QxOrm 1.4.9
C++ Object Relational Mapping library
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QxSqlRelation_OneToMany.h
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31
32#ifndef _QX_SQL_RELATION_ONE_TO_MANY_H_
33#define _QX_SQL_RELATION_ONE_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_OneToMany : public QxSqlRelation<DataType, Owner>
56{
57
58private:
59
66 typedef typename type_item::type_value type_value;
67
69
70public:
71
72 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()); }
73 virtual ~QxSqlRelation_OneToMany() { static_assert(is_data_container, "is_data_container"); }
74
75 virtual QString getDescription() const { return "relation one-to-many"; }
76 virtual QString createExtraTable() const { return ""; }
77 virtual bool getCartesianProduct() const { return true; }
78 virtual void createTable(QxSqlRelationParams & params) const { Q_UNUSED(params); }
79 virtual void lazySelect(QxSqlRelationParams & params) const { Q_UNUSED(params); }
80 virtual void lazyFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); }
81 virtual void eagerFrom(QxSqlRelationParams & params) const { Q_UNUSED(params); }
82 virtual void lazyJoin(QxSqlRelationParams & params) const { Q_UNUSED(params); }
83 virtual void lazyWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); }
84 virtual void eagerWhere(QxSqlRelationParams & params) const { Q_UNUSED(params); }
85 virtual void lazyWhereSoftDelete(QxSqlRelationParams & params) const { Q_UNUSED(params); }
86 virtual void lazyFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
87 virtual void eagerFetch_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
88 virtual void lazyFetch_ResolveOutput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
89 virtual void lazyInsert(QxSqlRelationParams & params) const { Q_UNUSED(params); }
90 virtual void lazyInsert_Values(QxSqlRelationParams & params) const { Q_UNUSED(params); }
91 virtual void lazyUpdate(QxSqlRelationParams & params) const { Q_UNUSED(params); }
92 virtual void lazyInsert_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
93 virtual void lazyUpdate_ResolveInput(QxSqlRelationParams & params) const { Q_UNUSED(params); }
94 virtual QSqlError onBeforeSave(QxSqlRelationParams & params) const { Q_UNUSED(params); return QSqlError(); }
95
96 virtual QSqlError onAfterSave(QxSqlRelationParams & params) const
97 {
98 if (this->isNullData(params)) { return QSqlError(); }
99 this->forceParentIdToAllChildren(params);
100 if (! params.recursiveMode()) { return qx::dao::save(this->getContainer(params), (& params.database())); }
101 else { return qx::dao::save_with_relation_recursive(this->getContainer(params), params.saveMode(), (& params.database()), (& params)); }
102 }
103
104 virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams & params, int iOffset, int iNameIndex) const
105 { return this->getIdFromQuery_OneToMany(bEager, params, iOffset, iNameIndex); }
106
107 virtual void updateOffset(bool bEager, QxSqlRelationParams & params) const
108 { this->updateOffset_OneToMany(bEager, params); }
109
110 virtual void eagerSelect(QxSqlRelationParams & params) const
111 { this->eagerSelect_OneToMany(params); }
112
113 virtual void eagerJoin(QxSqlRelationParams & params) const
114 { this->eagerJoin_OneToMany(params); }
115
116 virtual void eagerWhereSoftDelete(QxSqlRelationParams & params) const
117 { this->eagerWhereSoftDelete_OneToMany(params); }
118
119 virtual void * eagerFetch_ResolveOutput(QxSqlRelationParams & params) const
120 {
121 if (! this->verifyOffset(params, true)) { return NULL; }
122 QSqlQuery & query = params.query();
123 IxDataMember * p = NULL; IxDataMember * pId = this->getDataId(); qAssert(pId); if (! pId) { return NULL; }
124 IxDataMember * pForeign = this->getDataByKey(this->getForeignKey()); qAssert(pForeign); if (! pForeign) { return NULL; }
125 long lIndex = 0; long lOffsetId = ((pId && (! params.isDistinct())) ? pId->getNameCount() : 0);
126 long lOffsetForeign = ((pForeign && (! params.isDistinct())) ? pForeign->getNameCount() : 0);
127 long lOffsetOld = params.offset(); this->updateOffset(true, params);
128 long lOffsetRelation = (lOffsetOld + lOffsetId + lOffsetForeign);
129 long lRelation = 0; IxSqlRelation * pRelation = NULL;
130 bool bValidId(false), bValidForeign(false);
131
132 if (! params.isDistinct())
133 {
134 for (int i = 0; i < pId->getNameCount(); i++)
135 { QVariant vId = query.value(lOffsetOld + i); bValidId = (bValidId || qx::trait::is_valid_primary_key(vId)); }
136 for (int i = 0; i < pForeign->getNameCount(); i++)
137 { QVariant vForeign = query.value(lOffsetOld + lOffsetId + i); bValidForeign = (bValidForeign || qx::trait::is_valid_primary_key(vForeign)); }
138 if (! bValidId || ! bValidForeign) { return NULL; }
139 }
140
141 type_item item = this->createItem();
142 type_data & item_val = item.value_qx();
143 if (! this->callTriggerBeforeFetch(item_val, params)) { return NULL; }
144
145 if (! params.isDistinct())
146 {
147 for (int i = 0; i < pId->getNameCount(); i++)
148 { QVariant v = query.value(lOffsetOld + i); qx::cvt::from_variant(v, item.key(), "", i, qx::cvt::context::e_database); }
149 for (int i = 0; i < pId->getNameCount(); i++)
150 { QVariant v = query.value(lOffsetOld + i); pId->fromVariant((& item_val), v, "", i, qx::cvt::context::e_database); }
151 for (int i = 0; i < pForeign->getNameCount(); i++)
152 { QVariant v = query.value(lOffsetOld + lOffsetId + i); pForeign->fromVariant((& item_val), v, "", i, qx::cvt::context::e_database); }
153 }
154 else
155 {
156 for (int i = 0; i < pId->getNameCount(); i++)
157 { QVariant v = this->getIdFromQuery(true, params, (lOffsetOld + i), i); qx::cvt::from_variant(v, item.key(), "", i, qx::cvt::context::e_database); }
158 }
159
160 while ((p = this->nextData(lIndex)))
161 { if ((p != pForeign) && (params.checkColumns(p->getKey()))) { p->fromVariant((& item_val), query.value(lOffsetRelation++), -1, qx::cvt::context::e_database); } }
162
163 if (params.relationX())
164 {
165 QString sOldCustomAliasOwner = params.getCustomAliasOwner(); params.setCustomAliasOwner(params.getCustomAlias());
166 long lIndexOwnerOld = params.indexOwner(); params.setIndexOwner(params.index());
167 void * pOwnerOld = params.owner(); params.setOwner(& item_val);
168 lOffsetOld = params.offset(); params.setOffset(lOffsetRelation++);
169 while ((pRelation = this->nextRelation(lRelation)))
170 { if (this->addLazyRelation(params, pRelation)) { pRelation->lazyFetch_ResolveOutput(params); } }
171 params.setOwner(pOwnerOld); params.setOffset(lOffsetOld);
172 params.setCustomAliasOwner(sOldCustomAliasOwner);
173 params.setIndexOwner(lIndexOwnerOld);
174 }
175
176 if (! this->callTriggerAfterFetch(item_val, params)) { return NULL; }
177 type_value * pValue = type_generic_container::insertItem(this->getContainer(params), item);
178 if (! type_item::is_value_pointer && pValue) { return pValue; }
179 return (& item_val);
180 }
181
182private:
183
185 {
187 if (! bForce || ! params.owner()) { return; }
188 IxDataMember * pIdOwner = this->getDataIdOwner(); if (! pIdOwner) { return; }
189 IxDataMember * pForeign = this->getDataByKey(this->getForeignKey()); if (! pForeign) { return; }
190 if (pIdOwner->getNameCount() != pForeign->getNameCount()) { return; }
191
192 QList<QVariant> vIdOwner;
193 for (int i = 0; i < pIdOwner->getNameCount(); i++)
194 { vIdOwner.append(pIdOwner->toVariant(params.owner(), i, qx::cvt::context::e_database)); }
195
196 type_item item;
197 type_container & container = this->getContainer(params);
198 type_iterator itr = type_generic_container::begin(container, item);
199 type_iterator itr_end = type_generic_container::end(container);
200
201 while (itr != itr_end)
202 {
203 type_data & item_val = item.value_qx();
204 for (int i = 0; i < vIdOwner.count(); i++)
205 { pForeign->fromVariant((& item_val), vIdOwner.at(i), "", i, qx::cvt::context::e_database); }
206 itr = type_generic_container::next(container, itr, item);
207 }
208 }
209
210};
211
212} // namespace qx
213
214#endif // _QX_SQL_RELATION_ONE_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
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
virtual QVariant toVariant(const void *pOwner, const QString &sFormat, int iIndexName=-1, qx::cvt::context::ctx_type ctx=qx::cvt::context::e_no_context) const =0
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
QVariant getIdFromQuery_OneToMany(bool bEager, QxSqlRelationParams &params, int iOffset, int iNameIndex) const
IxDataMember * getDataByKey(const QString &sKey) const
void eagerSelect_OneToMany(QxSqlRelationParams &params) const
IxDataMember * getDataId() const
virtual void lazyFetch_ResolveOutput(QxSqlRelationParams &params) const =0
bool verifyOffset(QxSqlRelationParams &params, bool bId) const QX_USED
IxDataMember * nextData(long &lIndex) const
IxSqlRelation * nextRelation(long &lIndex) const
IxDataMember * getDataIdOwner() const
QString getForeignKey() const
void setRelationType(relation_type e)
void updateOffset_OneToMany(bool bEager, QxSqlRelationParams &params) const
void eagerWhereSoftDelete_OneToMany(QxSqlRelationParams &params) const
void setForeignKey(const QString &s) const
void eagerJoin_OneToMany(QxSqlRelationParams &params) const
static QxSqlDatabase * getSingleton()
bool getForceParentIdToAllChildren() const
qx::QxSqlRelation_OneToMany<DataType, Owner> : manage a relationship one-to-many defined between 2 cl...
type_generic_container::type_iterator type_iterator
virtual void lazyUpdate(QxSqlRelationParams &params) const
QxSqlRelation< DataType, Owner >::type_container type_container
virtual void lazyInsert_Values(QxSqlRelationParams &params) const
virtual void lazyWhere(QxSqlRelationParams &params) const
virtual void lazyInsert_ResolveInput(QxSqlRelationParams &params) const
virtual void lazyInsert(QxSqlRelationParams &params) const
QxSqlRelation< DataType, Owner >::type_data type_data
virtual void updateOffset(bool bEager, QxSqlRelationParams &params) const
virtual QString createExtraTable() const
virtual bool getCartesianProduct() const
void forceParentIdToAllChildren(QxSqlRelationParams &params) const
QxSqlRelation< DataType, Owner >::type_item type_item
virtual void createTable(QxSqlRelationParams &params) const
virtual void lazyUpdate_ResolveInput(QxSqlRelationParams &params) const
virtual void eagerFetch_ResolveInput(QxSqlRelationParams &params) const
virtual void eagerWhere(QxSqlRelationParams &params) const
virtual QSqlError onBeforeSave(QxSqlRelationParams &params) const
virtual void eagerSelect(QxSqlRelationParams &params) const
virtual void eagerFrom(QxSqlRelationParams &params) const
QxSqlRelation_OneToMany(IxDataMember *p, const QString &sForeignKey)
virtual void lazyJoin(QxSqlRelationParams &params) const
virtual void eagerWhereSoftDelete(QxSqlRelationParams &params) const
virtual void eagerJoin(QxSqlRelationParams &params) const
virtual void lazySelect(QxSqlRelationParams &params) const
virtual QString getDescription() const
virtual void lazyFetch_ResolveOutput(QxSqlRelationParams &params) const
virtual QVariant getIdFromQuery(bool bEager, QxSqlRelationParams &params, int iOffset, int iNameIndex) const
virtual void * eagerFetch_ResolveOutput(QxSqlRelationParams &params) const
QxSqlRelation< DataType, Owner >::type_owner type_owner
virtual void lazyFetch_ResolveInput(QxSqlRelationParams &params) const
virtual void lazyFrom(QxSqlRelationParams &params) const
QxSqlRelation< DataType, Owner >::type_generic_container type_generic_container
virtual void lazyWhereSoftDelete(QxSqlRelationParams &params) const
virtual QSqlError onAfterSave(QxSqlRelationParams &params) 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)
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...