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
3
votes
2 answers
Using same C# Poco classes with in mongodb and Entityframework
My Domain Classes is as follow:
public class Author
{
public int Id { get; set; }
public string Name { get; set; }
public IList Posts { get; set; }
}
public class Blog
{
public int Id { get; set; }
public string Name {…
mesut
- 2,099
- 3
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3
votes
3 answers
Followers Schema in Entity Framework
I am making an App which will have the Following functionality. But I am stuck at this. I have come up like this.
public class User
{
public int Id { get; set; }
public ICollection Followers { get; set; }
public ICollection…
Hamza Baig
- 666
- 1
- 7
- 13
3
votes
1 answer
DDD with MongoDB
I can't believe I didn't find good article about it. So it might be a 1000 times asked question.
I'm writing a sample, which consists of Nancy MVC, plus Service Layer, Core Layer, DAL. Where DAL use MongoDB. What I'm trying to achieve is to…
Valentyn Vynogradskiy
- 633
- 1
- 6
- 22
3
votes
2 answers
EF 6 Codefirst -Setting default value for a property defined in base class using fluent API
I have a base class which has audit properties like
public abstract class BaseModel
{
[Column(Order = 1)]
public long Id { get; set; }
public long CreatedBy { get; set; }
public DateTime CreatedDate { get; set; }
public long…
Abi P
- 1,410
- 3
- 22
- 36
3
votes
2 answers
How to set default length on all fields in entity framework fluent api?
Is it possible to set default length of all string fields (unless I say otherwise)?
At the moment it really bugs me to go and add something like
modelBuilder.Entity().Property(x => x.YardLine).HasMaxLength(256);
to each and every string…
Tanuki
- 717
- 1
- 9
- 24
3
votes
2 answers
When an entity has more than one 0..1:n relationships to another entity, how to define them using Fluent API?
I'm working on an Azure Mobile Service and in my model I have an entity Message, which is related to itself following this statement:
A Message may have a parent Message, a Message may be the parent to many Messages.
My class got defined as…
Uriel Arvizu
- 1,876
- 6
- 37
- 97
3
votes
1 answer
Creating a UNIQUE Filtered Index for NULL values on Entity Framework
I'm trying to create a table that has a UNIQUE Filtered Index for NULL values (eg. Allow Null values to be duplicates) using Entity Framework.
I am using Fluent API and have this entity property:
modelBuilder.Entity().Property(c =>…
Cobo
- 118
- 1
- 7
3
votes
1 answer
How to get IdentityUser roles' names in View?
Using ASP.NET MVC5 user identity, I am trying to display IdentityUser's role names in view.
It seems like Identity user has Roles property, which represent collection of IdentityUserRole, instead of IdentityRole. The difference is IdentityUserRole…
Annie
- 3,090
- 9
- 36
- 74
3
votes
1 answer
No key defined for key on multiple columns
I am using C# and Entity Framework. I want to define a key for the SimulationParameter object as a combination of three columns (Name, StudyId, SimulationId). I don't need an ID column, since the combination of those three elements will always be…
Etienne Noël
- 5,988
- 6
- 48
- 75
3
votes
1 answer
Extend Entity framework 5 entity using partial class and map it to existing other entities
I haven't seen question like this been raised. So, I created one for EF fluent api developers and nopcommerce plugin developers.
Here's what I'm trying to do:
I have a product entity and can used by EF to generate database. I want to extending the…
Yuxuan Xue
- 43
- 1
- 6
3
votes
2 answers
Entity Framework - adding an existing entity to one to one relationship in seed method
My Domain Classes:
public class Address
{
[Key]
public virtual string AddressId { get; set; }
public virtual Site Site { get; set; }
}
public class Site
{
[Key]
public virtual int SiteId { get; set; }
public virtual…
Para Kan
- 121
- 3
- 12
3
votes
1 answer
Foreign key issues in EF6 CF
Excuse me for being a noob with EF when it comes to code first. My problem is I don't want to add foreign key properties to the model and according to MSDN this presents no problem using the fluent API, however I can not figure out the correct use…
weagle08
- 1,763
- 1
- 18
- 27
3
votes
1 answer
Change Constraint Names using an Entity Framework Migration
I have built a database using EF Codefirst (In an MVC4 application).
I've since learnt, that an external tool that will access this database has name-length limitations for columns & constraints.
Column names must be <=20 chars
Constraint names…
Mike
- 5,568
- 11
- 31
- 45
2
votes
0 answers
When I set two collections of the same entity entituy core tries to use the default column name
First I will expose the code that reproduces the problem. Then I will explain the problem.
I have two entities, Employee and ContactForm (address, email, telephone...):
public class Employee
{
public long Id { get; set; }
public string…
Álvaro García
- 18,114
- 30
- 102
- 193
2
votes
0 answers
Configure Many-To-Many EF Relationship Between Separate Aggregates Without Using Navigation Lists
I have two entities from separate aggregate groups that have a many-to-many relationship:
public class ClientNotificationMethod
{
public int ID { get; private set; }
private ICollection _personIDs;
//public virtual…
jmagen
- 41
- 3