31 lines
822 B
C#
31 lines
822 B
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using Dinah.Core.Collections.Generic;
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using Dinah.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore;
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namespace DataLayer
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{
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internal class TagPersistenceInterceptor : IDbInterceptor
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{
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public void Executed(DbContext context) { }
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public void Executing(DbContext context)
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{
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var tagsCollection
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= context
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.ChangeTracker
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.Entries()
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.Where(e => e.State.In(EntityState.Modified, EntityState.Added))
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.Select(e => e.Entity as UserDefinedItem)
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.Where(udi => udi != null)
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// do NOT filter out entires with blank tags. blank is the valid way to show the absence of tags
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.Select(t => (t.Book.AudibleProductId, t.Tags))
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.ToList();
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FileManager.TagsPersistence.Save(tagsCollection);
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}
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}
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}
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