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133 lines (115 loc) · 4.08 KB
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/*
* 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.
*/
#ifndef SQLPP_REMOVE_H
#define SQLPP_REMOVE_H
#include <sqlpp11/statement.h>
#include <sqlpp11/connection.h>
#include <sqlpp11/type_traits.h>
#include <sqlpp11/parameter_list.h>
#include <sqlpp11/prepared_remove.h>
#include <sqlpp11/noop.h>
#include <sqlpp11/from.h>
#include <sqlpp11/using.h>
#include <sqlpp11/where.h>
namespace sqlpp
{
struct remove_name_t
{
};
struct remove_t : public statement_name_t<remove_name_t>
{
using _traits = make_traits<no_value_t, tag::is_return_value>;
struct _alias_t
{
};
template <typename Statement>
struct _result_methods_t
{
using _statement_t = Statement;
const _statement_t& _get_statement() const
{
return static_cast<const _statement_t&>(*this);
}
// Execute
template <typename Db, typename Composite>
auto _run(Db& db, const Composite& composite) const -> decltype(db.remove(composite))
{
return db.remove(composite);
}
template <typename Db>
auto _run(Db& db) const -> decltype(db.remove(this->_get_statement()))
{
return db.remove(_get_statement());
}
// Prepare
template <typename Db, typename Composite>
auto _prepare(Db& db, const Composite& composite) const -> prepared_remove_t<Db, Composite>
{
return {{}, db.prepare_remove(composite)};
}
template <typename Db>
auto _prepare(Db& db) const -> prepared_remove_t<Db, _statement_t>
{
return {{}, db.prepare_remove(_get_statement())};
}
};
};
template <typename Context>
struct serializer_t<Context, remove_name_t>
{
using _serialize_check = consistent_t;
using T = remove_name_t;
static Context& _(const T&, Context& context)
{
context << "DELETE";
return context;
}
};
template <typename Database>
using blank_remove_t = statement_t<Database, remove_t, no_from_t, no_using_t, no_where_t<true>>;
inline auto remove() -> blank_remove_t<void>
{
return {blank_remove_t<void>()};
}
template <typename Table>
auto remove_from(Table table) -> decltype(blank_remove_t<void>().from(table))
{
return {blank_remove_t<void>().from(table)};
}
template <typename Database>
auto dynamic_remove(const Database&) -> decltype(blank_remove_t<Database>())
{
static_assert(std::is_base_of<connection, Database>::value, "Invalid database parameter");
return {blank_remove_t<Database>()};
}
template <typename Database, typename Table>
auto dynamic_remove_from(const Database&, Table table) -> decltype(blank_remove_t<Database>().from(table))
{
static_assert(std::is_base_of<connection, Database>::value, "Invalid database parameter");
return {blank_remove_t<Database>().from(table)};
}
}
#endif