private static void MoveDefaultDiscriminator(
StorageMappingFragment fromFragment, StorageMappingFragment toFragment)
{
var discriminatorColumn = fromFragment.GetDefaultDiscriminator();
if (discriminatorColumn != null)
{
var discriminator = fromFragment.ColumnConditions.SingleOrDefault(
cc => cc.ColumnProperty == discriminatorColumn);
if (discriminator != null)
{
fromFragment.RemoveDefaultDiscriminatorAnnotation();
fromFragment.RemoveConditionProperty(discriminator);
toFragment.AddDiscriminatorCondition(discriminator.ColumnProperty, discriminator.Value);
toFragment.SetDefaultDiscriminator(discriminator.ColumnProperty);
}
}
}
internal void Configure(
DbDatabaseMapping databaseMapping,
StorageMappingFragment fragment,
EntityType entityType,
DbProviderManifest providerManifest)
{
DebugCheck.NotNull(fragment);
DebugCheck.NotNull(providerManifest);
var discriminatorColumn
= fragment.Table.Properties
.SingleOrDefault(c => string.Equals(c.Name, Discriminator, StringComparison.Ordinal));
if (discriminatorColumn == null)
{
var typeUsage
= providerManifest.GetStoreType(DatabaseMappingGenerator.DiscriminatorTypeUsage);
discriminatorColumn
= new EdmProperty(Discriminator, typeUsage)
{
Nullable = false
};
TablePrimitiveOperations.AddColumn(fragment.Table, discriminatorColumn);
}
if (AnyBaseTypeToTableWithoutColumnCondition(
databaseMapping, entityType, fragment.Table, discriminatorColumn))
{
discriminatorColumn.Nullable = true;
}
var existingConfiguration
= discriminatorColumn.GetConfiguration() as Properties.Primitive.PrimitivePropertyConfiguration;
if (Value != null)
{
ConfigureColumnType(providerManifest, existingConfiguration, discriminatorColumn);
fragment.AddDiscriminatorCondition(discriminatorColumn, Value);
}
else
{
if (string.IsNullOrWhiteSpace(discriminatorColumn.TypeName))
{
var typeUsage
= providerManifest.GetStoreType(DatabaseMappingGenerator.DiscriminatorTypeUsage);
discriminatorColumn.PrimitiveType = (PrimitiveType)typeUsage.EdmType;
discriminatorColumn.MaxLength = DatabaseMappingGenerator.DiscriminatorMaxLength;
discriminatorColumn.Nullable = false;
}
GetOrCreateConfiguration <Properties.Primitive.PrimitivePropertyConfiguration>().IsNullable = true;
fragment.AddNullabilityCondition(discriminatorColumn, true);
}
if (_configuration == null)
{
return;
}
if (existingConfiguration != null)
{
string errorMessage;
if ((existingConfiguration.OverridableConfigurationParts &
OverridableConfigurationParts.OverridableInCSpace) !=
OverridableConfigurationParts.OverridableInCSpace &&
!existingConfiguration.IsCompatible(
_configuration, inCSpace: true, errorMessage: out errorMessage))
{
throw Error.ConflictingColumnConfiguration(discriminatorColumn, fragment.Table, errorMessage);
}
}
if (_configuration.IsNullable != null)
{
discriminatorColumn.Nullable = _configuration.IsNullable.Value;
}
_configuration.Configure(discriminatorColumn, fragment.Table, providerManifest);
}
