/*! \reimp */ QString QSqlRelationalTableModel::orderByClause() const { Q_D(const QSqlRelationalTableModel); const QSqlRelation rel = d->relations.value(d->sortColumn).rel; if (!rel.isValid()) return QSqlTableModel::orderByClause(); QString f = d->fullyQualifiedFieldName(Sql::relTablePrefix(d->sortColumn), rel.displayColumn()); f = d->sortOrder == Qt::AscendingOrder ? Sql::asc(f) : Sql::desc(f); return Sql::orderBy(f); }
/*! \reimp */ QString QSqlRelationalTableModel::orderByClause() const { Q_D(const QSqlRelationalTableModel); const QSqlRelation rel = d->relations.value(d->sortColumn).rel; if (!rel.isValid()) return QSqlTableModel::orderByClause(); QString s = QLatin1String("ORDER BY "); s.append(d->relationField(QLatin1String("relTblAl_") + QString::number(d->sortColumn), rel.displayColumn())); s += d->sortOrder == Qt::AscendingOrder ? QLatin1String(" ASC") : QLatin1String(" DESC"); return s; }
/*! \reimp */ QString QSqlRelationalTableModel::selectStatement() const { Q_D(const QSqlRelationalTableModel); QString query; if (tableName().isEmpty()) return query; if (d->relations.isEmpty()) return QSqlTableModel::selectStatement(); QString tList; QString fList; QString where; QSqlRecord rec = d->baseRec; QStringList tables; const QRelation nullRelation; // Count how many times each field name occurs in the record QHash<QString, int> fieldNames; QStringList fieldList; for (int i = 0; i < rec.count(); ++i) { QSqlRelation relation = d->relations.value(i, nullRelation).rel; QString name; if (relation.isValid()) { // Count the display column name, not the original foreign key name = relation.displayColumn(); if (d->db.driver()->isIdentifierEscaped(name, QSqlDriver::FieldName)) name = d->db.driver()->stripDelimiters(name, QSqlDriver::FieldName); QSqlRecord rec = database().record(relation.tableName()); for (int i = 0; i < rec.count(); ++i) { if (name.compare(rec.fieldName(i), Qt::CaseInsensitive) == 0) { name = rec.fieldName(i); break; } } } else name = rec.fieldName(i); fieldNames.insert(name, fieldNames.value(name, 0) + 1); fieldList.append(name); } for (int i = 0; i < rec.count(); ++i) { QSqlRelation relation = d->relations.value(i, nullRelation).rel; if (relation.isValid()) { QString relTableAlias = QString::fromLatin1("relTblAl_%1").arg(i); if (!fList.isEmpty()) fList.append(QLatin1String(", ")); fList.append(d->relationField(relTableAlias,relation.displayColumn())); // If there are duplicate field names they must be aliased if (fieldNames.value(fieldList[i]) > 1) { QString relTableName = relation.tableName().section(QChar::fromLatin1('.'), -1, -1); if (d->db.driver()->isIdentifierEscaped(relTableName, QSqlDriver::TableName)) relTableName = d->db.driver()->stripDelimiters(relTableName, QSqlDriver::TableName); QString displayColumn = relation.displayColumn(); if (d->db.driver()->isIdentifierEscaped(displayColumn, QSqlDriver::FieldName)) displayColumn = d->db.driver()->stripDelimiters(displayColumn, QSqlDriver::FieldName); fList.append(QString::fromLatin1(" AS %1_%2_%3").arg(relTableName).arg(displayColumn).arg(fieldNames.value(fieldList[i]))); fieldNames.insert(fieldList[i], fieldNames.value(fieldList[i])-1); } // this needs fixing!! the below if is borken. tables.append(relation.tableName().append(QLatin1Char(' ')).append(relTableAlias)); if(!where.isEmpty()) where.append(QLatin1String(" AND ")); where.append(d->relationField(tableName(), d->db.driver()->escapeIdentifier(rec.fieldName(i), QSqlDriver::FieldName))); where.append(QLatin1String(" = ")); where.append(d->relationField(relTableAlias, relation.indexColumn())); } else { if (!fList.isEmpty()) fList.append(QLatin1String(", ")); fList.append(d->relationField(tableName(), d->db.driver()->escapeIdentifier(rec.fieldName(i), QSqlDriver::FieldName))); } } if (!tables.isEmpty()) tList.append(tables.join(QLatin1String(", "))); if (fList.isEmpty()) return query; if(!tList.isEmpty()) tList.prepend(QLatin1String(", ")); tList.prepend(tableName()); query.append(QLatin1String("SELECT ")); query.append(fList).append(QLatin1String(" FROM ")).append(tList); qAppendWhereClause(query, where, filter()); QString orderBy = orderByClause(); if (!orderBy.isEmpty()) query.append(QLatin1Char(' ')).append(orderBy); return query; }
bool QRelation::isValid() { return (rel.isValid() && m_parent != NULL); }
/*! \reimp */ QString QSqlRelationalTableModel::selectStatement() const { Q_D(const QSqlRelationalTableModel); if (tableName().isEmpty()) return QString(); if (d->relations.isEmpty()) return QSqlTableModel::selectStatement(); // Count how many times each field name occurs in the record QHash<QString, int> fieldNames; QStringList fieldList; for (int i = 0; i < d->baseRec.count(); ++i) { QSqlRelation relation = d->relations.value(i).rel; QString name; if (relation.isValid()) { // Count the display column name, not the original foreign key name = relation.displayColumn(); if (d->db.driver()->isIdentifierEscaped(name, QSqlDriver::FieldName)) name = d->db.driver()->stripDelimiters(name, QSqlDriver::FieldName); const QSqlRecord rec = database().record(relation.tableName()); for (int i = 0; i < rec.count(); ++i) { if (name.compare(rec.fieldName(i), Qt::CaseInsensitive) == 0) { name = rec.fieldName(i); break; } } } else { name = d->baseRec.fieldName(i); } fieldNames[name] = fieldNames.value(name, 0) + 1; fieldList.append(name); } QString fList; QString conditions; QString from = Sql::from(tableName()); for (int i = 0; i < d->baseRec.count(); ++i) { QSqlRelation relation = d->relations.value(i).rel; const QString tableField = d->fullyQualifiedFieldName(tableName(), d->db.driver()->escapeIdentifier(d->baseRec.fieldName(i), QSqlDriver::FieldName)); if (relation.isValid()) { const QString relTableAlias = Sql::relTablePrefix(i); QString displayTableField = d->fullyQualifiedFieldName(relTableAlias, relation.displayColumn()); // Duplicate field names must be aliased if (fieldNames.value(fieldList[i]) > 1) { QString relTableName = relation.tableName().section(QChar::fromLatin1('.'), -1, -1); if (d->db.driver()->isIdentifierEscaped(relTableName, QSqlDriver::TableName)) relTableName = d->db.driver()->stripDelimiters(relTableName, QSqlDriver::TableName); QString displayColumn = relation.displayColumn(); if (d->db.driver()->isIdentifierEscaped(displayColumn, QSqlDriver::FieldName)) displayColumn = d->db.driver()->stripDelimiters(displayColumn, QSqlDriver::FieldName); const QString alias = QString::fromLatin1("%1_%2_%3").arg(relTableName).arg(displayColumn).arg(fieldNames.value(fieldList[i])); displayTableField = Sql::as(displayTableField, alias); --fieldNames[fieldList[i]]; } fList = Sql::comma(fList, displayTableField); // Join related table const QString tblexpr = Sql::concat(relation.tableName(), relTableAlias); const QString relTableField = d->fullyQualifiedFieldName(relTableAlias, relation.indexColumn()); const QString cond = Sql::eq(tableField, relTableField); if (d->joinMode == QSqlRelationalTableModel::InnerJoin) { // FIXME: InnerJoin code is known to be broken. // Use LeftJoin mode if you want correct behavior. from = Sql::comma(from, tblexpr); conditions = Sql::et(conditions, cond); } else { from = Sql::concat(from, Sql::leftJoin(tblexpr)); from = Sql::concat(from, Sql::on(cond)); } } else { fList = Sql::comma(fList, tableField); } } if (fList.isEmpty()) return QString(); const QString stmt = Sql::concat(Sql::select(fList), from); const QString where = Sql::where(Sql::et(Sql::paren(conditions), Sql::paren(filter()))); return Sql::concat(Sql::concat(stmt, where), orderByClause()); }
/*! \reimp */ QString QSqlRelationalTableModel::selectStatement() const { Q_D(const QSqlRelationalTableModel); QString query; if (tableName().isEmpty()) return query; if (d->relations.isEmpty()) return QSqlTableModel::selectStatement(); QString tList; QString fList; QString where; QSqlRecord rec = d->baseRec; QStringList tables; const QRelation nullRelation; // Count how many times each field name occurs in the record QHash<QString, int> fieldNames; for (int i = 0; i < rec.count(); ++i) { QSqlRelation relation = d->relations.value(i, nullRelation).rel; QString name; if (relation.isValid()) // Count the display column name, not the original foreign key name = relation.displayColumn(); else name = rec.fieldName(i); fieldNames.insert(name, fieldNames.value(name, 0) + 1); } for (int i = 0; i < rec.count(); ++i) { QSqlRelation relation = d->relations.value(i, nullRelation).rel; if (relation.isValid()) { QString relTableAlias = QString::fromLatin1("relTblAl_%1").arg(i); fList.append(d->escapedRelationField(relTableAlias, relation.displayColumn())); // If there are duplicate field names they must be aliased if (fieldNames.value(relation.displayColumn()) > 1) fList.append(QString::fromLatin1(" AS %1_%2").arg(relation.tableName()).arg(relation.displayColumn())); fList.append(QLatin1Char(',')); if (!tables.contains(relation.tableName())) tables.append(d->db.driver()->escapeIdentifier(relation.tableName(), QSqlDriver::TableName).append(QLatin1String(" ")).append( d->db.driver()->escapeIdentifier(relTableAlias, QSqlDriver::TableName))); where.append(d->escapedRelationField(tableName(), rec.fieldName(i))); where.append(QLatin1Char('=')); where.append(d->escapedRelationField(relTableAlias, relation.indexColumn())); where.append(QLatin1String(" AND ")); } else { fList.append(d->escapedRelationField(tableName(), rec.fieldName(i))); fList.append(QLatin1Char(',')); } } if (!tables.isEmpty()) tList.append(tables.join(QLatin1String(","))).append(QLatin1String(",")); if (fList.isEmpty()) return query; tList.prepend(QLatin1Char(',')).prepend(d->db.driver()->escapeIdentifier(tableName(), QSqlDriver::TableName)); // truncate tailing comma tList.chop(1); fList.chop(1); query.append(QLatin1String("SELECT ")); query.append(fList).append(QLatin1String(" FROM ")).append(tList); if (!where.isEmpty()) where.chop(5); qAppendWhereClause(query, where, filter()); QString orderBy = orderByClause(); if (!orderBy.isEmpty()) query.append(QLatin1Char(' ')).append(orderBy); return query; }