342 lines
13 KiB
C++
342 lines
13 KiB
C++
/****************************************************************************
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**
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** https://www.qxorm.com/
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** Copyright (C) 2013 XDL Team (ic-east.com)
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**
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** This file is part of the QxOrm library
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**
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** This software is provided 'as-is', without any express or implied
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** warranty. In no event will the authors be held liable for any
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** damages arising from the use of this software
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**
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** Commercial Usage
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** Licensees holding valid commercial QxOrm licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and XDL Team
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file 'license.gpl3.txt' included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met : http://www.gnu.org/copyleft/gpl.html
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**
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** If you are unsure which license is appropriate for your use, or
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** if you have questions regarding the use of this file, please contact :
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** ic-east.com
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**
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****************************************************************************/
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#ifndef _QX_SQL_RELATION_MANY_TO_MANY_H_
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#define _QX_SQL_RELATION_MANY_TO_MANY_H_
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#ifdef _MSC_VER
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#pragma once
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#endif
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/*!
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* \file QxSqlRelation_ManyToMany.h
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* \author XDL Team
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* \ingroup QxDao
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* \brief Manage a relationship many-to-many defined between 2 classes (or between 2 tables in database)
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*/
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#include <QxDao/QxSqlRelation.h>
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namespace qx
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{
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/*!
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* \ingroup QxDao
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* \brief qx::QxSqlRelation_ManyToMany<DataType, Owner> : manage a relationship many-to-many defined between 2 classes (or between 2 tables in database)
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*/
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template <class DataType, class Owner>
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class QxSqlRelation_ManyToMany : public QxSqlRelation<DataType, Owner>
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{
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private:
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typedef typename QxSqlRelation<DataType, Owner>::type_owner type_owner;
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typedef typename QxSqlRelation<DataType, Owner>::type_data type_data;
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typedef typename QxSqlRelation<DataType, Owner>::type_container type_container;
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typedef typename QxSqlRelation<DataType, Owner>::type_generic_container type_generic_container;
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typedef typename QxSqlRelation<DataType, Owner>::type_item type_item;
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typedef typename type_generic_container::type_iterator type_iterator;
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typedef typename type_item::type_value type_value;
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enum
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{
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is_data_container = QxSqlRelation<DataType, Owner>::is_data_container
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};
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public:
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QxSqlRelation_ManyToMany(IxDataMember *p, const QString &sExtraTable, const QString &sForeignKeyOwner, const QString &sForeignKeyDataType) : QxSqlRelation<DataType, Owner>(p)
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{
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this->setRelationType(qx::IxSqlRelation::many_to_many);
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this->setExtraTable(sExtraTable);
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this->setForeignKeyOwner(sForeignKeyOwner);
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this->setForeignKeyDataType(sForeignKeyDataType);
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this->verifyParameters();
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}
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virtual ~QxSqlRelation_ManyToMany() { static_assert(is_data_container, "is_data_container"); }
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virtual QString getDescription() const { return "relation many-to-many"; }
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virtual bool getCartesianProduct() const { return true; }
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virtual void createTable(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazySelect(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazyFrom(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void eagerFrom(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazyJoin(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazyWhere(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void eagerWhere(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazyWhereSoftDelete(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazyFetch_ResolveInput(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void eagerFetch_ResolveInput(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazyFetch_ResolveOutput(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazyInsert(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazyInsert_Values(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazyUpdate(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazyInsert_ResolveInput(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual void lazyUpdate_ResolveInput(QxSqlRelationParams ¶ms) const { Q_UNUSED(params); }
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virtual QSqlError onBeforeSave(QxSqlRelationParams ¶ms) const
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{
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Q_UNUSED(params);
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return QSqlError();
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}
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virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams ¶ms, int iOffset, int iNameIndex) const
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{
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return this->getIdFromQuery_ManyToMany(bEager, params, iOffset, iNameIndex);
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}
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virtual void updateOffset(bool bEager, QxSqlRelationParams ¶ms) const
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{
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this->updateOffset_ManyToMany(bEager, params);
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}
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virtual void eagerSelect(QxSqlRelationParams ¶ms) const
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{
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this->eagerSelect_ManyToMany(params);
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}
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virtual void eagerJoin(QxSqlRelationParams ¶ms) const
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{
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this->eagerJoin_ManyToMany(params);
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}
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virtual void eagerWhereSoftDelete(QxSqlRelationParams ¶ms) const
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{
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this->eagerWhereSoftDelete_ManyToMany(params);
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}
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virtual void *eagerFetch_ResolveOutput(QxSqlRelationParams ¶ms) const
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{
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if (!this->verifyOffset(params, true))
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{
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return NULL;
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}
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QSqlQuery &query = params.query();
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IxDataMember *p = NULL;
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IxDataMember *pId = this->getDataId();
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qAssert(pId);
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long lIndex = 0;
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long lOffsetId = ((pId && (!params.isDistinct())) ? pId->getNameCount() : 0);
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bool bValidId(false);
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long lOffsetOld = params.offset();
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this->updateOffset(true, params);
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long lRelation = 0;
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IxSqlRelation *pRelation = NULL;
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if (!params.isDistinct())
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{
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for (int i = 0; i < pId->getNameCount(); i++)
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{
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QVariant v = query.value(lOffsetOld + i);
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bValidId = (bValidId || qx::trait::is_valid_primary_key(v));
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}
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if (!bValidId)
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{
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return NULL;
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}
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}
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type_item item = this->createItem();
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type_data &item_val = item.value_qx();
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if (!this->callTriggerBeforeFetch(item_val, params))
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{
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return NULL;
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}
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if (!params.isDistinct())
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{
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for (int i = 0; i < pId->getNameCount(); i++)
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{
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QVariant v = query.value(lOffsetOld + i);
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qx::cvt::from_variant(v, item.key(), "", i, qx::cvt::context::e_database);
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}
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for (int i = 0; i < pId->getNameCount(); i++)
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{
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QVariant v = query.value(lOffsetOld + i);
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pId->fromVariant((&item_val), v, "", i, qx::cvt::context::e_database);
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}
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}
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else
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{
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for (int i = 0; i < pId->getNameCount(); i++)
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{
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QVariant v = this->getIdFromQuery(true, params, (lOffsetOld + i), i);
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qx::cvt::from_variant(v, item.key(), "", i, qx::cvt::context::e_database);
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}
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}
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long lOffsetRelation = (lOffsetOld + lOffsetId);
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long lCurrIndex = 0;
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while ((p = this->nextData(lIndex)))
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{
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if (params.checkColumns(p->getKey()))
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{
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p->fromVariant((&item_val), query.value(lCurrIndex + lOffsetRelation), -1, qx::cvt::context::e_database);
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lCurrIndex++;
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}
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}
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if (params.relationX())
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{
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long lOffsetCurrent = (lCurrIndex + lOffsetRelation);
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QString sOldCustomAliasOwner = params.getCustomAliasOwner();
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params.setCustomAliasOwner(params.getCustomAlias());
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long lIndexOwnerOld = params.indexOwner();
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params.setIndexOwner(params.index());
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void *pOwnerOld = params.owner();
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params.setOwner(&item_val);
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lOffsetOld = params.offset();
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params.setOffset(lOffsetCurrent);
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while ((pRelation = this->nextRelation(lRelation)))
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{
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if (this->addLazyRelation(params, pRelation))
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{
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pRelation->lazyFetch_ResolveOutput(params);
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}
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}
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params.setOwner(pOwnerOld);
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params.setOffset(lOffsetOld);
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params.setCustomAliasOwner(sOldCustomAliasOwner);
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params.setIndexOwner(lIndexOwnerOld);
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}
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if (!this->callTriggerAfterFetch(item_val, params))
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{
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return NULL;
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}
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type_value *pValue = type_generic_container::insertItem(this->getContainer(params), item);
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if (!type_item::is_value_pointer && pValue)
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{
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return pValue;
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}
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return (&item_val);
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}
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virtual QSqlError onAfterSave(QxSqlRelationParams ¶ms) const
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{
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QSqlError daoError;
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if (this->isNullData(params))
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{
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return this->deleteFromExtraTable(params);
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}
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if (!params.recursiveMode())
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{
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daoError = qx::dao::save(this->getContainer(params), (¶ms.database()));
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}
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else
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{
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daoError = qx::dao::save_with_relation_recursive(this->getContainer(params), params.saveMode(), (¶ms.database()), (¶ms));
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}
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if (daoError.isValid())
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{
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return daoError;
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}
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daoError = this->deleteFromExtraTable(params);
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if (daoError.isValid())
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{
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return daoError;
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}
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daoError = this->insertIntoExtraTable(params);
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if (daoError.isValid())
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{
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return daoError;
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}
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return QSqlError();
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}
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virtual QString createExtraTable() const
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{
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return this->createExtraTable_ManyToMany();
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}
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private:
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void verifyParameters()
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{
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qAssert(!this->getExtraTable().isEmpty() && !this->getForeignKeyOwner().isEmpty() && !this->getForeignKeyDataType().isEmpty() && (this->getForeignKeyOwner() != this->getForeignKeyDataType()));
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}
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QSqlError deleteFromExtraTable(QxSqlRelationParams ¶ms) const
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{
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return this->deleteFromExtraTable_ManyToMany(params);
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}
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QSqlError insertIntoExtraTable(QxSqlRelationParams ¶ms) const
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{
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IxDataMember *pIdOwner = this->getDataIdOwner();
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qAssert(pIdOwner);
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IxDataMember *pIdData = this->getDataId();
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qAssert(pIdData);
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if (!pIdOwner || !pIdData)
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{
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return QSqlError();
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}
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QStringList lstForeignKeyOwner = this->getForeignKeyOwner().split("|");
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QStringList lstForeignKeyDataType = this->getForeignKeyDataType().split("|");
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qAssert(pIdOwner->getNameCount() == lstForeignKeyOwner.count());
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qAssert(pIdData->getNameCount() == lstForeignKeyDataType.count());
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QString sql = "INSERT INTO " + this->getExtraTable() + " (";
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sql += pIdOwner->getSqlName(", ", this->getForeignKeyOwner(), false, (¶ms.builder()));
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sql += ", ";
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sql += pIdData->getSqlName(", ", this->getForeignKeyDataType(), false, (¶ms.builder()));
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sql += ") VALUES (";
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sql += pIdOwner->getSqlPlaceHolder("", -1, ", ", this->getForeignKeyOwner()) + ", " + pIdData->getSqlPlaceHolder("", -1, ", ", this->getForeignKeyDataType()) + ")";
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if (this->traceSqlQuery())
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{
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qDebug("[QxOrm] sql query (extra-table) : %s", qPrintable(sql));
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}
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type_item item;
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type_container &container = this->getContainer(params);
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type_iterator itr = type_generic_container::begin(container, item);
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type_iterator itr_end = type_generic_container::end(container);
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QSqlQuery queryInsert(params.database());
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if (!queryInsert.prepare(sql))
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{
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return queryInsert.lastError();
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}
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while (itr != itr_end)
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{
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pIdOwner->setSqlPlaceHolder(queryInsert, params.owner(), "", this->getForeignKeyOwner());
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pIdData->setSqlPlaceHolder(queryInsert, (&item.value_qx()), "", this->getForeignKeyDataType());
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if (!queryInsert.exec())
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{
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return queryInsert.lastError();
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}
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itr = type_generic_container::next(container, itr, item);
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}
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return QSqlError();
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}
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};
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} // namespace qx
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#endif // _QX_SQL_RELATION_MANY_TO_MANY_H_
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