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QxSqlRelation_OneToMany.h
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    00001 /****************************************************************************
    00002 **
    00003 ** https://www.qxorm.com/
    00004 ** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
    00005 **
    00006 ** This file is part of the QxOrm library
    00007 **
    00008 ** This software is provided 'as-is', without any express or implied
    00009 ** warranty. In no event will the authors be held liable for any
    00010 ** damages arising from the use of this software
    00011 **
    00012 ** Commercial Usage
    00013 ** Licensees holding valid commercial QxOrm licenses may use this file in
    00014 ** accordance with the commercial license agreement provided with the
    00015 ** Software or, alternatively, in accordance with the terms contained in
    00016 ** a written agreement between you and Lionel Marty
    00017 **
    00018 ** GNU General Public License Usage
    00019 ** Alternatively, this file may be used under the terms of the GNU
    00020 ** General Public License version 3.0 as published by the Free Software
    00021 ** Foundation and appearing in the file 'license.gpl3.txt' included in the
    00022 ** packaging of this file. Please review the following information to
    00023 ** ensure the GNU General Public License version 3.0 requirements will be
    00024 ** met : http://www.gnu.org/copyleft/gpl.html
    00025 **
    00026 ** If you are unsure which license is appropriate for your use, or
    00027 ** if you have questions regarding the use of this file, please contact :
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    00029 **
    00030 ****************************************************************************/
    00031
    00032 #ifndef _QX_SQL_RELATION_ONE_TO_MANY_H_
    00033 #define _QX_SQL_RELATION_ONE_TO_MANY_H_
    00034
    00035 #ifdef _MSC_VER
    00036 #pragma once
    00037 #endif
    00038
    00046 #include <QxDao/QxSqlRelation.h>
    00047
    00048 namespace qx {
    00049
    00054 template <class DataType, class Owner>
    00055 class QxSqlRelation_OneToMany : public QxSqlRelation<DataType, Owner>
    00056 {
    00057
    00058 private:
    00059
    00060    typedef typename QxSqlRelation<DataType, Owner>::type_owner type_owner;
    00061    typedef typename QxSqlRelation<DataType, Owner>::type_data type_data;
    00062    typedef typename QxSqlRelation<DataType, Owner>::type_container type_container;
    00063    typedef typename QxSqlRelation<DataType, Owner>::type_generic_container type_generic_container;
    00064    typedef typename QxSqlRelation<DataType, Owner>::type_item type_item;
    00065    typedef typename type_generic_container::type_iterator type_iterator;
    00066    typedef typename type_item::type_value type_value;
    00067
    00068    enum { is_data_container = QxSqlRelation<DataType, Owner>::is_data_container };
    00069
    00070 public:
    00071
    00072    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()); }
    00073    virtual ~QxSqlRelation_OneToMany() { static_assert(is_data_container, "is_data_container"); }
    00074
    00075    virtual QString getDescription() const                                     { return "relation one-to-many"; }
    00076    virtual QString createExtraTable() const                                   { return ""; }
    00077    virtual bool getCartesianProduct() const                                   { return true; }
    00078    virtual void createTable(QxSqlRelationParams & params) const               { Q_UNUSED(params); }
    00079    virtual void lazySelect(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
    00080    virtual void lazyFrom(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
    00081    virtual void eagerFrom(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
    00082    virtual void lazyJoin(QxSqlRelationParams & params) const                  { Q_UNUSED(params); }
    00083    virtual void lazyWhere(QxSqlRelationParams & params) const                 { Q_UNUSED(params); }
    00084    virtual void eagerWhere(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
    00085    virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const       { Q_UNUSED(params); }
    00086    virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const    { Q_UNUSED(params); }
    00087    virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
    00088    virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
    00089    virtual void lazyInsert(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
    00090    virtual void lazyInsert_Values(QxSqlRelationParams & params) const         { Q_UNUSED(params); }
    00091    virtual void lazyUpdate(QxSqlRelationParams & params) const                { Q_UNUSED(params); }
    00092    virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
    00093    virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const   { Q_UNUSED(params); }
    00094    virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const         { Q_UNUSED(params); return QSqlError(); }
    00095
    00096    virtual QSqlError onAfterSave(QxSqlRelationParams & params) const
    00097    {
    00098       if (this->isNullData(params)) { return QSqlError(); }
    00099       this->forceParentIdToAllChildren(params);
    00100       if (! params.recursiveMode()) { return qx::dao::save(this->getContainer(params), (& params.database())); }
    00101       else { return qx::dao::save_with_relation_recursive(this->getContainer(params), params.saveMode(), (& params.database()), (& params)); }
    00102    }
    00103
    00104    virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params) const
    00105    { return this->getIdFromQuery_OneToMany(bEager, params); }
    00106
    00107    virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
    00108    { this->updateOffset_OneToMany(bEager, params); }
    00109
    00110    virtual void eagerSelect(QxSqlRelationParams & params) const
    00111    { this->eagerSelect_OneToMany(params); }
    00112
    00113    virtual void eagerJoin(QxSqlRelationParams & params) const
    00114    { this->eagerJoin_OneToMany(params); }
    00115
    00116    virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const
    00117    { this->eagerWhereSoftDelete_OneToMany(params); }
    00118
    00119    virtual void * eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
    00120    {
    00121       if (! this->verifyOffset(params, true)) { return NULL; }
    00122       QSqlQuery & query = params.query();
    00123       IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return NULL; }
    00124       IxDataMember * pForeign = this->getDataByKey(this->getForeignKey()); qAssert(pForeign); if (! pForeign) { return NULL; }
    00125       long lIndex = 0; long lOffsetId = (pId ? pId->getNameCount() : 0); long lOffsetForeign = (pForeign ? pForeign->getNameCount() : 0);
    00126       long lOffsetOld = params.offset(); this->updateOffset(true, params);
    00127       long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetForeign);
    00128       long lRelation = 0; IxSqlRelation * pRelation = NULL;
    00129       bool bValidId(false), bValidForeign(false);
    00130       for (int i = 0; i < pId->getNameCount(); i++)
    00131       { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); }
    00132       for (int i = 0; i < pForeign->getNameCount(); i++)
    00133       { QVariant vForeign = query.value(lOffsetOld + lOffsetId + i); bValidForeign = (bValidForeign || qx::trait::is_valid_primary_key(vForeign)); }
    00134       if (! bValidId || ! bValidForeign) { return NULL; }
    00135
    00136       type_item item = this->createItem();
    00137       type_data & item_val = item.value_qx();
    00138       if (! this->callTriggerBeforeFetch(item_val, params)) { return NULL; }
    00139       for (int i = 0; i < pId->getNameCount(); i++)
    00140       { QVariant v = query.value(lOffsetOld + i); qx::cvt::from_variant(v, item.key(), "", i, qx::cvt::context::e_database); }
    00141       for (int i = 0; i < pId->getNameCount(); i++)
    00142       { QVariant v = query.value(lOffsetOld + i); pId->fromVariant((& item_val), v, "", i, qx::cvt::context::e_database); }
    00143       for (int i = 0; i < pForeign->getNameCount(); i++)
    00144       { QVariant v = query.value(lOffsetOld + lOffsetId + i); pForeign->fromVariant((& item_val), v, "", i, qx::cvt::context::e_database); }
    00145       while ((p = this->nextData(lIndex)))
    00146       { if ((p != pForeign) && (params.checkColumns(p->getKey()))) { p->fromVariant((& item_val), query.value(lOffsetRelation++), -1, qx::cvt::context::e_database); } }
    00147
    00148       if (params.relationX())
    00149       {
    00150          QString sOldCustomAliasOwner = params.getCustomAliasOwner(); params.setCustomAliasOwner(params.getCustomAlias());
    00151          long lIndexOwnerOld = params.indexOwner(); params.setIndexOwner(params.index());
    00152          void * pOwnerOld = params.owner(); params.setOwner(& item_val);
    00153          lOffsetOld = params.offset(); params.setOffset(lOffsetRelation++);
    00154          while ((pRelation = this->nextRelation(lRelation)))
    00155          { if (this->addLazyRelation(params, pRelation)) { pRelation->lazyFetch_ResolveOutput(params); } }
    00156          params.setOwner(pOwnerOld); params.setOffset(lOffsetOld);
    00157          params.setCustomAliasOwner(sOldCustomAliasOwner);
    00158          params.setIndexOwner(lIndexOwnerOld);
    00159       }
    00160
    00161       if (! this->callTriggerAfterFetch(item_val, params)) { return NULL; }
    00162       type_value * pValue = type_generic_container::insertItem(this->getContainer(params), item);
    00163       if (! type_item::is_value_pointer && pValue) { return pValue; }
    00164       return (& item_val);
    00165    }
    00166
    00167 private:
    00168
    00169    void forceParentIdToAllChildren(QxSqlRelationParams & params) const
    00170    {
    00171       bool bForce = qx::QxSqlDatabase::getSingleton()->getForceParentIdToAllChildren();
    00172       if (! bForce || ! params.owner()) { return; }
    00173       IxDataMember * pIdOwner = this->getDataIdOwner(); if (! pIdOwner) { return; }
    00174       IxDataMember * pForeign = this->getDataByKey(this->getForeignKey()); if (! pForeign) { return; }
    00175       if (pIdOwner->getNameCount() != pForeign->getNameCount()) { return; }
    00176
    00177       QList<QVariant> vIdOwner;
    00178       for (int i = 0; i < pIdOwner->getNameCount(); i++)
    00179       { vIdOwner.append(pIdOwner->toVariant(params.owner(), i, qx::cvt::context::e_database)); }
    00180
    00181       type_item item;
    00182       type_container & container = this->getContainer(params);
    00183       type_iterator itr = type_generic_container::begin(container, item);
    00184       type_iterator itr_end = type_generic_container::end(container);
    00185
    00186       while (itr != itr_end)
    00187       {
    00188          type_data & item_val = item.value_qx();
    00189          for (int i = 0; i < vIdOwner.count(); i++)
    00190          { pForeign->fromVariant((& item_val), vIdOwner.at(i), "", i, qx::cvt::context::e_database); }
    00191          itr = type_generic_container::next(container, itr, item);
    00192       }
    00193    }
    00194
    00195 };
    00196
    00197 } // namespace qx
    00198
    00199 #endif // _QX_SQL_RELATION_ONE_TO_MANY_H_