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215 lines
11 KiB
215 lines
11 KiB
4 days ago
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/****************************************************************************
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**
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** https://www.qxorm.com/
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** Copyright (C) 2013 Lionel Marty (contact@qxorm.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 Lionel Marty
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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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** contact@qxorm.com
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**
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****************************************************************************/
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#ifndef _QX_SQL_RELATION_ONE_TO_MANY_H_
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#define _QX_SQL_RELATION_ONE_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_OneToMany.h
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* \author Lionel Marty
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* \ingroup QxDao
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* \brief Manage a relationship one-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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* \ingroup QxDao
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* \brief qx::QxSqlRelation_OneToMany<DataType, Owner> : manage a relationship one-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_OneToMany : 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 { is_data_container = QxSqlRelation<DataType, Owner>::is_data_container };
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public:
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QxSqlRelation_OneToMany(IxDataMember * p, const QString & sForeignKey) : QxSqlRelation<DataType, Owner>(p) { this->setRelationType(qx::IxSqlRelation::one_to_many); this->setForeignKey(sForeignKey); qAssert(! this->getForeignKey().isEmpty()); }
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virtual ~QxSqlRelation_OneToMany() { static_assert(is_data_container, "is_data_container"); }
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virtual QString getDescription() const { return "relation one-to-many"; }
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virtual QString createExtraTable() const { return ""; }
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virtual bool getCartesianProduct() const { return true; }
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virtual void createTable(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazySelect(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazyFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void eagerFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazyJoin(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazyWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void eagerWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazyInsert(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazyInsert_Values(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazyUpdate(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
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virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); }
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virtual QSqlError onAfterSave(QxSqlRelationParams & params) const
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{
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if (this->isNullData(params)) { return QSqlError(); }
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this->forceParentIdToAllChildren(params);
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if (! params.recursiveMode()) { return qx::dao::save(this->getContainer(params), (& params.database())); }
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else { return qx::dao::save_with_relation_recursive(this->getContainer(params), params.saveMode(), (& params.database()), (& params)); }
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}
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virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params, int iOffset, int iNameIndex) const
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{ return this->getIdFromQuery_OneToMany(bEager, params, iOffset, iNameIndex); }
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virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
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{ this->updateOffset_OneToMany(bEager, params); }
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virtual void eagerSelect(QxSqlRelationParams & params) const
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{ this->eagerSelect_OneToMany(params); }
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virtual void eagerJoin(QxSqlRelationParams & params) const
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{ this->eagerJoin_OneToMany(params); }
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virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const
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{ this->eagerWhereSoftDelete_OneToMany(params); }
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virtual void * eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
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{
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if (! this->verifyOffset(params, true)) { return NULL; }
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QSqlQuery & query = params.query();
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IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return NULL; }
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IxDataMember * pForeign = this->getDataByKey(this->getForeignKey()); qAssert(pForeign); if (! pForeign) { return NULL; }
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long lIndex = 0; long lOffsetId = ((pId && (! params.isDistinct())) ? pId->getNameCount() : 0);
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long lOffsetForeign = ((pForeign && (! params.isDistinct())) ? pForeign->getNameCount() : 0);
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long lOffsetOld = params.offset(); this->updateOffset(true, params);
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long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetForeign);
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long lRelation = 0; IxSqlRelation * pRelation = NULL;
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bool bValidId(false), bValidForeign(false);
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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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{ QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); }
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for (int i = 0; i < pForeign->getNameCount(); i++)
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{ QVariant vForeign = query.value(lOffsetOld + lOffsetId + i); bValidForeign = (bValidForeign || qx::trait::is_valid_primary_key(vForeign)); }
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if (! bValidId || ! bValidForeign) { return NULL; }
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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)) { return 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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{ QVariant v = query.value(lOffsetOld + i); qx::cvt::from_variant(v, item.key(), "", i, qx::cvt::context::e_database); }
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for (int i = 0; i < pId->getNameCount(); i++)
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{ QVariant v = query.value(lOffsetOld + i); pId->fromVariant((& item_val), v, "", i, qx::cvt::context::e_database); }
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for (int i = 0; i < pForeign->getNameCount(); i++)
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{ QVariant v = query.value(lOffsetOld + lOffsetId + i); pForeign->fromVariant((& item_val), v, "", i, qx::cvt::context::e_database); }
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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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{ QVariant v = this->getIdFromQuery(true, params, (lOffsetOld + i), i); qx::cvt::from_variant(v, item.key(), "", i, qx::cvt::context::e_database); }
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}
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while ((p = this->nextData(lIndex)))
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{ if ((p != pForeign) && (params.checkColumns(p->getKey()))) { p->fromVariant((& item_val), query.value(lOffsetRelation++), -1, qx::cvt::context::e_database); } }
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if (params.relationX())
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{
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QString sOldCustomAliasOwner = params.getCustomAliasOwner(); params.setCustomAliasOwner(params.getCustomAlias());
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long lIndexOwnerOld = params.indexOwner(); params.setIndexOwner(params.index());
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void * pOwnerOld = params.owner(); params.setOwner(& item_val);
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lOffsetOld = params.offset(); params.setOffset(lOffsetRelation++);
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while ((pRelation = this->nextRelation(lRelation)))
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{ if (this->addLazyRelation(params, pRelation)) { pRelation->lazyFetch_ResolveOutput(params); } }
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params.setOwner(pOwnerOld); 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)) { return NULL; }
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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) { return pValue; }
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return (& item_val);
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}
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private:
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void forceParentIdToAllChildren(QxSqlRelationParams & params) const
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{
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bool bForce = qx::QxSqlDatabase::getSingleton()->getForceParentIdToAllChildren();
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if (! bForce || ! params.owner()) { return; }
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IxDataMember * pIdOwner = this->getDataIdOwner(); if (! pIdOwner) { return; }
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IxDataMember * pForeign = this->getDataByKey(this->getForeignKey()); if (! pForeign) { return; }
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if (pIdOwner->getNameCount() != pForeign->getNameCount()) { return; }
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QList<QVariant> vIdOwner;
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for (int i = 0; i < pIdOwner->getNameCount(); i++)
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{ vIdOwner.append(pIdOwner->toVariant(params.owner(), i, qx::cvt::context::e_database)); }
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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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while (itr != itr_end)
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{
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type_data & item_val = item.value_qx();
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for (int i = 0; i < vIdOwner.count(); i++)
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{ pForeign->fromVariant((& item_val), vIdOwner.at(i), "", i, qx::cvt::context::e_database); }
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itr = type_generic_container::next(container, itr, item);
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}
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}
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};
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} // namespace qx
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#endif // _QX_SQL_RELATION_ONE_TO_MANY_H_
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