protectedoverridevoidOnModelCreating(ModelBuilder modelBuilder){foreach(varentityinmodelBuilder.Model.GetEntityTypes()){modelBuilder.Entity(entity.Name,builder=>{#ifDEBUG//设置表的备注builder.ToTable(t=>t.HasComment(GetEntityComment(entity.Name)));List<string>baseTypeNames=new();varbaseType=entity.Cl...
Entity types can be mapped to database views using the Fluent API. Note EF will assume that the referenced view already exists in the database, it will not create it automatically in a migration. C# modelBuilder.Entity<Blog>().ToView("blogsView", schema:"blogging"); ...
Inherited from: MetadataBase MobileOfflineFilters Edm.String ModifiedOn Edm.DateTimeOffset When the table definition was last modified. ObjectTypeCode Edm.Int32 The entity type code. OwnerId Edm.Guid OwnerIdType Edm.Int32 OwnershipType OwnershipTypes The ownership type for the entity. Owning...
The model above is mapped to the following database schema: Storing owned types in separate tables Also unlike EF6 complex types, owned types can be stored in a separate table from the owner. In order to override the convention that maps an owned type to the same table as the owner, you...
Parameter data types must now be mapped between the entity and Oracle database. Select EMPLOYEE_ID for ID and SALARY for SAL from the drop down lists. 5. Type in the highlighted code below or copy the code from the Programcs.txt from the section labeled "LINQ using lambda expressions --...
We created EDM for existing database in the previous section. As you have learned in the previous section that EDM contains entities for each table in the database. There are two types of Entities in Entity Framework 5.0/6.0: POCO entity and dynamic proxy entity. ...
The Entity Framework abstracts the logical database structure using a conceptual layer, a mapping layer, and a logical layer. In this column, I review the purpose of each of these layers. I also introduce EntityClient and a new language, Entity SQL, that can interact with the conceptual laye...
At the heart of the Entity Framework is the Entity Data Model (EDM). The EDM defines the entity types, relationships and containers that developers interact with via code. The Entity Framework maps these elements onto the storage schema exposed by a relational database. The EDM is exposed to...
Microsoft.EntityFrameworkCore.Sqlite.NetTopologySuite SQLite support for spatial types Microsoft.EntityFrameworkCore.Cosmos Database provider for Azure Cosmos DB Microsoft.EntityFrameworkCore.InMemory The in-memory database provider Microsoft.EntityFrameworkCore.Tools EF Core PowerShell commands for the Visual...
The column length for String-based discriminator types. This element is ignored for non-String discriminator types. The default is 31. This element is optional. The javax.persistence.DiscriminatorType enumerated type is used to set the type of the discriminator column in the database by setting ...