navigation-properties Questions
5
Solved
I have the next enitities:
public class MyEntity
{
public virtual int Id { get; set; }
public virtual MySecondEntity SecondEntity { get; set; }
}
public class MySecondEntity
{
public virtual in...
Muddleheaded asked 5/2, 2014 at 16:34
4
Solved
I was wondering why there are separate methods for populating navigation properties.
If I work on an entire set, i can call Include on either a property or a collection.
However, if I work on a s...
Ford asked 6/8, 2013 at 5:14
1
I've configured my DbContext (EF Core 5.0) with the following code:
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<User>()
.HasMany(p => p.Roles...
Lox asked 24/3, 2021 at 22:43
4
Solved
While working in a project I saw a strange behaviour I cannot understand with the loading of navigation properties.
Here is a small example that reproduces this "problem".
I want to load a Year...
Olin asked 28/4, 2014 at 12:51
1
I am using Entity framework v 6.1.1 in my application.
My database has 2 tables User, Location.
User table
-----------
UserID
HomeCityId(FK -> LocationId)
CurrentCityId(FK -> LocationId)
Lo...
Present asked 25/10, 2014 at 13:27
2
Solved
The usual approach for modeling 1-n relations with EntityFramwork (Code First) is to use virtual collection properties like:
class Project {
public virtual ICollection<Remark> Remarks { get...
Chrisom asked 5/2, 2013 at 14:54
6
Solved
I had seen some books(e.g programming entity framework code first Julia Lerman) define their domain classes (POCO) with no initialization of the navigation properties like:
public class User
{
pu...
Bandler asked 24/12, 2013 at 8:39
5
Solved
As I remember in EF navigation property should be virtual:
public class Blog
{
public int BlogId { get; set; }
public string Name { get; set; }
public string Url { get; set; }
public stri...
Babcock asked 26/1, 2017 at 19:14
1
Solved
I am using Entity Framework (with a code-first approach) and the database is created successfully with the expected foreign keys and unique key constraints.
I have those two model classes:
publi...
Domel asked 31/3, 2018 at 13:16
3
I've got POCO domain entities that are persisted using Entity Framework 5. They are obtained from the DbContext using a repository pattern and are exposed to a RESTful MVC WebApi application throug...
Carcinomatosis asked 3/1, 2013 at 19:6
1
Solved
There is an interesting feature exists in entity framework core:
Entity Framework Core will automatically fix-up navigation properties
to any other entities that were previously loaded into th...
Bohman asked 1/6, 2017 at 0:15
2
Solved
Is it somehow possible to define navigation properties in EFCore with private or protected access level to make this kind of code work:
class Model {
public int Id { get; set; }
virtual protecte...
Leander asked 31/5, 2017 at 12:44
1
Solved
Using EF Core 1.1.0
I have a model that has collections that themselves have collections.
public class A {
public string Ay {get;set;}
public List<B> Bees {get;set;}
}
public class B {...
Encarnacion asked 8/1, 2017 at 3:12
3
Solved
Let's suppose that we have this situation:
Tables in database:
Country (id, country_name), Person (id, login), CountryManager (id_country, id_person), CountryStakeholder (id_country, id_person)
...
Honeymoon asked 5/11, 2014 at 13:0
4
I'm working on an EF 5 Code-First solution and I am trying to update an existing entity with a modified one using the Repository pattern:
public void UpdateValues(T originalEntity, T modifiedEnti...
Carmen asked 26/7, 2013 at 16:44
2
Solved
When I use the .Include syntax in EF6, reverse navigation properties are always loaded. Is there a way to turn that off? Here is a sample query.
private static IQueryable<Account> GetAccount...
Salesgirl asked 28/8, 2015 at 14:46
1
I have the following customer class:
public class Customer
{
public long Id { get; set; }
public virtual ICollection<Order> Orders { get; set; }
}
My database has Customers and Orders ...
Candi asked 20/10, 2014 at 14:41
4
I'm trying to put together a simple toy project using Entity Framework, WebAPI, OData, and an Angular client. Everything is working fine, except the navigation property that I have put on one of my...
Perigon asked 20/5, 2015 at 17:56
1
Solved
How do I configure Entity Framework using fluent configuration to behave the same way that I would do this with attributes:
public class Product
{
public int? ParentId { get; set; }
[ForeignKey(...
Rondo asked 15/1, 2015 at 17:8
2
Solved
Using EF 5, Code First.
I'd like to model my entities such that the navigation properties only exist on one side of the relationship.
So if I have a table Widget, and a table WidgetType:
public ...
Swanee asked 29/5, 2013 at 15:17
1
Solved
I have following POCO class being used in EF 6.x.
My question: Why is the navigation property of 'Posts' under 'Blog' entity declared as virtual?
public class Blog
{
public int BlogId { get; s...
Eusporangiate asked 7/9, 2014 at 22:52
3
Solved
sorry for my english, I'll try to be short and concise.
I have to tables "ALUMNOS" and "MATERIAS". In SQL exist another table "ALUMNOS BY MATERIAS". I know this is not necessary in EF because exis...
Pressley asked 10/6, 2014 at 12:24
1
Solved
Let's make a case to explain my problem.
MyTable1
+id
+myTable2Id
MyTable2
+id
MyView1
+id
+myTable2Id
MyView1 exists in the case, from data from the MyTable1. Now i want to creat...
Bortz asked 10/4, 2014 at 20:32
2
Solved
I generated an Entity Framework Model (4.0) from my database. I did not design the database and do not have any control over the schema, but there are a few tables that do not have foreign key cons...
Kosygin asked 16/12, 2010 at 22:10
1
Sometimes entity framework generates awful navigation property names. Using the database first approach, what is the best way to fix that?
I am able to edit the t4 templates to my liking, but how ...
Goodfellowship asked 22/7, 2013 at 18:0
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