c# - 使用实体拆分将数据保存到数据库

Question

我正在构建报告系统，但在将数据保存到数据库（实体拆分）时遇到问题。

我的实体：

public class Report
{
    [Key]
    public int ReportId { get; set; }
    public string Title { get; set; }
    public int? DateRange { get; set; }
    public int Layout { get; set; }
    public DateTime? DateFrom { get; set; }
    public DateTime? DateTo { get; set; }
    public int OwnerId { get; set; }
    public DateTime DateCreated { get; set; }
    public virtual List<ReportCharts> ReportCharts { get; set; }
    public virtual List<ReportElements> ReportElements { get; set; }
}

 public class ReportElements
{
    [Key, Column(Order = 1)]
    public int ReportId { get; set; }
    [Key, Column(Order = 2)]
    public string ElementName { get; set; }
    public Boolean Active { get; set; }
}

//Entity class ReportCharts
public class ReportCharts
{
    [Key, Column(Order = 1)]
    public int ReportId { get; set; }
    [Key, Column(Order = 2)]
    public string ChartId { get; set; }
    public Boolean Active { get; set; }
}

在我的 DbContext 中：

class EFDbContext : DbContext
{
    public DbSet<Report> Reports { get; set; }
    protected virtual void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Report>().Property(t => t.ReportId).HasColumnName("ReportId");
        modelBuilder.Entity<Report>().Property(t => t.Title).HasColumnName("Title");
        modelBuilder.Entity<Report>().Property(t => t.DateRange).HasColumnName("DateRange");
        modelBuilder.Entity<Report>().Property(t => t.Layout).HasColumnName("Layout");
        modelBuilder.Entity<Report>().Property(t => t.DateFrom).HasColumnName("DateFrom");
        modelBuilder.Entity<Report>().Property(t => t.DateTo).HasColumnName("DateTo");
        modelBuilder.Entity<Report>().Property(t => t.OwnerId).HasColumnName("OwnerId");
        modelBuilder.Entity<Report>().Property(t => t.DateCreated).HasColumnName("DateCreated");
        modelBuilder.Entity<Report>().HasMany(t => t.ReportElements).WithRequired().HasForeignKey(c => c.ReportId);
        modelBuilder.Entity<Report>().HasMany(t => t.ReportCharts).WithRequired().HasForeignKey(p => p.ReportId);
        modelBuilder.Entity<ReportElements>().Property(c => c.ElementName).HasColumnName("ElementName");
        modelBuilder.Entity<ReportElements>().HasKey(c => new { c.ReportId, c.ElementName });
        modelBuilder.Entity<ReportCharts>().Property(p => p.ChartId).HasColumnName("ChartId");
        modelBuilder.Entity<ReportCharts>().HasKey(c => new { c.ReportId, c.ChartId });
    }

}

在 EF 存储库中：

    public void Save(Report report)
    {
      assignSettingsToEntity(report);  
        // ????
        context.Reports.Add(report);
        context.SaveChanges();     
    }

    //Assign settings to Report Entity  
    public void assignSettingsToEntity(Report report)
    {
        report.Title = report.getSettings().title;
        report.Layout = report.getSettings().layout;
        report.DateRange = report.getSettings().layout;
        report.DateFrom = report.getSettings().dateFrom;
        report.DateTo = report.getSettings().dateTo;
        report.DateCreated = DateTime.Now;
        report.OwnerId = 54180;
    }

当我使用上述代码保存时，数据仅保存到报告表中。如何修改此代码以将数据保存到所有三个表中。

非常感谢您的帮助

Answer 1

我设法使它工作。当我保存它时，它会自动为所有三个表分配新键。

 public void Save(Report report)
    {
        assignSettingsToEntity(report);
        assignElementsToEntity(report);
        assignChartsToEntity(report);
        context.Reports.Add(report);
        context.SaveChanges();     
    }

        public void assignElementsToEntity(Report report)
    {
        report.ReportElements = new List<ReportElements>();
        foreach (ReportElement e in report.Elements)
        {
            ReportElements temp = new ReportElements();
            temp.ElementName = e.Line.Name;
            temp.Active = true;
            report.ReportElements.Add(temp);
        }
    }
    public void assignChartsToEntity(Report report)
    {
        report.ReportCharts = new List<ReportCharts>();
        foreach (string c in report.getSettings().Charts)
        {
            ReportCharts temp = new ReportCharts();
            temp.ChartId = c;
            temp.Active = true;
            report.ReportCharts.Add(temp);
        }
    }