60 lines
2.3 KiB
C#
60 lines
2.3 KiB
C#
using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Metadata.Builders;
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using System;
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namespace DataLayer.Configurations
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{
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internal class BookConfig : IEntityTypeConfiguration<Book>
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{
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public void Configure(EntityTypeBuilder<Book> entity)
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{
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entity.HasKey(b => b.BookId);
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entity.HasIndex(b => b.AudibleProductId);
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entity.OwnsOne(b => b.Rating);
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entity.Property(nameof(Book._audioFormat));
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//
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// CRUCIAL: ignore unmapped collections, even get-only
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//
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entity.Ignore(nameof(Book.Authors));
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entity.Ignore(nameof(Book.Narrators));
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entity.Ignore(nameof(Book.AudioFormat));
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entity.Ignore(nameof(Book.TitleWithSubtitle));
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entity.Ignore(b => b.Categories);
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// OwnsMany: "Can only ever appear on navigation properties of other entity types.
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// Are automatically loaded, and can only be tracked by a DbContext alongside their owner."
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entity
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.OwnsMany(b => b.Supplements, b_s =>
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{
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b_s.WithOwner(s => s.Book)
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.HasForeignKey(s => s.BookId);
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b_s.HasKey(s => s.SupplementId);
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});
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// even though it's owned, we need to map its backing field
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entity
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.Metadata
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.FindNavigation(nameof(Book.Supplements))
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.SetPropertyAccessMode(PropertyAccessMode.Field);
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// owns it 1:1, store in separate table
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entity
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.OwnsOne(b => b.UserDefinedItem, b_udi =>
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{
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b_udi.WithOwner(udi => udi.Book)
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.HasForeignKey(udi => udi.BookId);
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b_udi.Property(udi => udi.BookId).ValueGeneratedNever();
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b_udi.ToTable(nameof(Book.UserDefinedItem));
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b_udi.Property(udi => udi.LastDownloaded);
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b_udi
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.Property(udi => udi.LastDownloadedVersion)
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.HasConversion(ver => ver.ToString(), str => Version.Parse(str));
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// owns it 1:1, store in same table
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b_udi.OwnsOne(udi => udi.Rating);
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});
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}
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}
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} |