QxOrm 1.4.9
C++ Object Relational Mapping library
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QxSqlRelation_ManyToMany.h
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31
32#ifndef _QX_SQL_RELATION_MANY_TO_MANY_H_
33#define _QX_SQL_RELATION_MANY_TO_MANY_H_
34
35#ifdef _MSC_VER
36#pragma once
37#endif
38
46#include <QxDao/QxSqlRelation.h>
47
48namespace qx {
49
54template <class DataType, class Owner>
55class QxSqlRelation_ManyToMany : public QxSqlRelation<DataType, Owner>
56{
57
58private:
59
66 typedef typename type_item::type_value type_value;
67
69
70public:
71
72 QxSqlRelation_ManyToMany(IxDataMember * p, const QString & sExtraTable, const QString & sForeignKeyOwner, const QString & sForeignKeyDataType) : QxSqlRelation<DataType, Owner>(p) { this->setRelationType(qx::IxSqlRelation::many_to_many); this->setExtraTable(sExtraTable); this->setForeignKeyOwner(sForeignKeyOwner); this->setForeignKeyDataType(sForeignKeyDataType); this->verifyParameters(); }
73 virtual ~QxSqlRelation_ManyToMany() { static_assert(is_data_container, "is_data_container"); }
74
75 virtual QString getDescription() const { return "relation many-to-many"; }
76 virtual bool getCartesianProduct() const { return true; }
77 virtual void createTable(QxSqlRelationParams & params) const { Q_UNUSED(params); }
78 virtual void lazySelect(QxSqlRelationParams & params) const { Q_UNUSED(params); }
79 virtual void lazyFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); }
80 virtual void eagerFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); }
81 virtual void lazyJoin(QxSqlRelationParams & params) const { Q_UNUSED(params); }
82 virtual void lazyWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); }
83 virtual void eagerWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); }
84 virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const { Q_UNUSED(params); }
85 virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
86 virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
87 virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
88 virtual void lazyInsert(QxSqlRelationParams & params) const { Q_UNUSED(params); }
89 virtual void lazyInsert_Values(QxSqlRelationParams & params) const { Q_UNUSED(params); }
90 virtual void lazyUpdate(QxSqlRelationParams & params) const { Q_UNUSED(params); }
91 virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
92 virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
93 virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); }
94
95 virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params, int iOffset, int iNameIndex) const
96 { return this->getIdFromQuery_ManyToMany(bEager, params, iOffset, iNameIndex); }
97
98 virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
99 { this->updateOffset_ManyToMany(bEager, params); }
100
101 virtual void eagerSelect(QxSqlRelationParams & params) const
102 { this->eagerSelect_ManyToMany(params); }
103
104 virtual void eagerJoin(QxSqlRelationParams & params) const
105 { this->eagerJoin_ManyToMany(params); }
106
107 virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const
108 { this->eagerWhereSoftDelete_ManyToMany(params); }
109
110 virtual void * eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
111 {
112 if (! this->verifyOffset(params, true)) { return NULL; }
113 QSqlQuery & query = params.query();
114 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId);
115 long lIndex = 0; long lOffsetId = ((pId && (! params.isDistinct())) ? pId->getNameCount() : 0); bool bValidId(false);
116 long lOffsetOld = params.offset(); this->updateOffset(true, params);
117 long lRelation = 0; IxSqlRelation * pRelation = NULL;
118
119 if (! params.isDistinct())
120 {
121 for (int i = 0; i < pId->getNameCount(); i++)
122 { QVariant v = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(v)); }
123 if (! bValidId) { return NULL; }
124 }
125
126 type_item item = this->createItem();
127 type_data & item_val = item.value_qx();
128 if (! this->callTriggerBeforeFetch(item_val, params)) { return NULL; }
129
130 if (! params.isDistinct())
131 {
132 for (int i = 0; i < pId->getNameCount(); i++)
133 { QVariant v = query.value(lOffsetOld + i); qx::cvt::from_variant(v, item.key(), "", i, qx::cvt::context::e_database); }
134 for (int i = 0; i < pId->getNameCount(); i++)
135 { QVariant v = query.value(lOffsetOld + i); pId->fromVariant((& item_val), v, "", i, qx::cvt::context::e_database); }
136 }
137 else
138 {
139 for (int i = 0; i < pId->getNameCount(); i++)
140 { QVariant v = this->getIdFromQuery(true, params, (lOffsetOld + i), i); qx::cvt::from_variant(v, item.key(), "", i, qx::cvt::context::e_database); }
141 }
142
143 long lOffsetRelation = (lOffsetOld + lOffsetId); long lCurrIndex = 0;
144 while ((p = this->nextData(lIndex)))
145 { if (params.checkColumns(p->getKey())) { p->fromVariant((& item_val), query.value(lCurrIndex + lOffsetRelation), -1, qx::cvt::context::e_database); lCurrIndex++; } }
146
147 if (params.relationX())
148 {
149 long lOffsetCurrent = (lCurrIndex + lOffsetRelation);
150 QString sOldCustomAliasOwner = params.getCustomAliasOwner(); params.setCustomAliasOwner(params.getCustomAlias());
151 long lIndexOwnerOld = params.indexOwner(); params.setIndexOwner(params.index());
152 void * pOwnerOld = params.owner(); params.setOwner(& item_val);
153 lOffsetOld = params.offset(); params.setOffset(lOffsetCurrent);
154 while ((pRelation = this->nextRelation(lRelation)))
155 { if (this->addLazyRelation(params, pRelation)) { pRelation->lazyFetch_ResolveOutput(params); } }
156 params.setOwner(pOwnerOld); params.setOffset(lOffsetOld);
157 params.setCustomAliasOwner(sOldCustomAliasOwner);
158 params.setIndexOwner(lIndexOwnerOld);
159 }
160
161 if (! this->callTriggerAfterFetch(item_val, params)) { return NULL; }
162 type_value * pValue = type_generic_container::insertItem(this->getContainer(params), item);
163 if (! type_item::is_value_pointer && pValue) { return pValue; }
164 return (& item_val);
165 }
166
167 virtual QSqlError onAfterSave(QxSqlRelationParams & params) const
168 {
169 QSqlError daoError;
170 if (this->isNullData(params)) { return this->deleteFromExtraTable(params); }
171 if (! params.recursiveMode()) { daoError = qx::dao::save(this->getContainer(params), (& params.database())); }
172 else { daoError = qx::dao::save_with_relation_recursive(this->getContainer(params), params.saveMode(), (& params.database()), (& params)); }
173 if (daoError.isValid()) { return daoError; }
174 daoError = this->deleteFromExtraTable(params);
175 if (daoError.isValid()) { return daoError; }
176 daoError = this->insertIntoExtraTable(params);
177 if (daoError.isValid()) { return daoError; }
178 return QSqlError();
179 }
180
181 virtual QString createExtraTable() const
182 { return this->createExtraTable_ManyToMany(); }
183
184private:
185
187 { qAssert(! this->getExtraTable().isEmpty() && ! this->getForeignKeyOwner().isEmpty() && ! this->getForeignKeyDataType().isEmpty() && (this->getForeignKeyOwner() != this->getForeignKeyDataType())); }
188
190 { return this->deleteFromExtraTable_ManyToMany(params); }
191
193 {
194 IxDataMember * pIdOwner = this->getDataIdOwner(); qAssert(pIdOwner);
195 IxDataMember * pIdData = this->getDataId(); qAssert(pIdData);
196 if (! pIdOwner || ! pIdData) { return QSqlError(); }
197 QStringList lstForeignKeyOwner = this->getForeignKeyOwner().split("|");
198 QStringList lstForeignKeyDataType = this->getForeignKeyDataType().split("|");
199 qAssert(pIdOwner->getNameCount() == lstForeignKeyOwner.count());
200 qAssert(pIdData->getNameCount() == lstForeignKeyDataType.count());
201
202 QString sql = "INSERT INTO " + this->getExtraTable() + " (";
203 sql += pIdOwner->getSqlName(", ", this->getForeignKeyOwner(), false, (& params.builder()));
204 sql += ", ";
205 sql += pIdData->getSqlName(", ", this->getForeignKeyDataType(), false, (& params.builder()));
206 sql += ") VALUES (";
207 sql += pIdOwner->getSqlPlaceHolder("", -1, ", ", this->getForeignKeyOwner()) + ", " + pIdData->getSqlPlaceHolder("", -1, ", ", this->getForeignKeyDataType()) + ")";
208 if (this->traceSqlQuery()) { qDebug("[QxOrm] sql query (extra-table) : %s", qPrintable(sql)); }
209
210 type_item item;
211 type_container & container = this->getContainer(params);
212 type_iterator itr = type_generic_container::begin(container, item);
213 type_iterator itr_end = type_generic_container::end(container);
214 QSqlQuery queryInsert(params.database());
215 if (! queryInsert.prepare(sql)) { return queryInsert.lastError(); }
216
217 while (itr != itr_end)
218 {
219 pIdOwner->setSqlPlaceHolder(queryInsert, params.owner(), "", this->getForeignKeyOwner());
220 pIdData->setSqlPlaceHolder(queryInsert, (& item.value_qx()), "", this->getForeignKeyDataType());
221 if (! queryInsert.exec()) { return queryInsert.lastError(); }
222 itr = type_generic_container::next(container, itr, item);
223 }
224
225 return QSqlError();
226 }
227
228};
229
230} // namespace qx
231
232#endif // _QX_SQL_RELATION_MANY_TO_MANY_H_
#define qAssert(x)
Definition QxMacro.h:52
Base class for all relationships defined between 2 classes (or between 2 tables in database)
qx::IxDataMember : common interface for all class properties registered into QxOrm context
QString getKey() const
QString getSqlPlaceHolder(const QString &sAppend=QString(), int iIndexName=0, const QString &sSep=QString(", "), const QString &sOtherName=QString(), bool bCheckFKPartOfPK=false) const
virtual qx_bool fromVariant(void *pOwner, const QVariant &v, const QString &sFormat, int iIndexName=-1, qx::cvt::context::ctx_type ctx=qx::cvt::context::e_no_context)=0
void setSqlPlaceHolder(QSqlQuery &query, void *pOwner, const QString &sAppend=QString(), const QString &sOtherName=QString(), bool bCheckFKPartOfPK=false, qx::QxCollection< QString, QVariantList > *pLstExecBatch=NULL) const
QString getSqlName(const QString &sSep=QString(", "), const QString &sOtherName=QString(), bool bCheckFKPartOfPK=false, qx::IxSqlQueryBuilder *pSqlQueryBuilder=NULL) const
int getNameCount() const
qx::IxSqlRelation : common interface for all relationships defined between 2 classes (or between 2 ta...
bool addLazyRelation(QxSqlRelationParams &params, IxSqlRelation *pRelation) const
void setForeignKeyDataType(const QString &s) const
QSqlError deleteFromExtraTable_ManyToMany(QxSqlRelationParams &params) const
QString getExtraTable() const
QString createExtraTable_ManyToMany() const
bool traceSqlQuery() const
IxDataMember * getDataId() const
void eagerWhereSoftDelete_ManyToMany(QxSqlRelationParams &params) const
virtual void lazyFetch_ResolveOutput(QxSqlRelationParams &params) const =0
bool verifyOffset(QxSqlRelationParams &params, bool bId) const QX_USED
QString getForeignKeyDataType() const
void setExtraTable(const QString &s) const
QString getForeignKeyOwner() const
IxDataMember * nextData(long &lIndex) const
void eagerSelect_ManyToMany(QxSqlRelationParams &params) const
void updateOffset_ManyToMany(bool bEager, QxSqlRelationParams &params) const
IxSqlRelation * nextRelation(long &lIndex) const
IxDataMember * getDataIdOwner() const
void eagerJoin_ManyToMany(QxSqlRelationParams &params) const
void setRelationType(relation_type e)
QVariant getIdFromQuery_ManyToMany(bool bEager, QxSqlRelationParams &params, int iOffset, int iNameIndex) const
void setForeignKeyOwner(const QString &s) const
qx::QxSqlRelation_ManyToMany<DataType, Owner> : manage a relationship many-to-many defined between 2 ...
virtual void eagerSelect(QxSqlRelationParams &params) const
virtual void updateOffset(bool bEager, QxSqlRelationParams &params) const
virtual void lazyFetch_ResolveInput(QxSqlRelationParams &params) const
QxSqlRelation< DataType, Owner >::type_generic_container type_generic_container
QxSqlRelation< DataType, Owner >::type_container type_container
virtual QSqlError onBeforeSave(QxSqlRelationParams &params) const
virtual void lazyWhereSoftDelete(QxSqlRelationParams &params) const
virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams &params, int iOffset, int iNameIndex) const
QxSqlRelation< DataType, Owner >::type_item type_item
virtual void lazyInsert(QxSqlRelationParams &params) const
QxSqlRelation_ManyToMany(IxDataMember *p, const QString &sExtraTable, const QString &sForeignKeyOwner, const QString &sForeignKeyDataType)
virtual QString createExtraTable() const
virtual void * eagerFetch_ResolveOutput(QxSqlRelationParams &params) const
QSqlError deleteFromExtraTable(QxSqlRelationParams &params) const
virtual void lazyInsert_ResolveInput(QxSqlRelationParams &params) const
virtual void lazySelect(QxSqlRelationParams &params) const
virtual void createTable(QxSqlRelationParams &params) const
virtual void eagerFetch_ResolveInput(QxSqlRelationParams &params) const
virtual void eagerWhere(QxSqlRelationParams &params) const
QSqlError insertIntoExtraTable(QxSqlRelationParams &params) const
virtual void lazyFrom(QxSqlRelationParams &params) const
virtual void lazyUpdate_ResolveInput(QxSqlRelationParams &params) const
virtual void eagerFrom(QxSqlRelationParams &params) const
type_generic_container::type_iterator type_iterator
virtual void eagerJoin(QxSqlRelationParams &params) const
virtual void lazyWhere(QxSqlRelationParams &params) const
virtual void lazyInsert_Values(QxSqlRelationParams &params) const
QxSqlRelation< DataType, Owner >::type_data type_data
virtual void eagerWhereSoftDelete(QxSqlRelationParams &params) const
virtual void lazyFetch_ResolveOutput(QxSqlRelationParams &params) const
QxSqlRelation< DataType, Owner >::type_owner type_owner
virtual void lazyJoin(QxSqlRelationParams &params) const
virtual void lazyUpdate(QxSqlRelationParams &params) const
virtual QSqlError onAfterSave(QxSqlRelationParams &params) const
virtual QString getDescription() const
qx::QxSqlRelation<DataType, Owner> : base class for all relationships defined between 2 classes (or b...
bool callTriggerBeforeFetch(type_data &t, QxSqlRelationParams &params) const
bool isNullData(QxSqlRelationParams &params) const
QxSqlRelation< DataType, Owner >::type_tmp_3 type_data
type_tmp_2 type_container
type_container & getContainer(QxSqlRelationParams &params) const
bool callTriggerAfterFetch(type_data &t, QxSqlRelationParams &params) const
type_item createItem() const
qx::QxSqlRelationParams : define list of parameters to transfer to relationships to manage SQL querie...
void setCustomAliasOwner(const QString &s)
IxSqlQueryBuilder & builder()
void setIndexOwner(long lIndex)
bool checkColumns(const QString &s) const
qx::dao::save_mode::e_save_mode saveMode() const
QString getCustomAliasOwner() const
type_lst_relation_linked * relationX() const
QSqlError save(T &t, QSqlDatabase *pDatabase=NULL)
Insert (if no exist) or update (if already exist) an element or a list of elements into database.
Definition QxDao.h:158
QSqlError save_with_relation_recursive(T &t, qx::dao::save_mode::e_save_mode eSaveMode=qx::dao::save_mode::e_check_insert_or_update, QSqlDatabase *pDatabase=NULL, qx::QxSqlRelationParams *pRelationParams=NULL)
Insert (if no exist) or update (if already exist) recursively an element and all levels of relationsh...
Definition QxDao.h:621
qx_bool from_variant(const QVariant &v, T &t, const QString &format=QString(), int index=-1, qx::cvt::context::ctx_type ctx=qx::cvt::context::e_no_context)
Definition QxConvert.h:80
bool is_valid_primary_key(const T &t)
Root namespace for all QxOrm library features.
qx::trait::generic_container<T> : provide some tools to manage all containers without knowing its typ...