In the previous section, we have seen that Code-First automatically creates a Primary Key in each table. The default convention for primary key is that Code-First would create a primary key for a property if the
二、主键约定Primary Key Convention 如果类中的属性(Property)名称为ID(不区分大小写)或ClassNameID(类名 +ID),Code First则推断这个属性为主键。如果主键属性的类型为数字型或GUID则会被当成标识列(Identity Column) publicclassDepartment {//Primary keypublicintID {get;set; }//Primary keypublicintDepartmentID...
One of the things that Type level conventions can be really useful for is changing the table naming convention, either to map to an existing schema that differs from the EF default or to create a new database with a different naming convention. To do this we first need a method that can...
2012年12月11日,Entity Framework已经发布了Entity Framework 6 Alpha2,因项目需要,目前已使用了其中的两个特性,今天就来介绍一下第一个特性:全局性地自定义Code First约定(Custom Code First Conventions)。 应用场景 场景一:EF Code First默认使用类名作为表名,如果我们需要给表名加个前缀,例如将类名Category映射...
The latest preview of Code First allows you to describe a model using C# or VB.Net classes. The basic shape of the model is detected by convention and then a fluent API can be used to further refine your model.We recently posted about our plans to support Data Annotations as another way...
以下示例删除 PluralizingTableNameConvention。 C# 复制 public class SchoolEntities : DbContext { . . . protected override void OnModelCreating(DbModelBuilder modelBuilder) { // Configure Code First to ignore PluralizingTableName convention // If you keep this convention, the generated tables // ...
Code First 使你能够使用 C# 或 Visual Basic .NET 类来描述模型。 通过使用约定可以检测模型的基本形状。 约定是一组规则,用于在使用 Code First 时自动配置基于类定义的概念模型。 约定在 System.Data.Entity.ModelConfiguration.Conventions 命名空间中定义。
Entity Framework 4.1 Code First 学习之路(一) 前言 公司最近的项目决定使用EF。作为EF的完全新手,写一些学习中的经历和解决的办法,希望老鸟们能不吝赐教。 sample程序使用EF 4.1RC+Spring.Net 1.3.1+ASP.NET MVC3。在CodePlex开源: http://efsample.codeplex.com/...
{ get; set; } protected override void OnModelCreating(System.Data.Entity.ModelConfiguration.ModelBuilder modelBuilder) { modelBuilder.Conventions.Remove<IncludeMetadataConvention>(); modelBuilder.Entity<Genre>().ToTable("Genre"); modelBuilder.Entity<Album>().ToTable("Album"); base.OnModelCreating(...
Without the DestinationId foreign key property, Code First convention allowed Lodging.Destination to be optional, meaning you could add a Lodging without a Destination. If you check back to Figure 2-1 in Chapter 2, you’ll see that the Destination_DestinationId field in the Lodgings table is ...