public bool Equals(T x, T y)
{
var leftValue = _conventionReader.GetPrimaryKeyValue(x);
var rightValue = _conventionReader.GetPrimaryKeyValue(y);
// If the id of both entities is null we can't really say if they represent the same entity
// or not, so treat them as different objects. Better to have duplicates than missing rows in
// the result set, which would be the result of incorrectly assuming two rows of representing
// the same entity.
return(Equals(leftValue, rightValue) && leftValue != null);
}
public void Delete <T>(T instance)
{
var tableName = _conventionReader.GetTableName <T>();
var primaryKeyColumnName = _conventionReader.GetPrimaryKeyColumnName <T>();
var primaryKeyValue = _conventionReader.GetPrimaryKeyValue(instance);
var constraintExpression = QueryExpression.Create(new EqualsExpression(primaryKeyColumnName, primaryKeyValue));
var command = _sqlGenerator.CreateDeleteCommand(tableName, constraintExpression);
_dbCommandExecutor.ExecuteNonQuery(command, ConnectionString);
}
private Row GetRowForEntity(object instance)
{
var type = instance.GetType();
var table = Table(type);
var primaryKeyColumnName = ConventionReader.GetPrimaryKeyColumnName(type);
var primaryKeyValue = ConventionReader.GetPrimaryKeyValue(instance);
foreach (var row in table.Rows)
{
var columnValue = row.GetColumnValue(primaryKeyColumnName);
if (columnValue != null && columnValue.MatchesValue(primaryKeyValue))
{
return(row);
}
}
throw new WeenyMapperException("Could not find any entity of type '{0}' with the primary key '{1}' with value '{2}'", type.FullName, primaryKeyColumnName, primaryKeyValue);
}