83 lines
2.9 KiB
C#
83 lines
2.9 KiB
C#
using Entities.Contracts;
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using Microsoft.AspNetCore.Identity;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Metadata.Builders;
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namespace TechHelper.Context.Configuration
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{
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public class AssignmentConfiguration : IEntityTypeConfiguration<Assignment>
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{
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public void Configure(EntityTypeBuilder<Assignment> builder)
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{
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builder.ToTable("assignments");
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builder.HasKey(a => a.Id);
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builder.Property(a => a.Id)
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.HasColumnName("id")
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.ValueGeneratedOnAdd();
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builder.Property(a => a.Title)
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.IsRequired()
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.HasColumnName("title")
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.HasMaxLength(255);
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builder.Property(a => a.Description)
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.HasColumnName("description");
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builder.Property(a => a.DueDate)
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.IsRequired()
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.HasColumnName("due_date");
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builder.Property(a => a.TotalPoints)
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.HasColumnName("total_points");
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builder.Property(a => a.CreatedBy)
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.HasColumnName("created_by");
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builder.Property(a => a.CreatedAt)
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.IsRequired()
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.HasColumnName("created_at");
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builder.Property(a => a.UpdatedAt)
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.IsRequired()
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.HasColumnName("updated_at");
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builder.Property(a => a.IsDeleted)
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.HasColumnName("deleted");
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// 配置导航属性和关系
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// 关系: Assignment (多) 到 User (一) - CreatedBy 外键
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// 假设 User 实体有 Id 作为主键
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// .WithMany() 表示 User 有多个 Assignment，但这里不指定 User 上的导航属性名称
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// 如果 User 有一个名为 AssignmentsCreated 的导航属性，应写为 .WithMany(u => u.AssignmentsCreated)
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builder.HasOne(a => a.Creator)
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.WithMany() // User 实体没有指向 Assignment 的导航属性 (或我们不知道)
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.HasForeignKey(a => a.CreatedBy)
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.IsRequired(); // CreatedBy 是必填的，对应 [Required] 在外键属性上
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// 关系: Assignment (一) 到 AssignmentClass (多)
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// 假设 AssignmentClass 实体包含一个名为 AssignmentId 的外键属性
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builder.HasMany(a => a.AssignmentClasses)
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.WithOne(ac => ac.Assignment) // AssignmentClass 没有指向 Assignment 的导航属性 (或我们不知道)
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.HasForeignKey("AssignmentId") // 指定外键名称为 AssignmentId
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.OnDelete(DeleteBehavior.Cascade); // 如果 Assignment 被删除，关联的 AssignmentClass 也会被删除
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// 关系: Assignment (一) 到 AssignmentAttachment (多)
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// 假设 AssignmentAttachment 实体包含一个名为 AssignmentId 的外键属性
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builder.HasMany(a => a.AssignmentAttachments)
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.WithOne(aa => aa.Assignment)
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.HasForeignKey("AssignmentId")
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.OnDelete(DeleteBehavior.Cascade);
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// 关系: Assignment (一) 到 Submission (多)
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// 假设 Submission 实体包含一个名为 AssignmentId 的外键属性
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builder.HasMany(a => a.Submissions)
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.WithOne(s => s.Assignment)
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.HasForeignKey("AssignmentId")
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.OnDelete(DeleteBehavior.Cascade);
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}
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}
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}
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