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| author | crupest <crupest@outlook.com> | 2020-10-27 19:21:35 +0800 |
|---|---|---|
| committer | crupest <crupest@outlook.com> | 2020-10-27 19:21:35 +0800 |
| commit | ac769e656b122ff569c3f1534701b71e00fed586 (patch) | |
| tree | 72966645ff1e25139d3995262e1c4349f2c14733 /BackEnd/Timeline/Entities/UtcDateAnnotation.cs | |
| parent | 14e5848c23c643cea9b5d709770747d98c3d75e2 (diff) | |
| download | timeline-ac769e656b122ff569c3f1534701b71e00fed586.tar.gz timeline-ac769e656b122ff569c3f1534701b71e00fed586.tar.bz2 timeline-ac769e656b122ff569c3f1534701b71e00fed586.zip | |
Split front and back end.
Diffstat (limited to 'BackEnd/Timeline/Entities/UtcDateAnnotation.cs')
| -rw-r--r-- | BackEnd/Timeline/Entities/UtcDateAnnotation.cs | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/BackEnd/Timeline/Entities/UtcDateAnnotation.cs b/BackEnd/Timeline/Entities/UtcDateAnnotation.cs new file mode 100644 index 00000000..6600e701 --- /dev/null +++ b/BackEnd/Timeline/Entities/UtcDateAnnotation.cs @@ -0,0 +1,44 @@ +using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using System;
+
+namespace Timeline.Entities
+{
+ // Copied from https://github.com/dotnet/efcore/issues/4711#issuecomment-589842988
+ public static class UtcDateAnnotation
+ {
+ private const string IsUtcAnnotation = "IsUtc";
+ private static readonly ValueConverter<DateTime, DateTime> UtcConverter =
+ new ValueConverter<DateTime, DateTime>(v => v, v => DateTime.SpecifyKind(v, DateTimeKind.Utc));
+
+ public static PropertyBuilder<TProperty> IsUtc<TProperty>(this PropertyBuilder<TProperty> builder, bool isUtc = true) =>
+ builder.HasAnnotation(IsUtcAnnotation, isUtc);
+
+ public static bool IsUtc(this IMutableProperty property) =>
+ ((bool?)property.FindAnnotation(IsUtcAnnotation)?.Value) ?? true;
+
+ /// <summary>
+ /// Make sure this is called after configuring all your entities.
+ /// </summary>
+ public static void ApplyUtcDateTimeConverter(this ModelBuilder builder)
+ {
+ foreach (var entityType in builder.Model.GetEntityTypes())
+ {
+ foreach (var property in entityType.GetProperties())
+ {
+ if (!property.IsUtc())
+ {
+ continue;
+ }
+
+ if (property.ClrType == typeof(DateTime))
+ {
+ property.SetValueConverter(UtcConverter);
+ }
+ }
+ }
+ }
+ }
+}
|