我一直在努力与Breeze进行SaveChanges的投射,并承认我对EF和微风都是新人。当我尝试使用WCF时,之前有一些类似的问题,但现在我已经放弃了WCF并将EF直接添加到我的解决方案中。
在我的控制器中,我将元数据的DTO与DTO一起返回,它完美地结合在一起。
在更改客户端上的数据后,我的Breese控制器[HttpPost] SaveChanges(保存Bundle)被调用,map包含DTO和更改。
如何坚持更改?如果我重新读取DTO投影以进行更新,那么EF无法保存投影,因为它没有“跟踪”,如果我读取完整实体,那么Breeze错误“序列包含没有匹配元素”,因为它正在寻找DTO?我想使用AutoMapper吗?
控制器:
[BreezeController]
public class BreezeController : ApiController
{
readonly EFContextProvider<ManiDbContext> _contextProvider = new EFContextProvider<ManiDbContext>();
[HttpGet]
public string Metadata()
{
return _contextProvider.Metadata();
}
[HttpGet]
public IQueryable<ConsigneDTO> Consignee(string refname)
{
return _contextProvider.Context.consigneDTO(refname);
}
[HttpPost]
public SaveResult SaveChanges(JObject saveBundle)
{
ManiDbContextProvider _mcontextProvider = new ManiDbContextProvider();
return _mcontextProvider.SaveChanges(saveBundle);
}
ManiDbContext(主要的DBContext是CifContext,它是Database First / EF逆向工程师)
public class ManiDbContext : DbContext
{
public CifContext CifDbContext = new CifContext();
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
Database.SetInitializer<ManiDbContext>(null);
modelBuilder.Configurations.Add(new ConsigneDTOMap());
}
public override int SaveChanges()
{
CifDbContext.SaveChanges();
return 1;
}
public IQueryable<ConsigneDTO> consigneDTO(string refname)
{
IQueryable<ConsigneDTO> q = this.CifDbContext.Consignes
.Where(x => x.Refname == refname)
.Select(f => new ConsigneDTO {Refname = f.Refname, Consignee = f.Consignee, Address1 = f.Address1, Address2 = f.Address2, Address3 = f.Address3});
return q;
}
ManiDbContextProvider
public class ManiDbContextProvider : EFContextProvider<CifContext>
// public class ManiDbContextProvider : EFContextProvider<ManiDbContext>
{
public ManiDbContextProvider() : base() { }
protected override void OpenDbConnection()
{// do nothing
}
protected override void CloseDbConnection()
{ // do nothing
}
protected override bool BeforeSaveEntity(EntityInfo entityInfo)
{
var entity = entityInfo.Entity;
if (entity is ConsigneDTO)
{
return BeforeSaveConsignee(entity as ConsigneDTO, entityInfo);
}
throw new InvalidOperationException("Cannot save entity of unknown type");
}
private bool BeforeSaveConsignee(ConsigneDTO c, EntityInfo info)
{
var consdata = this.Context.CifDbContext.Consignes
.Where(x => x.Refname == c.Refname)
.FirstOrDefault(); // ENTITY
// var consdata = this.Context.consigneDTO(c.Refname); // DTO
return (null != consdata) || throwCannotFindConsignee();
}
CifContext(Full Columns - First / EF Reverse Engineer / Consigne类包含键)
public partial class CifContext : DbContext
{
static CifContext()
{
Database.SetInitializer<CifContext>(null);
}
public CifContext()
: base("Name=CifContext")
{
}
public DbSet<Consigne> Consignes { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>(); // Use singular table names
Database.SetInitializer<CifContext>(null);
modelBuilder.Configurations.Add(new ConsigneMap());
}
无论我是读实体还是DTO - 我对微风如何更新EF一无所知
任何帮助都非常感谢:)
此致 麦克