/// <inheritdoc />
public virtual void ProcessEntityTypeAnnotationChanged(
IConventionEntityTypeBuilder entityTypeBuilder,
string name,
IConventionAnnotation?annotation,
IConventionAnnotation?oldAnnotation,
IConventionContext <IConventionAnnotation> context)
{
if (name == SqlServerAnnotationNames.IsTemporal)
{
if (annotation?.Value as bool? == true)
{
if (entityTypeBuilder.Metadata.GetTemporalPeriodStartPropertyName() == null)
{
entityTypeBuilder.HasPeriodStart(PeriodStartDefaultName);
}
if (entityTypeBuilder.Metadata.GetTemporalPeriodEndPropertyName() == null)
{
entityTypeBuilder.HasPeriodEnd(PeriodEndDefaultName);
}
foreach (var skipLevelNavigation in entityTypeBuilder.Metadata.GetSkipNavigations())
{
if (skipLevelNavigation.DeclaringEntityType.IsTemporal() &&
skipLevelNavigation.Inverse is IConventionSkipNavigation inverse &&
inverse.DeclaringEntityType.IsTemporal() &&
skipLevelNavigation.JoinEntityType is IConventionEntityType joinEntityType &&
joinEntityType.HasSharedClrType &&
!joinEntityType.IsTemporal() &&
joinEntityType.GetConfigurationSource() == ConfigurationSource.Convention)
{
joinEntityType.SetIsTemporal(true);
}
}
}
else
{
entityTypeBuilder.HasPeriodStart(null);
entityTypeBuilder.HasPeriodEnd(null);
}
}
if (name == SqlServerAnnotationNames.TemporalPeriodStartPropertyName ||
name == SqlServerAnnotationNames.TemporalPeriodEndPropertyName)
{
if (oldAnnotation?.Value is string oldPeriodPropertyName)
{
var oldPeriodProperty = entityTypeBuilder.Metadata.GetProperty(oldPeriodPropertyName);
entityTypeBuilder.RemoveUnusedImplicitProperties(new[] { oldPeriodProperty });
if (oldPeriodProperty.GetTypeConfigurationSource() == ConfigurationSource.Explicit)
{
if ((name == SqlServerAnnotationNames.TemporalPeriodStartPropertyName &&
oldPeriodProperty.GetDefaultValue() is DateTime start &&
start == DateTime.MinValue) ||
(name == SqlServerAnnotationNames.TemporalPeriodEndPropertyName &&
oldPeriodProperty.GetDefaultValue() is DateTime end &&
end == DateTime.MaxValue))
{
oldPeriodProperty.Builder.HasDefaultValue(null);
}
}
}
if (annotation?.Value is string periodPropertyName)
{
var periodPropertyBuilder = entityTypeBuilder.Property(
typeof(DateTime),
periodPropertyName);
if (periodPropertyBuilder != null)
{
// set column name explicitly so that we don't try to uniquefy it to some other column
// in case another property is defined that maps to the same column
periodPropertyBuilder.HasColumnName(periodPropertyName);
}
}
}
}