What is EntityTypeConfiguration?
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What is EntityTypeConfiguration?
Allows configuration to be performed for an entity type in a model. An EntityTypeConfiguration can be obtained via the Entity method on DbModelBuilder or a custom type derived from EntityTypeConfiguration can be registered via the Configurations property on DbModelBuilder.
How do you set a foreign key in an entity?
The ForeignKey attribute is used to configure a foreign key in the relationship between two entities in EF 6 and EF Core. It overrides the default conventions. As per the default convention, EF makes a property as foreign key property when its name matches with the primary key property of a related entity.
How do I use code first in an existing database?
To use code-first for an existing database, right click on your project in Visual Studio -> Add -> New Item.. Select ADO.NET Entity Data Model in the Add New Item dialog box and specify the model name (this will be a context class name) and click on Add. This will open the Entity Data Model wizard as shown below.
What is DbModelBuilder in C#?
DbModelBuilder is used to map CLR classes to a database schema. This code centric approach to building an Entity Data Model (EDM) model is known as ‘Code First’.
What is difference between EF and EF core?
The following tables compare the features available in EF Core and EF6….Creating a model.
| Feature | EF6.4 | EF Core |
|---|---|---|
| Spatial data | Yes | 2.2 |
| Model format: Code | Yes | 1.0 |
| Create model from database: Command line | Yes | 1.0 |
| Update model from database | Partial | On the backlog (#831) |
How do I set primary key in Entity Framework?
Configuring a primary key By convention, a property named Id or Id will be configured as the primary key of an entity. Owned entity types use different rules to define keys. You can configure a single property to be the primary key of an entity as follows: Data Annotations.
How do I convert code first to database first?
There is no way to convert your code-first classes into database-first classes. Creating the model from the database will create a whole new set of classes, regardless of the presence of your code-first classes. However, you might not want to delete your code-first classes right away.
What is the difference between ef6 and EF core?
EF 6 is a stable and mature ORM while EF Core is relatively new. Microsoft rebuilt EF Core from the ground up and removed many of the internal dependencies and providers that EF 6 had (like SQLClient). In the long run, that will make EF Core much more extensible and lighter weight.
Is LINQ an ORM?
LINQ to SQL is an object-relational mapping (ORM) implementation that allows the direct 1-1 mapping of a Microsoft SQL Server database to . NET classes, and query of the resulting objects using LINQ.
What is difference between Entity Framework and MVC?
MVC is framework mainly concentrates on how you deliver a webpage from server to client. Entity framework is an object relational mapper which helps you to abstract different types of databases (MSSQL,MySQL etc) and helps querying objects instead of having sql strings in our project.
