/// <exception cref = "SqlException" />
/// <exception cref = "OperationCanceledException" />
static async ValueTask <MigrationDescriptor?> MbNextDescriptor
(IDbMigrationProvider dbMigrationProvider,
IRwSqlTransaction transaction,
String migrationSchema,
MigrationDescriptorCollection descriptors,
CancellationToken cancellationToken)
{
var mbLastMigration = await
dbMigrationProvider.MaybeLastMigrationInfo(transaction, migrationSchema, cancellationToken);
if (!(mbLastMigration is {} lastMigration))
{
return(descriptors[0]);
}
static (String schema, MigrationDescriptorCollection descriptors) Descript(IDbMigrationPlan migrationPlan)
{
var schema =
migrationPlan.migrationSchema switch {
null => throw new Exception("Migration schema is null."),
"" => throw new Exception("Migration schema is empty string."),
{} value when IsNullOrWhiteSpace(value) => throw new Exception("Migration schema is white space."),
{
}
value => value
};
var migrationDescriptors = new MigrationDescriptorCollection();
migrationPlan.Configure(migrationDescriptors);
return(schema, migrationDescriptors);
}
