/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public virtual void SetIsNullable(bool nullable, ConfigurationSource configurationSource)
{
if (nullable)
{
if (!ClrType.IsNullableType())
{
throw new InvalidOperationException(CoreStrings.CannotBeNullable(Name, DeclaringEntityType.DisplayName(), ClrType.ShortDisplayName()));
}
if (Keys != null)
{
throw new InvalidOperationException(CoreStrings.CannotBeNullablePK(Name, DeclaringEntityType.DisplayName()));
}
}
UpdateIsNullableConfigurationSource(configurationSource);
var isChanging = IsNullable != nullable;
SetFlag(nullable, PropertyFlags.IsNullable);
if (isChanging)
{
DeclaringEntityType.Model.ConventionDispatcher.OnPropertyNullableChanged(Builder);
}
}
/// <summary> /// Creates a an expression tree that can be used to generate code for the literal value. /// Currently, only very basic expressions such as constructor calls and factory methods taking /// simple constants are supported. /// </summary> /// <param name="value"> The value for which a literal is needed. </param> /// <returns> An expression tree that can be used to generate code for the literal value. </returns> public virtual Expression GenerateCodeLiteral([NotNull] object value) => throw new NotSupportedException(CoreStrings.LiteralGenerationNotSupported(ClrType.ShortDisplayName()));