多对多问题CTP4代码优先 [英] Many to Many Problem CTP4 Code First
问题描述
以下是我收到的错误：
表'Part_Size'被映射为连接表对于'MISMobileDAL.WOs.WOPartsList'的导航属性'Sizes'以及对象集'WOPartsListSet'。导航属性必须与对象集内联或映射到单独的表。
此Part_Size表是一个多对多的连接表，它定义了零件可能具有的每个尺寸以及该零件/尺寸的相关属性，例如库存水平和定价......
[ DataContract （IsReference = true ）] [ Serializable ] public class ; WOPartSize
{
[ DataMember ] 公共 int WOPartSizeId { get ; set ; } [ DataMember ] public DateTime tadded { get ; set ; }
[ DataMember ]
[ MaxLength （50）]
public string size { get ; set ; }
&nb sp; [ DataMember ] [ MaxLength （20）]
public string type { get ; 设置; } [ DataMember ] public int WOPersonnelId { get ; set ; }
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; [<跨度风格= "颜色：＃2b91af">数据成员]
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP ; public virtual < span style ="color：＃2b91af"> WOPersonnel AddedBy { get ; 设置; }
// 导航 收藏 [ DataMember ]
public virtual ICollection的<的 WOPartsList >&NBSP;零件与NBSP; {&NBSP;的 GET ; set ; }
&NBSP;&NBSP;的 //&NBSP;查找&NBSP;关于&NBSP;所述 电话&NBSP;这些&NBSP;字段&NBSP;提供&NBSP;所述&NBSP; snyc&NBSP;机制
&NBSP;&NBSP;&NBSP ; [ DataMember ] public DateTime LastEditDate { get ; 设置; } [ DataMember ]
public DateTime CreationDate { get ; set ; }
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; [<跨度风格= "颜色：＃2b91af">数据成员]
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP ; [ StoreGenerated （ StoreGeneratedPattern .None）] ; publi c Guid rowguid { get ; set ; }
}
public class WOPartSizeEntityConfig &NBSP;：&NBSP;的 EntityConfiguration <的 WOPartSize >
&NBSP;&NBSP;&NBSP ; {
public WOPartSizeEntityConfig（）
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; {
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;的此 .HasKey（E&NBSP; =>&NBSP; e.WOPartSizeId）;
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP ; 此 .Property（e => e.WOPartSizeId）.IsIdentity（）;
// FK this .HasRequired(e => e.AddedBy).HasConstraint((e, p) => e.WOPersonnelId == p.WOPersonnelId);
}
}
>
[ DataContract ]
[可序列化] public class Part_Size
{
[密钥]
&nbs p; [ DataMember ] public int WOPartSizeMMId { get ; < span style ="color：blue"> set ; } [ DataMember ] public 日期时间 tadded { get ; set ; [ DataMember ]
; [ MaxLength （50）]
public string & nbsp; part_no { get ; set ; } &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; [<跨度风格= "颜色：＃2b91af">数据成员]
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; public string part_descr { 获取; 设置; } [< span style ="color：＃2b91af"> DataMember ] [ MaxLength （50）] public string sku { get ; set ; [ DataMemb呃] public 十进制 cost_each { get ; set ; ;} [ DataMember ]
public decimal price_each { < span style ="color：blue"> get ; set ; }
[ DataMember ]
public int on_hand { get ; set ; }
& nbsp; [ DataMember ] public int on_trucks { get ; < span style ="color：blue"> set ; } [ DataMember ] public int on_order { get ; set ; ;} // 导航 参考 [ DataMember ] ; public virtua l WOPartsList Part { get ; set ; } [ DataMember ] public int WOPartListId { get ; set ; } [ DataMember ]
; public virtual WOPersonnel AddedBy { get ; set ; } [ DataMember ] public int WOPersonnelId { get ; set ; } [ DataMember ]
public virtual ; WOPartSize PartSize { get ; 设置; } [ DataMember ]
public int WOPartSizeId { get ; set ; }来自 //&NBSP;查找&NBSP;关于&NBSP;所述 电话&NBSP;这些&NBSP;字段&NBSP;提供&NBSP;所述&NBSP; snyc&NBSP;机制
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; [<跨度style ="color：＃2b91af"> DataMember ] public DateTime LastEditDate { get ; 设置; } [ DataMember ]
public DateTime CreationDate { get ; set ; }
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; [ DataMember ] [ StoreGenerated （ StoreGeneratedPattern .None）] 公开 Guid rowguid { get ; set ; }绿色; }
[ DataContract （ IsReference = true ）] [ Serializable ] public class WOPartsList
{
[ DataMember ]
public int WOPartsListId { get ; set ; } [ DataMember ] public DateTime tadded { get ; set ; }来自 [ DataMember ] public 字符串 part_descr { get ; set ; }
// 导航 参考 [ DataMember ] public int WOPersonnelId { get ; set ; ;} [ DataMember ]
public virtual WOPersonnel AddedBy { get ; set ; } [ Da taMember ] public 虚拟 WOPartType PartType { get ; ; set ; } [ DataMember ] public int WOPartTypeId { get ; set ; } [ DataMember ]
public virtual ICollection < WOPartSize > 大小 { get ; set ; }
// 查找 电话 这些 ;字段&NBSP;提供&NBSP;所述&NBSP; snyc&NBSP;机制
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; [<跨度风格= "颜色：＃2b91af">数据成员] public DateTime LastEditDate { get ; set ; }
[ DataMember ] ; public DateTime CreationDate { 获得;&NBSP; < span style ="color：blue"> set ; } [ DataMember ] [ StoreGenerated （ StoreGeneratedPattern .None）]
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;的公共&NBSP ; Guid rowguid { get ; 设置; }
}
public class WOPartsListEntityConfig ： < span style ="color：＃2b91af"> EntityConfiguration < WOPartsList >
{
公共&NBSP; WOPartsListEntityConfig（）
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; {
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP ;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;的此 .HasKey（E&NBSP; =>&NBSP; e.WOPartsListId）;
&NBSP;&NBSP ;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;的此 .Property（E&NBSP; =>&NBSP; e.WOPartsListId） .IsIdentity（）; // ;定义&NBSP;所述&NBSP; FK&NBSP; relaitionships
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;的此 .HasRequired（E&NBSP; =>&NBSP; e.PartType）.HasConstraint（（E，&NBSP; T）&NBSP; =>&NBSP; e.WOPartTypeId&NBSP; ==&NBSP; t.WOPartTypeId）;
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;的此 .HasRequired（E&NBSP; => &NBSP; e.AddedBy）.HasC onstraint（（e， p） => e.WOPersonnelId == p.WOPersonnelId）;
; }
}
我尝试使用流畅的API进行如下配置：
&nbs p;
<预风格= "font-family：索拉"> <预风格= "font-family：索拉">&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; modelBuilder.Entity<的 WOPartsList >（）的hasMany（E&NBSP; =>&NBSP; e.Sizes）.WithMany（E&NBSP; =>&NBSP，E。部分）。地图（" Part_Size" ， （p， s） => ;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;的新&NBSP; {&NBSP; PART_ID&NBSP; =&NBSP; p.WOPartsListId， size_id = s.WOPartSizeId }）;
&nbs磷;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; modelBuilder.Entity<的 Part_Size >（）MapSingleType（E&NBSP; => new
{
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; cost_each&NBSP; =&NBSP; e.cost_each，
&NBSP;&NBSP;&NBSP ;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; CreationDate&NBSP; =&NBSP; e.CreationDate，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; LastEditDate&NBSP; =&NBSP; e.LastEditDate，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP ;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; on_hand&NBSP; =&NBSP; e.on_hand，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; on_order&NBSP; =&NBSP; e.on_order，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NB属;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; on_trucks&NBSP; =&NBSP; e.on_trucks，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP ;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; part_descr&NBSP; =&NBSP; e.part_descr，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP;&NBSP; PART_NO&NBSP; =&NBSP; e.part_no，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP ;&NBSP; price_each&NBSP; =&NBSP; e.price_each，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; SKU&NBSP; =&NBSP; e.sku，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; tadded&NBSP; =&NBSP，E。 tadded，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; WOPartListId&NBSP; =&NBSP; e.WOPartListId，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; WOPartSizeId&NBS磷; =&NBSP; e.WOPartSizeId，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; WOPartSizeMMId&NBSP; =&NBSP; e.WOPartSizeMMId，
&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP; WOPersonnelId&NBSP; =&NBSP; e.WOPersonnelId <无线电通信/> }).ToTable(
我做错了什么？
谢谢
Greg
谢谢，Greg
嗨Greg，
实体框架通常不支持包含有效负载的多对多表（即除了两个外键之外的任何东西），意味着在Code First中映射的多对多关系将只有两个类的集合，并且
中没有类来表示连接表。
在您的示例中，您需要将其映射为两个独立的关系：多个关系WOPartsList - > Part_Size和WOPartSize - > WOPartsList。
~Rowan
Here is the error that I am getting:
The table 'Part_Size' is mapped as a join table for the navigation property 'Sizes' of 'MISMobileDAL.WOs.WOPartsList' and also to an object set 'WOPartsListSet'. The navigation property must be mapped inline with the object set or to a separate table.
This Part_Size table is a many to many join table that defines each size a part may have along with associated properties for that part/size such as inventory levels and pricing...
[DataContract(IsReference = true)]
[Serializable]
public class WOPartSize
{
[DataMember]
public int WOPartSizeId { get; set; }
[DataMember]
public DateTime tadded { get; set; }
[DataMember]
[MaxLength(50)]
public string size { get; set; }
[DataMember]
[MaxLength(20)]
public string type { get; set; }
[DataMember]
public int WOPersonnelId { get; set; }
[DataMember]
public virtual WOPersonnel AddedBy { get; set; }
// Nav Collections
[DataMember]
public virtual ICollection<WOPartsList> Parts { get; set; }
// Lookups on the Phone these fields provide the snyc mechanism
[DataMember]
public DateTime LastEditDate { get; set; }
[DataMember]
public DateTime CreationDate { get; set; }
[DataMember]
[StoreGenerated(StoreGeneratedPattern.None)]
public Guid rowguid { get; set; }
}
public class WOPartSizeEntityConfig : EntityConfiguration<WOPartSize>
{
public WOPartSizeEntityConfig()
{
this.HasKey(e => e.WOPartSizeId);
this.Property(e => e.WOPartSizeId).IsIdentity();
// FK's
this.HasRequired(e => e.AddedBy).HasConstraint((e, p) => e.WOPersonnelId == p.WOPersonnelId);
}
}
[DataContract]
[Serializable]
public class Part_Size
{
[Key]
[DataMember]
public int WOPartSizeMMId { get; set; }
[DataMember]
public DateTime tadded { get; set; }
[DataMember]
[MaxLength(50)]
public string part_no { get; set; }
[DataMember]
public string part_descr { get; set; }
[DataMember]
[MaxLength(50)]
public string sku { get; set; }
[DataMember]
public decimal cost_each { get; set; }
[DataMember]
public decimal price_each { get; set; }
[DataMember]
public int on_hand { get; set; }
[DataMember]
public int on_trucks { get; set; }
[DataMember]
public int on_order { get; set; }
// Nav Refs
[DataMember]
public virtual WOPartsList Part { get; set; }
[DataMember]
public int WOPartListId { get; set; }
[DataMember]
public virtual WOPersonnel AddedBy { get; set; }
[DataMember]
public int WOPersonnelId { get; set; }
[DataMember]
public virtual WOPartSize PartSize { get; set; }
[DataMember]
public int WOPartSizeId { get; set; }
// Lookups on the Phone these fields provide the snyc mechanism
[DataMember]
public DateTime LastEditDate { get; set; }
[DataMember]
public DateTime CreationDate { get; set; }
[DataMember]
[StoreGenerated(StoreGeneratedPattern.None)]
public Guid rowguid { get; set; }
}
[DataContract(IsReference = true)]
[Serializable]
public class WOPartsList
{
[DataMember]
public int WOPartsListId { get; set; }
[DataMember]
public DateTime tadded { get; set; }
[DataMember]
public string part_descr { get; set; }
// Nav References
[DataMember]
public int WOPersonnelId { get; set; }
[DataMember]
public virtual WOPersonnel AddedBy { get; set; }
[DataMember]
public virtual WOPartType PartType { get; set; }
[DataMember]
public int WOPartTypeId { get; set; }
[DataMember]
public virtual ICollection<WOPartSize> Sizes { get; set; }
// Lookups on the Phone these fields provide the snyc mechanism
[DataMember]
public DateTime LastEditDate { get; set; }
[DataMember]
public DateTime CreationDate { get; set; }
[DataMember]
[StoreGenerated(StoreGeneratedPattern.None)]
public Guid rowguid { get; set; }
}
public class WOPartsListEntityConfig : EntityConfiguration<WOPartsList>
{
public WOPartsListEntityConfig()
{
this.HasKey(e => e.WOPartsListId);
this.Property(e => e.WOPartsListId).IsIdentity();
// Define the FK relaitionships
this.HasRequired(e => e.PartType).HasConstraint((e, t) => e.WOPartTypeId == t.WOPartTypeId);
this.HasRequired(e => e.AddedBy).HasConstraint((e, p) => e.WOPersonnelId == p.WOPersonnelId);
}
}
I tried to use the fluent API to configure as follows:
modelBuilder.Entity<WOPartsList>().HasMany(e => e.Sizes).WithMany(e => e.Parts).Map("Part_Size", (p, s) =>
new { part_id = p.WOPartsListId, size_id = s.WOPartSizeId });
modelBuilder.Entity<Part_Size>().MapSingleType(e => new
{
cost_each = e.cost_each,
CreationDate = e.CreationDate,
LastEditDate = e.LastEditDate,
on_hand = e.on_hand,
on_order = e.on_order,
on_trucks = e.on_trucks,
part_descr = e.part_descr,
part_no = e.part_no,
price_each = e.price_each,
sku = e.sku,
tadded = e.tadded,
WOPartListId = e.WOPartListId,
WOPartSizeId = e.WOPartSizeId,
WOPartSizeMMId = e.WOPartSizeMMId,
WOPersonnelId = e.WOPersonnelId
}).ToTable("Part_Size");
What am I doing wrong ?
Thanks
Greg
Thanks, Greg
Hi Greg,
Entity Framework in general does not support many to many tables that contain payload (i.e. anything other than the two foreign keys), meaning many to many relationships mapped in Code First will just have a collection on the two classes and no class in the middle to represent the join table.
In your example you would need to map this as two separate one:many relationships WOPartsList -> Part_Size and WOPartSize -> WOPartsList.
~Rowan
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