Question

我收到以下错误。

消息：Microsoft.EntityFrameworkCore.DbUpdateException：更新条目时发生错误。有关详细信息，请参见内部异常。 ----> System.Data.SqlClient.SqlException：无效的列名'EmploymentTypeEntityEmploymentTypeID'。

将我的实体类名称和实体属性名称结合起来很奇怪。

下面是我的代码。

SystemTest.cs

library(thriftr)

pingpong_thrift = thriftpy::t_load("pingpong.thrift", 
module_name="pingpong_thrift")

client = thriftpy::make_client(pingpong_thrift$PingPong, "127.0.0.1", 6000)
cut(client$ping())

EmploymentTypeGroup.cs

   using (var transaction = _referenceDataDbContext.Database.BeginTransaction())
            {
                _referenceDataDbContext.EmploymentType.AddRangeAsync(

                    new EmploymentTypeEntity
                    {
                        EmploymentTypeID = 1,
                        EmploymentType = "EmploymentType",
                        CategoryTypeID = 27,

                        SiteAddress = null,
                        CreatedBy = "UnitTest",
                        CreatedOn = DateTime.Now,
                        ModifiedBy = "UnitTest",
                        ModifiedOn = DateTime.Now,
                        RowVersion = new RowVersion(1),
                        EmploymentTypeGroups = new[]
                        {
                        new EmploymentTypeGroupEntity
                        {
                            EmploymentTypeGroupID = 11, GroupName = "Child Care", IsActive = true
                        }
                        }
                    }

                    }
                );

                _referenceDataDbContext.Database.ExecuteSqlCommand("SET IDENTITY_INSERT [ref].[EmploymentType] ON");

                _referenceDataDbContext.SaveChanges();
            }

EmploymentType.cs

  public class EmploymentTypeGroupEntity
    {
        [Key]
        public int? EmploymentTypeGroupID { get; set; }
        public string GroupName { get; set; }
        public bool? IsActive { get; set; }
        public DateTime? CreatedOn { get; set; }
        public string CreatedBy { get; set; }
        public DateTime? ModifiedOn { get; set; }
        public string ModifiedBy { get; set; }

        [Timestamp]
        [ConcurrencyCheck]
        public byte[] RowVersion { get; set; }

    }

DataDbContext.cs

public class EmploymentTypeEntity
    {
        [Key]
        public int? EmploymentTypeID { get; set; }
        public string EmploymentType { get; set; }
        public int? CategoryTypeID { get; set; }

        public bool? SiteAddress { get; set; }
        public IEnumerable<EmploymentTypeGroupEntity> EmploymentTypeGroups { get; set; }
        public DateTime? CreatedOn { get; set; }
        public string CreatedBy { get; set; }
        public DateTime? ModifiedOn { get; set; }
        public string ModifiedBy { get; set; }

        [Timestamp]
        [ConcurrencyCheck]
        public byte[] RowVersion { get; set; }
    }

Answer 1

您正在创建EmploymentTypeGroupEntity和EmploymentTypeEntity之间的关系。但是您并没有告诉Entity Framework那是什么关系。 EF猜想您想要在EmploymentTypeGroupEntity表中引用EmploymentTypeEntity，并为此创建了一个字段。显然这不是您想要的。

您需要告诉EF关系是什么。如果是一对多关系，其中一个employmentTypeEntity可以具有许多employmentTypeGroupEntity，则这种情况似乎是因为您已定义：

 <Style TargetType="ComboBoxItem">
                            <Setter Property="Background" Value="Transparent" />
                            <Setter Property="Template">
                                <Setter.Value>
                                    <ControlTemplate TargetType="ComboBoxItem">
                                        <Grid x:Name="LayoutRoot" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}">
                                            <VisualStateManager.VisualStateGroups>
                                                <VisualStateGroup x:Name="CommonStates">
                                                    <VisualState x:Name="Normal">
                                                        <Storyboard>
                                                            // What should go here?
                                                        </Storyboard>
                                                    </VisualState>
                                                </VisualStateGroup>
                                            </VisualStateManager.VisualStateGroups>
                                        </Grid>
                                    </ControlTemplate>
                                </Setter.Value>
                            </Setter>
</Style>

您还需要在EmploymentTypeGroupEntity类中创建一个外键。因此添加到此类：

public IEnumerable<EmploymentTypeGroupEntity> EmploymentTypeGroups { get; set; }

在EmploymentTypeEntity类中，更改集合类型：

public int EmploymentTypeEntityID { get; set; }

[ForeignKey(EmploymentTypeEntityID)]
public EmploymentTypeEntity EmploymentTypeEntity  { get; set; }

添加一个构造函数，将新的List（）分配给EmploymentTypeGroups。

在测试中更改数组分配以添加到集合中，并将外键添加到组创建中。

在实体框架核心中获取无效的列名'EmploymentTypeEntityEmploymentTypeID

1 个答案: