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sqlpp11/tests/core/usage/Result.cpp
2021-08-01 20:37:36 +02:00

70 lines
2.8 KiB
C++

/*
* Copyright (c) 2013-2015, Roland Bock
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <iostream>
#include "Sample.h"
#include "MockDb.h"
#include <sqlpp11/sqlpp11.h>
int Result(int, char* [])
{
MockDb db = {};
const auto t = test::TabBar{};
static_assert(sqlpp::can_be_null_t<decltype(t.alpha)>::value, "t.alpha can be null");
// Using a non-enforcing db
for (const auto& row : db(select(all_of(t), t.beta.like("")).from(t).unconditionally()))
{
static_assert(sqlpp::can_be_null_t<decltype(row.alpha)>::value, "row.alpha can be null");
static_assert(std::is_same<bool, decltype(row.alpha.is_null())>::value, "Yikes");
using T = sqlpp::wrap_operand_t<decltype(row.alpha)>;
static_assert(sqlpp::can_be_null_t<T>::value, "row.alpha can be null");
static_assert(sqlpp::is_result_field_t<T>::value, "result_fields are not wrapped");
for (const auto& sub : db(select(all_of(t)).from(t).where(t.alpha == row.alpha)))
{
std::cerr << sub.alpha << std::endl;
}
db(insert_into(t).set(t.beta = row.beta, t.gamma = false));
}
sqlpp::select((t.alpha + 1).as(t.alpha)).flags(sqlpp::all).from(t);
for (const auto& row : db(select(all_of(t)).from(t).unconditionally()))
{
static_assert(sqlpp::can_be_null_t<decltype(row.alpha)>::value, "row.alpha can be null");
}
for (const auto& row : db(select(all_of(t)).from(t).unconditionally()))
{
static_assert(sqlpp::can_be_null_t<decltype(row.alpha)>::value, "row.alpha can be null");
}
sqlpp::select((t.alpha + 1).as(t.alpha)).flags(sqlpp::all).from(t);
return 0;
}