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f62891d25f
sqlpp11/include/sqlpp11/insert_value_list.h
rbock f62891d25f Merged _member and _methods in clauses to _base 
This makes statement_t look much nicer and use less inheritance
2014-11-29 11:10:01 +01:00

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/*
* Copyright (c) 2013-2014, 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_INSERT_VALUE_LIST_H
#define SQLPP_INSERT_VALUE_LIST_H
#include <sqlpp11/type_traits.h>
#include <sqlpp11/detail/logic.h>
#include <sqlpp11/assignment.h>
#include <sqlpp11/interpretable_list.h>
#include <sqlpp11/interpret_tuple.h>
#include <sqlpp11/insert_value.h>
#include <sqlpp11/simple_column.h>
#include <sqlpp11/no_data.h>
#include <sqlpp11/policy_update.h>
namespace sqlpp
{
namespace detail
{
template<typename... Columns>
struct have_all_required_columns
{
static constexpr bool value = false;
};
template<typename First, typename... Columns>
struct have_all_required_columns<First, Columns...>
{
using _table = typename First::_table;
using required_columns = typename _table::_required_insert_columns;
using set_columns = detail::make_type_set_t<First, Columns...>;
static constexpr bool value = detail::is_subset_of<required_columns, set_columns>::value;
};
}
struct insert_default_values_data_t
{};
// COLUMN AND VALUE LIST
struct insert_default_values_t
{
using _traits = make_traits<no_value_t>;
using _recursive_traits = make_recursive_traits<>;
// Data
using _data_t = insert_default_values_data_t;
// Member implementation with data and methods
template<typename Policies>
struct _impl_t
{
_data_t _data;
};
// Base template to be inherited by the statement
template<typename Policies>
struct _base_t
{
using _data_t = insert_default_values_data_t;
_impl_t<Policies> default_values;
_impl_t<Policies>& operator()() { return default_values; }
const _impl_t<Policies>& operator()() const { return default_values; }
template<typename T>
static auto _get_member(T t) -> decltype(t.default_values)
{
return t.default_values;
}
using _consistency_check = consistent_t;
};
};
template<typename Database, typename... Assignments>
struct insert_list_data_t
{
insert_list_data_t(Assignments... assignments):
_assignments(assignments...),
_columns({assignments._lhs}...),
_values(assignments._rhs...)
{}
insert_list_data_t(const insert_list_data_t&) = default;
insert_list_data_t(insert_list_data_t&&) = default;
insert_list_data_t& operator=(const insert_list_data_t&) = default;
insert_list_data_t& operator=(insert_list_data_t&&) = default;
~insert_list_data_t() = default;
std::tuple<Assignments...> _assignments; // FIXME: Need to replace _columns and _values by _assignments (connector-container requires assignments)
std::tuple<simple_column_t<lhs_t<Assignments>>...> _columns;
std::tuple<rhs_t<Assignments>...> _values;
interpretable_list_t<Database> _dynamic_columns;
interpretable_list_t<Database> _dynamic_values;
};
struct assert_no_unknown_tables_in_insert_assignments_t
{
using type = std::false_type;
template<typename T = void>
static void _()
{
static_assert(wrong_t<T>::value, "at least one insert assignment requires a table which is otherwise not known in the statement");
}
};
template<typename Database, typename... Assignments>
struct insert_list_t
{
using _traits = make_traits<no_value_t, tag::is_insert_list>;
using _recursive_traits = make_recursive_traits<lhs_t<Assignments>..., rhs_t<Assignments>...>;
using _is_dynamic = is_database<Database>;
template<template<typename...> class Target>
using copy_assignments_t = Target<Assignments...>; // FIXME: Nice idea to copy variadic template arguments?
template<template<typename...> class Target, template<typename> class Wrap>
using copy_wrapped_assignments_t = Target<Wrap<Assignments>...>;
// Data
using _data_t = insert_list_data_t<Database, Assignments...>;
// Member implementation with data and methods
template <typename Policies>
struct _impl_t
{
template<typename Assignment>
void add_ntc(Assignment assignment)
{
add<Assignment, std::false_type>(assignment);
}
template<typename Assignment, typename TableCheckRequired = std::true_type>
void add(Assignment assignment)
{
static_assert(_is_dynamic::value, "add must not be called for static from()");
static_assert(is_assignment_t<Assignment>::value, "add() arguments require to be assigments");
using _assigned_columns = detail::make_type_set_t<lhs_t<Assignments>...>;
static_assert(not detail::is_element_of<lhs_t<Assignment>, _assigned_columns>::value, "Must not assign value to column twice");
static_assert(not must_not_insert_t<lhs_t<Assignment>>::value, "add() argument must not be used in insert");
static_assert(not TableCheckRequired::value or Policies::template _no_unknown_tables<Assignment>::value, "add() contains a column from a foreign table");
using _serialize_check = sqlpp::serialize_check_t<typename Database::_serializer_context_t, Assignment>;
_serialize_check::_();
using ok = detail::all_t<
_is_dynamic::value,
is_assignment_t<Assignment>::value,
_serialize_check::type::value>;
_add_impl(assignment, ok()); // dispatch to prevent compile messages after the static_assert
}
private:
template<typename Assignment>
void _add_impl(Assignment assignment, const std::true_type&)
{
_data._dynamic_columns.emplace_back(simple_column_t<lhs_t<Assignment>>{assignment._lhs});
_data._dynamic_values.emplace_back(assignment._rhs);
}
template<typename Assignment>
void _add_impl(Assignment assignment, const std::false_type&);
public:
_data_t _data;
};
// Base template to be inherited by the statement
template<typename Policies>
struct _base_t
{
using _data_t = insert_list_data_t<Database, Assignments...>;
_impl_t<Policies> insert_list;
_impl_t<Policies>& operator()() { return insert_list; }
const _impl_t<Policies>& operator()() const { return insert_list; }
template<typename T>
static auto _get_member(T t) -> decltype(t.insert_list)
{
return t.insert_list;
}
using _consistency_check = typename std::conditional<Policies::template _no_unknown_tables<insert_list_t>::value,
consistent_t,
assert_no_unknown_tables_in_insert_assignments_t>::type;
};
};
template<typename... Columns>
struct column_list_data_t
{
column_list_data_t(Columns... columns):
_columns(simple_column_t<Columns>{columns}...)
{}
column_list_data_t(const column_list_data_t&) = default;
column_list_data_t(column_list_data_t&&) = default;
column_list_data_t& operator=(const column_list_data_t&) = default;
column_list_data_t& operator=(column_list_data_t&&) = default;
~column_list_data_t() = default;
using _value_tuple_t = std::tuple<insert_value_t<Columns>...>;
std::tuple<simple_column_t<Columns>...> _columns;
std::vector<_value_tuple_t> _insert_values;
};
struct assert_no_unknown_tables_in_column_list_t
{
using type = std::false_type;
template<typename T = void>
static void _()
{
static_assert(wrong_t<T>::value, "at least one column requires a table which is otherwise not known in the statement");
}
};
template<typename... Columns>
struct column_list_t
{
using _traits = make_traits<no_value_t, tag::is_column_list>;
using _recursive_traits = make_recursive_traits<Columns...>;
using _value_tuple_t = typename column_list_data_t<Columns...>::_value_tuple_t;
// Data
using _data_t = column_list_data_t<Columns...>;
// Member implementation with data and methods
template <typename Policies>
struct _impl_t
{
template<typename... Assignments>
void add(Assignments... assignments)
{
static_assert(detail::all_t<is_assignment_t<Assignments>::value...>::value, "add_values() arguments have to be assignments");
using _arg_value_tuple = std::tuple<insert_value_t<lhs_t<Assignments>>...>;
using _args_correct = std::is_same<_arg_value_tuple, _value_tuple_t>;
static_assert(_args_correct::value, "add_values() arguments do not match columns() arguments");
using ok = detail::all_t<
detail::all_t<is_assignment_t<Assignments>::value...>::value,
_args_correct::value>;
_add_impl(ok(), assignments...); // dispatch to prevent compile messages after the static_assert
}
private:
template<typename... Assignments>
void _add_impl(const std::true_type&, Assignments... assignments)
{
return _data._insert_values.emplace_back(insert_value_t<lhs_t<Assignments>>{assignments._rhs}...);
}
template<typename... Assignments>
void _add_impl(const std::false_type&, Assignments... assignments);
public:
_data_t _data;
};
// Base template to be inherited by the statement
template<typename Policies>
struct _base_t
{
using _data_t = column_list_data_t<Columns...>;
_impl_t<Policies> values;
_impl_t<Policies>& operator()() { return values; }
const _impl_t<Policies>& operator()() const { return values; }
template<typename T>
static auto _get_member(T t) -> decltype(t.values)
{
return t.values;
}
using _consistency_check = typename std::conditional<Policies::template _no_unknown_tables<column_list_t>::value,
consistent_t,
assert_no_unknown_tables_in_column_list_t>::type;
};
};
struct assert_insert_values_t
{
using type = std::false_type;
template<typename T = void>
static void _()
{
static_assert(wrong_t<T>::value, "insert values required, e.g. set(...) or default_values()");
};
};
// NO INSERT COLUMNS/VALUES YET
struct no_insert_value_list_t
{
using _traits = make_traits<no_value_t, tag::is_noop>;
using _recursive_traits = make_recursive_traits<>;
// Data
using _data_t = no_data_t;
// Member implementation with data and methods
template<typename Policies>
struct _impl_t
{
_data_t _data;
};
// Base template to be inherited by the statement
template<typename Policies>
struct _base_t
{
using _data_t = no_data_t;
_impl_t<Policies> no_insert_values;
_impl_t<Policies>& operator()() { return no_insert_values; }
const _impl_t<Policies>& operator()() const { return no_insert_values; }
template<typename T>
static auto _get_member(T t) -> decltype(t.no_insert_values)
{
return t.no_insert_values;
}
using _database_t = typename Policies::_database_t;
template<typename... T>
using _column_check = detail::all_t<is_column_t<T>::value...>;
template<typename... T>
using _assignment_check = detail::all_t<is_assignment_t<T>::value...>;
template<typename Check, typename T>
using _new_statement_t = new_statement_t<Check::value, Policies, no_insert_value_list_t, T>;
using _consistency_check = assert_insert_values_t;
auto default_values() const
-> _new_statement_t<std::true_type, insert_default_values_t>
{
return { static_cast<const derived_statement_t<Policies>&>(*this), insert_default_values_data_t{} };
}
template<typename... Columns>
auto columns(Columns... columns) const
-> _new_statement_t<_column_check<Columns...>, column_list_t<Columns...>>
{
static_assert(detail::all_t<is_column_t<Columns>::value...>::value, "at least one argument is not a column in columns()");
static_assert(sizeof...(Columns), "at least one column required in columns()");
return _columns_impl(_column_check<Columns...>{}, columns...);
}
template<typename... Assignments>
auto set(Assignments... assignments) const
-> _new_statement_t<_assignment_check<Assignments...>, insert_list_t<void, Assignments...>>
{
static_assert(_assignment_check<Assignments...>::value, "at least one argument is not an assignment in set()");
static_assert(sizeof...(Assignments), "at least one assignment expression required in set()");
return _set_impl<void>(_assignment_check<Assignments...>{}, assignments...);
}
template<typename... Assignments>
auto dynamic_set(Assignments... assignments) const
-> _new_statement_t<_assignment_check<Assignments...>, insert_list_t<_database_t, Assignments...>>
{
static_assert(_assignment_check<Assignments...>::value, "at least one argument is not an assignment in set()");
static_assert(not std::is_same<_database_t, void>::value, "dynamic_set must not be called in a static statement");
return _set_impl<_database_t>(_assignment_check<Assignments...>{}, assignments...);
}
private:
template<typename... Columns>
auto _columns_impl(const std::false_type&, Columns... columns) const
-> bad_statement;
template<typename... Columns>
auto _columns_impl(const std::true_type&, Columns... columns) const
-> _new_statement_t<std::true_type, column_list_t<Columns...>>
{
static_assert(not detail::has_duplicates<Columns...>::value, "at least one duplicate argument detected in columns()");
static_assert(detail::none_t<must_not_insert_t<Columns>::value...>::value, "at least one column argument has a must_not_insert tag in its definition");
using _column_required_tables = detail::make_joined_set_t<required_tables_of<Columns>...>;
static_assert(_column_required_tables::size::value == 1, "columns() contains columns from several tables");
static_assert(detail::have_all_required_columns<Columns...>::value, "At least one required column is missing in columns()");
return { static_cast<const derived_statement_t<Policies>&>(*this), column_list_data_t<Columns...>{columns...} };
}
template<typename Database, typename... Assignments>
auto _set_impl(const std::false_type&, Assignments... assignments) const
-> bad_statement;
template<typename Database, typename... Assignments>
auto _set_impl(const std::true_type&, Assignments... assignments) const
-> _new_statement_t<std::true_type, insert_list_t<Database, Assignments...>>
{
static_assert(not detail::has_duplicates<lhs_t<Assignments>...>::value, "at least one duplicate column detected in set()");
static_assert(detail::none_t<must_not_insert_t<lhs_t<Assignments>>::value...>::value, "at least one assignment is prohibited by its column definition in set()");
using _column_required_tables = detail::make_joined_set_t<required_tables_of<lhs_t<Assignments>>...>;
static_assert(sizeof...(Assignments) ? (_column_required_tables::size::value == 1) : true, "set() contains assignments for columns from several tables");
static_assert(not std::is_same<_database_t, void>::value or detail::have_all_required_columns<lhs_t<Assignments>...>::value, "At least one required column is missing in set()");
return { static_cast<const derived_statement_t<Policies>&>(*this), insert_list_data_t<Database, Assignments...>{assignments...} };
}
};
};
// Interpreters
template<typename Context>
struct serializer_t<Context, insert_default_values_data_t>
{
using _serialize_check = consistent_t;
using T = insert_default_values_data_t;
static Context& _(const T& t, Context& context)
{
context << " DEFAULT VALUES";
return context;
}
};
template<typename Context, typename... Columns>
struct serializer_t<Context, column_list_data_t<Columns...>>
{
using _serialize_check = serialize_check_of<Context, Columns...>;
using T = column_list_data_t<Columns...>;
static Context& _(const T& t, Context& context)
{
context << " (";
interpret_tuple(t._columns, ",", context);
context << ")";
context << " VALUES ";
bool first = true;
for (const auto& row : t._insert_values)
{
if (not first)
context << ',';
else
first = false;
context << '(';
interpret_tuple(row, ",", context);
context << ')';
}
return context;
}
};
template<typename Context, typename Database, typename... Assignments>
struct serializer_t<Context, insert_list_data_t<Database, Assignments...>>
{
using _serialize_check = serialize_check_of<Context, Assignments...>;
using T = insert_list_data_t<Database, Assignments...>;
static Context& _(const T& t, Context& context)
{
if (sizeof...(Assignments) + t._dynamic_columns.size() == 0)
{
serialize(insert_default_values_data_t(), context);
}
else
{
context << " (";
interpret_tuple(t._columns, ",", context);
if (sizeof...(Assignments) and not t._dynamic_columns.empty())
context << ',';
interpret_list(t._dynamic_columns, ',', context);
context << ") VALUES(";
interpret_tuple(t._values, ",", context);
if (sizeof...(Assignments) and not t._dynamic_values.empty())
context << ',';
interpret_list(t._dynamic_values, ',', context);
context << ")";
}
return context;
}
};
}
#endif
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