47 lines
1.7 KiB
C#
47 lines
1.7 KiB
C#
using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Metadata.Builders;
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using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
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using Microsoft.EntityFrameworkCore.ChangeTracking;
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using Snootalogue.Models;
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using System.Text.Json;
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using System.Collections.Generic;
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namespace Snootalogue.Data {
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public class SnootalogueContext : DbContext {
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public DbSet<Snootalogue.Models.Document> Document { get; set; }
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public SnootalogueContext(
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DbContextOptions<SnootalogueContext> options)
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: base(options) {
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}
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protected override void OnModelCreating(ModelBuilder modelBuilder) {
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modelBuilder.Entity<Document>().Property(item => item.Authors).HasJsonConversion<List<string>>();
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modelBuilder.Entity<Document>().Property(item => item.Tags).HasJsonConversion<List<string>>();
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}
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}
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public static class JsonConversion {
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// big beebus thanks to https://stackoverflow.com/a/59185869
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public static PropertyBuilder<T> HasJsonConversion<T>(this PropertyBuilder<T> propertyBuilder) where T : class, new() {
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ValueConverter<T, string> converter = new ValueConverter<T, string>(
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value => JsonSerializer.Serialize(value, null),
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value => JsonSerializer.Deserialize<T>(value, null)
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);
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ValueComparer<T> comparer = new ValueComparer<T>(
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(l, r) => JsonSerializer.Serialize(l, null) == JsonSerializer.Serialize(r, null),
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value => value == null ? 0 : JsonSerializer.Serialize(value, null).GetHashCode(),
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value => JsonSerializer.Deserialize<T>(JsonSerializer.Serialize(value, null), null)
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);
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propertyBuilder.HasConversion(converter);
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propertyBuilder.Metadata.SetValueConverter(converter);
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propertyBuilder.Metadata.SetValueComparer(comparer);
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propertyBuilder.HasColumnType("jsonb");
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return propertyBuilder;
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}
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}
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}
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