Entity: {Orders, ReportId}
Order Entity: {Order Id,…
Steve's a D
- 3,801
- 10
- 39
- 60
0
votes
2 answers
Two tables that have keys to each other on Entity Framework
I have the following classes:
public class Condition
{
public int Id {get;set; }
public Condition ParentCondition {get;set;}
public Action ParentAction {get;set;}
public string Whatever {get;set;}
}
public class Action
{
…
Ole Albers
- 8,715
- 10
- 73
- 166