我想简单地选择数据库中的版本和模板组合。
这是数据库结构:
CREATE Table ProductVersion(
id int not null primary key Identity,
Product_ID int not null,
Version decimal(18,1) not null,
Active bit not null,
LicenseVersion int not null,
FOREIGN KEY (Product_ID) References Products(id)
)
Create Table CodeTemplates(
id int not null primary key Identity,
Name varchar(50) not null,
DLT_ID int not null,
QuantityRule_ID int,
SerialRule_ID int,
DurationRule_ID int,
foreign key (DLT_ID) References DisplayedLicenseTypes(id),
foreign key (QuantityRule_ID) References Rulesets(id),
foreign key (SerialRule_ID) References Rulesets(id),
foreign key (DurationRule_ID) References Rulesets(id)
)
CREATE table ProductVersion_CodeTemplate(
ProductVersion_ID int not null,
CodeTemplate_ID int not null,
CONSTRAINT PK_Restrictions Primary Key Clustered
(
ProductVersion_ID asc,
CodeTemplate_ID asc
),
foreign key (ProductVersion_ID) References ProductVersion(id),
foreign key (CodeTemplate_ID) References CodeTemplates(id)
)
以下是用于 productversion 和 CodeTemplates 的当前模型:
[Table("ProductVersion")]
public class ProductVersionModel
{
public int ID { get; set; }
public virtual ProductModel Product { get; set; }
[DisplayFormat(DataFormatString = "{0:F1}",ApplyFormatInEditMode=true)]
public decimal Version { get; set; }
public bool Active { get; set; }
public int LicenseVersion { get; set; }
}
[Table("CodeTemplates")]
public class TemplateModel
{
public int ID { get; set; }
public string Name { get; set; }
public virtual DisplayedLicenseTypeModel DLT { get; set; }
public virtual List<LicenseFlagModel> LicenseFlags { get; set; }
public virtual RulesetModel QuantityRule { get; set; }
public virtual RulesetModel SerialRule { get; set; }
public virtual RulesetModel DurationRule { get; set; }
}
这是我尝试使用的:
[Table("ProductVersion_CodeTemplate")]
public class ProductVersionWithTemplateModel
{
[Key, Column(Order = 0)]
public virtual ProductVersionModel ProductVersion { get; set; }
[Key, Column(Order = 1)]
public virtual TemplateModel CodeTemplate { get; set; }
}
弹出的第一个错误是:
在模型生成期间检测到一个或多个验证错误:
System.Data.Edm.EdmEntityType: : EntityType 'ProductVersionWithTemplateModel' 没有定义键。定义此 EntityType 的键。System.Data.Edm.EdmEntitySet: EntityType: EntitySet “AppliedTemplates” 基于没有定义键的类型“ProductVersionWithTemplateModel”。
我在这里缺少什么,一个 dbmodelbuilder 绑定?
回答(因为评论中的格式很糟糕):
[Table("ProductVersion_CodeTemplate")]
public class ProductVersionWithTemplateModel
{
[Key, Column(Order = 0)]
public int ProductVersion_ID { get; set; }
[ForeignKey("ProductVersion_ID")]
public virtual ProductVersionModel ProductVersion { get; set; }
[Key, Column(Order = 1)]
public int CodeTemplate_ID { get; set; }
[ForeignKey("CodeTemplate_ID")]
public virtual TemplateModel CodeTemplate { get; set; }
}