public void SetForeignKeyConstraint(Database ForeignDB,
ForeignKeyDeleteAction OnDelete,
ForeignKeyNullifyDelegate NullifyFunc)
{
if (OnDelete == ForeignKeyDeleteAction.NULLIFY &&
NullifyFunc == null)
{
throw new ArgumentException(
"A nullifying function must " +
"be provided when ForeignKeyDeleteAction.NULLIFY is set.");
}
fdbp = ForeignDB;
fkaction = OnDelete;
nullifier = NullifyFunc;
}
/// <summary>
/// Specify the action taken when a referenced record in the foreign key
/// database is deleted.
/// </summary>
/// <param name="ForeignDB">The foreign key database.</param>
/// <param name="OnDelete">
/// The action taken when a reference record is deleted.
/// </param>
/// <param name="NullifyFunc">
/// When <paramref name="OnDelete"/> is
/// <see cref="ForeignKeyDeleteAction.NULLIFY"/>, NullifyFunc is used to
/// set the foreign key to null.
/// </param>
public void SetForeignKeyConstraint(Database ForeignDB,
ForeignKeyDeleteAction OnDelete,
ForeignKeyNullifyDelegate NullifyFunc)
{
if (OnDelete == ForeignKeyDeleteAction.NULLIFY &&
NullifyFunc == null)
throw new ArgumentException(
"A nullifying function must " +
"be provided when ForeignKeyDeleteAction.NULLIFY is set.");
fdbp = ForeignDB;
fkaction = OnDelete;
nullifier = NullifyFunc;
}
/// <summary>
/// Protected method to configure the DB. Only valid before DB->open.
/// </summary>
/// <param name="cfg">Configuration parameters.</param>
protected void Config(SecondaryDatabaseConfig cfg)
{
base.Config(cfg);
KeyGen = cfg.KeyGen;
Nullifier = cfg.ForeignKeyNullfier;
db.set_flags(cfg.flags);
}
