实体框架 4 POCO 生成

Question

好的...所以我已经使用 EF4 创建了我的模型。伟大的！

然后我关闭了代码生成并下载了此扩展： http://visualstudiogallery .msdn.microsoft.com/23df0450-5677-4926-96cc-173d02752313 （POCO 实体生成器）。惊人的！

运行它，它会生成我的所有课程。这就是我所要做的一切吗？它似乎有效，我的存储库获取对象并持久保存到数据库。

请看一下下面的代码，让我知道我是否走在正确的轨道上。

** 示例代码 **

控制器：

Namespace Controllers
    Public Class HomeController
        Inherits System.Web.Mvc.Controller

        Function Index() As ActionResult
            Return View(New Models.HomeModel)
        End Function

    End Class
End Namespace

模型：

Namespace Models
    Public Class HomeModel

        Private _Repository As Titan.Business.Repositories.ICustomerRepository
        Private _SalesRepRepo As Titan.Business.Repositories.ISalesRepresentativeRepository

        Public Property Customers As IEnumerable(Of Titan.Business.Customer)
        Public Property SalesReps As IEnumerable(Of Titan.Business.SalesRepresentative)

        Public Sub New()
            _Repository = New Titan.Business.Repositories.CustomerRepository
            _SalesRepRepo = New Titan.Business.Repositories.SalesRepresentativeRepository

            _Customers = _Repository.Query(Function(x) x.LastName.StartsWith("Str"))
            _SalesReps = _SalesRepRepo.Query(Function(x) x.LastName.StartsWith("Str"))

        End Sub

    End Class
End Namespace

存储库和接口：

Namespace Repositories
    Public Interface IRepository(Of T)
        Function Query(ByVal Predicate As System.Linq.Expressions.Expression(Of Func(Of T, Boolean))) As IEnumerable(Of T)
        Function GetByID(ByVal ID As Integer) As T
        Sub Add(ByVal Entity As T)
        Sub Delete(ByVal Entity As T)
        Sub Save(ByVal Entity As T)

    End Interface

    Public Interface ICustomerRepository
        Inherits IRepository(Of Customer)

    End Interface

    Public Interface ISalesRepresentativeRepository
        Inherits IRepository(Of SalesRepresentative)

    End Interface

End Namespace

Namespace Repositories
    Public Class SalesRepresentativeRepository
        Implements ISalesRepresentativeRepository

        Public Sub Add(ByVal Entity As SalesRepresentative) Implements IRepository(Of SalesRepresentative).Add

        End Sub

        Public Sub Delete(ByVal Entity As SalesRepresentative) Implements IRepository(Of SalesRepresentative).Delete

        End Sub

        Public Function GetByID(ByVal ID As Integer) As SalesRepresentative Implements IRepository(Of SalesRepresentative).GetByID

        End Function

        Public Function Query(ByVal Predicate As System.Linq.Expressions.Expression(Of System.Func(Of SalesRepresentative, Boolean))) As System.Collections.Generic.IEnumerable(Of SalesRepresentative) Implements IRepository(Of SalesRepresentative).Query
            Using db As New GTGContainer
                Return db.SalesRepresentatives.Where(Predicate).ToList
            End Using
        End Function

        Public Sub Save(ByVal Entity As SalesRepresentative) Implements IRepository(Of SalesRepresentative).Save

        End Sub
    End Class
End Namespace

任何建议对我都会很有帮助。

服务层适合在哪里？

自动映射器怎么样？我现在还需要使用它吗？

依赖注入？有哪位好心人解释一下。

非常感谢，
山姆

Answer 1

Scott Allen 写了一篇关于测试实体框架 4 的精彩文章 - 创建POCO 类是一个很好的第一步，但如果您想测试与 EF 分开的业务层，您将必须引入一个工作单元来协调跨多个存储库的保存状态并允许 DI。