[英]Entity Framework : Lazy Loading Not working
I am getting all the related tables populated (multiple times /circular/loop) even for a simple include of 2 tables query.. 我正在填充所有相关表(多次/ circular / loop),即使只是简单地包含2个表查询。
Here are my DB details. 这是我的数据库详细信息。
public interface IPhaniDbContext
{
DbSet<Data_CustomerDetail> CustomerDetails { get; set; }
DbSet<Data_DisplayStyle> DisplayStyles { get; set; }
DbSet<Data_ResumeDetail> ResumeDetails { get; set; }
int Save();
Task<int> SaveChangesAsync();
Database Database { get; }
DbEntityEntry Entity(object entity);
DbSet<TEntity> Set<TEntity>() where TEntity : class;
}
public class PhaniDbContext :DbContext , IPhaniDbContext
{
public PhaniDbContext() : base(ConnectionString())
{
Configuration.LazyLoadingEnabled = false;
}
private static string ConnectionString()
{
return ConfigurationManager.AppSettings[Constants.Appsetting_PhaniDbConnectionString];
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Configurations.AddFromAssembly(Assembly.GetAssembly(GetType()));
modelBuilder.Entity<Data_CustomerDetail>()
.HasMany(x => x.ResumeDetails).WithRequired(e => e.CustomerDetail).WillCascadeOnDelete(false);
//modelBuilder.Entity<Data_CustomerDetail>()
// .Map(x => x.Requires("ResumeDetails")).Ignore(e => e.ResumeDetails)
// .Map(x => x.Requires("DisplayStyle")).Ignore(e => e.ResumeDetails);
modelBuilder.Entity<Data_DisplayStyle>()
.HasMany(x => x.ResumeDetails).WithRequired(e => e.DisplayStyle).WillCascadeOnDelete(false);
}
public int Save()
{
return base.SaveChanges();
}
public DbEntityEntry Entity(object entity)
{
throw new NotImplementedException();
}
//TODO: No-Urget-Over ride Save just to know. and all other possible overrides.
public virtual DbSet<Data_CustomerDetail> CustomerDetails { get; set; }
public virtual DbSet<Data_DisplayStyle> DisplayStyles { get; set; }
public virtual DbSet<Data_ResumeDetail> ResumeDetails { get; set; }
}
Query: 查询:
_phaniDbContext.CustomerDetails
.Include(x => x.ResumeDetails)
.Include(x=>x.ResumeDetails.Select(y=>y.DisplayStyle))
.First(x=>x.CustomerDetailsID == customerId);
My pocos are here: 我的pocos在这里:
[Table("CustomerDetails")]
public class Data_CustomerDetail
{
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
public Data_CustomerDetail()
{
ResumeDetails = new HashSet<Data_ResumeDetail>();
}
[Key]
public int CustomerDetailsID { get; set; }
[StringLength(500)]
public string FirstName { get; set; }
[StringLength(500)]
public string LastName { get; set; }
[StringLength(50)]
public string phoneNumber { get; set; }
[StringLength(50)]
public string Zipcode { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<Data_ResumeDetail> ResumeDetails { get; set; }
}
public class Data_DisplayStyle
{
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
public Data_DisplayStyle()
{
ResumeDetails = new HashSet<Data_ResumeDetail>();
}
public int DisplayStyleID { get; set; }
[StringLength(500)]
public string Name { get; set; }
[StringLength(500)]
public string Description { get; set; }
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
public virtual ICollection<Data_ResumeDetail> ResumeDetails { get; set; }
}
[Table("ResumeDetails")]
public class Data_ResumeDetail
{
[Key]
public int ResumeDetailsId { get; set; }
[Column("CAREER OBJECTIVE")]
[StringLength(4000)]
public string CAREER_OBJECTIVE { get; set; }
[Column("HONORS AND REWARDS")]
[StringLength(4000)]
public string HONORS_AND_REWARDS { get; set; }
[Column("PROFESSIONAL RESPONSIBILITIES")]
[StringLength(4000)]
public string PROFESSIONAL_RESPONSIBILITIES { get; set; }
[Column("RELATED EXPERIENCE")]
[StringLength(4000)]
public string RELATED_EXPERIENCE { get; set; }
public int? CustomerDetailsID { get; set; }
public int? DisplayStyleId { get; set; }
public virtual Data_CustomerDetail CustomerDetail { get; set; }
public virtual Data_DisplayStyle DisplayStyle { get; set; }
}
Could someone please help me in resolving this... 有人可以帮我解决这个问题吗...
I just want CustomerDetails and ResumeDetails and displaystyle table once... not multiple times.. 我只希望CustomerDetails和ResumeDetails和displaystyle表一次...而不是多次。
This is increasing my object weight 这增加了我的物体重量
When doing a foreign key relationship, you probably need to specify the foreign key(s) 在进行外键关系时,您可能需要指定外键
Example: 例:
modelBuilder
.Entity<Data_CustomerDetail>()
.HasMany(x => x.ResumeDetails)
.WithRequired(e => e.CustomerDetail)
.HasForeignKey(e => e.CustomerDetailsID)
.WillCascadeOnDelete(false);
modelBuilder
.Entity<Data_DisplayStyle>()
.HasMany(x => x.ResumeDetails)
.WithRequired(e => e.DisplayStyle)
.HasForeignKey(e => e.DisplayStyleId)
.WillCascadeOnDelete(false);
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