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/*
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* Copyright (C) 2015 Christian Ehringfeld <c.ehringfeld@t-online.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "querybuilder.h"
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#include "database.h"
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#include <QMetaObject>
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#include <QMetaProperty>
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#include "entity.h"
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#include <QRegularExpression>
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#include "entityinstancefactory.h"
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using namespace CuteEntityManager;
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QueryBuilder::QueryBuilder(QSharedPointer<Schema> schema,
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QSharedPointer<Database> database) {
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this->schema = schema;
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this->database = database;
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}
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QueryBuilder::~QueryBuilder() {
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}
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bool QueryBuilder::createTable(const QSharedPointer<Entity> &entity) const {
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return this->createTable(entity.data()->getTablename(),
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this->generateTableDefinition(entity));
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}
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bool QueryBuilder::createTable(const QString &tableName,
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const QHash<QString, QString> &tableDefinition) const {
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bool rc = false;
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this->schema.data()->containsTable(tableName) ? rc = true : rc = false;
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if (!rc) {
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QSqlQuery q = this->database.data()->getQuery(this->createTableQuery(tableName,
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tableDefinition));
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if (this->database.data()->transaction(q)) {
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this->schema.data()->getTableSchema(tableName);
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rc = true;
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}
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}
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return rc;
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}
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QString QueryBuilder::createTableQuery(const QString &tableName,
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const QHash<QString, QString> &tableDefinition) const {
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bool first = true;
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QString s = "CREATE TABLE ";
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s.append(this->schema.data()->quoteTableName(tableName).append(" (\n"));
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auto i = tableDefinition.constBegin();
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while (i != tableDefinition.constEnd()) {
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if (first) {
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first = false;
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} else {
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s.append(", ");
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}
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s.append(this->schema.data()->quoteColumnName(i.key())).append(" " +
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this->getColumnType(
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i.value()));
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++i;
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}
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s.append("\n);");
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return s;
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}
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QString QueryBuilder::renameTable(QString tableName, QString newName) const {
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return "RENAME TABLE " + this->schema.data()->quoteTableName(
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tableName) + " TO " +
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this->schema.data()->quoteTableName(
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newName);
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}
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QString QueryBuilder::dropTable(QString tableName) const {
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return "DROP TABLE " + this->schema.data()->quoteTableName(tableName);
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}
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QString QueryBuilder::truncateTable(QString tableName) const {
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return "TRUNCATE TABLE " + this->schema.data()->quoteTableName(tableName);
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}
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QString QueryBuilder::addColumn(QString tableName, QString columnName,
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QString columnType) const {
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return "ALTER TABLE " + this->schema.data()->quoteTableName(
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tableName) + " ADD " +
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this->schema.data()->quoteColumnName(
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columnName) + " " + this->getColumnType(columnType);
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}
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QString QueryBuilder::dropColumn(QString tableName, QString columName) const {
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return "ALTER TABLE " + this->schema.data()->quoteTableName(
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tableName) + " DROP COLUMN " +
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this->schema.data()->quoteColumnName(columName);
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}
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QString QueryBuilder::renameColumn(QString tableName, QString oldName,
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QString newName) const {
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return "ALTER TABLE " + this->schema.data()->quoteTableName(
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tableName) + " RENAME COLUMN " +
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this->schema.data()->quoteColumnName(oldName) + " TO " +
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this->schema.data()->quoteColumnName(
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newName);
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}
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QString QueryBuilder::alterColumn(QString tableName, QString columnName,
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QString newType) const {
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return "ALTER TABLE " + this->schema.data()->quoteTableName(
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tableName) + " CHANGE " +
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this->schema.data()->quoteColumnName(columnName) + " " +
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this->schema.data()->quoteColumnName(columnName) + this->getColumnType(newType);
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}
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QString QueryBuilder::addPrimaryKey(QString name, QString tableName,
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QStringList columns) const {
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return "ALTER TABLE " + this->schema.data()->quoteTableName(
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tableName) + " ADD CONSTRAINT " +
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this->schema.data()->quoteColumnName(name) + "PRIMARY KEY (" +
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this->buildColumns(columns) + " )";
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}
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QString QueryBuilder::dropPrimaryKey(QString name, QString tableName) const {
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return "ALTER TABLE " + this->schema.data()->quoteTableName(
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tableName) + " DROP CONSTRAINT " +
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this->schema.data()->quoteColumnName(name);
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}
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QString QueryBuilder::addForeignKey(QString name, QString tableName,
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QStringList columns,
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QString refTableName,
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QStringList refColumns, QString deleteConstraint,
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QString updateConstraint) const {
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QString r = "ALTER TABLE " + this->schema.data()->quoteTableName(
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tableName) + "ADD CONSTRAINT " +
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this->schema.data()->quoteColumnName(name)
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+ " FOREIGN KEY (" + this->buildColumns(columns) + ")" + " REFERENCES " +
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this->schema.data()->quoteTableName(
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refTableName) +
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" (" + this->buildColumns(refColumns) + ")";
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if (!deleteConstraint.isEmpty()) {
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r.append(" ON DELETE " + deleteConstraint);
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}
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if (!updateConstraint.isEmpty()) {
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r.append(" ON UPDATE " + updateConstraint);
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}
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return r;
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}
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QString QueryBuilder::dropForeignKey(QString name, QString tableName) const {
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return "ALTER TABLE " + this->schema.data()->quoteTableName(
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tableName) + " DROP CONSTRAINT " +
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this->schema.data()->quoteColumnName(name);
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}
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QString QueryBuilder::createIndex(QString name, QString tableName,
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QStringList columns,
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bool unique) const {
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QString s = (unique ? "CREATE UNIQUE INDEX " : "CREATE INDEX ") +
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this->schema.data()->quoteTableName(
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name) + " ON " + this->schema.data()->quoteTableName(tableName) + " (";
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s.append(this->buildColumns(columns));
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s.append(");");
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return s;
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}
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QString QueryBuilder::dropIndex(QString name, QString tableName) const {
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return "DROP INDEX " + this->schema.data()->quoteTableName(name) + " ON " +
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this->schema.data()->quoteTableName(
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tableName);
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}
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QSharedPointer<Database> QueryBuilder::getDatabase() const {
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return database;
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}
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void QueryBuilder::setDatabase(const QSharedPointer<Database> &value) {
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database = value;
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}
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QString QueryBuilder::buildCreateQuery(QHash<QString, QVariant>::const_iterator
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i,
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QHash<QString, QVariant>::const_iterator end,
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QString &p1, QString &p2) const {
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bool first = true;
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while (i != end) {
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if (!first) {
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p1 += ",";
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p2 += ",";
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} else {
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first = false;
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}
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p1 += this->schema.data()->quoteColumnName(i.key());
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p2 += ":" + i.key();
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++i;
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}
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p1 += ")";
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p2 += ");";
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return p1 + p2;
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}
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QHash<QString, QString> QueryBuilder::generateTableDefinition(
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const QSharedPointer<Entity> &entity)
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const {
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auto map = QHash<QString, QString>();
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auto o = entity.data()->metaObject();
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QHash<QString, Relation> relations = entity.data()->getRelations();
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for (int var = 0; var < o->propertyCount(); ++var) {
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auto m = o->property(var);
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if (m.name() != QString("objectName") && m.isReadable()
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&& !entity.data()->getTransientAttributes().contains(m.name())) {
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if (m.isEnumType()) {
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map.insert(m.name(), this->schema.data()->getTypeMap().data()->value(
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this->schema.data()->TYPE_INTEGER));
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} else if (relations.contains(m.name())) {
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Relation r = relations.value(m.name());
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if (r.getType() == RelationType::MANY_TO_ONE
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|| (r.getType() == RelationType::ONE_TO_ONE
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&& r.getMappedBy().isEmpty())) {
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map.insert(QString(m.name()) + "_id", this->schema.data()->TYPE_BIGINT);
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}
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} else if (entity.data()->getBLOBColumns().contains(m.name())) {
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map.insert(m.name(), this->schema.data()->getTypeMap().data()->value(
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this->schema.data()->TYPE_BINARY));
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} else {
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map.insert(m.name(), this->transformAbstractTypeToRealDbType(
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this->transformTypeToAbstractDbType(
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m.typeName())));
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}
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}
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}
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QString pkType = map.value(entity.data()->getPrimaryKey());
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if (pkType == this->schema.data()->TYPE_BIGINT) {
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map.insert(entity.data()->getPrimaryKey(), this->schema.data()->TYPE_BIGPK);
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} else {
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map.insert(entity.data()->getPrimaryKey(), this->schema.data()->TYPE_PK);
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}
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return map;
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}
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QString QueryBuilder::generateManyToManyTableName(const QSharedPointer<Entity>
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&firstEntity,
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const QSharedPointer<Entity> &secondEntity) const {
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QString first = QString(firstEntity.data()->getClassname());
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QString second = QString(secondEntity.data()->getClassname());
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if (QString::compare(first, second, Qt::CaseSensitive) <= 0) {
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return firstEntity.data()->getTablename() + "_" +
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secondEntity.data()->getTablename();
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} else {
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return secondEntity.data()->getTablename() + "_" +
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firstEntity.data()->getTablename();
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}
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}
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QHash<QString, QHash<QString, QString>> QueryBuilder::generateRelationTables(
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const QSharedPointer<Entity> &entity)
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const {
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auto relations = QHash<QString, QHash<QString, QString>>();
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QHash<QString, Relation> m = entity.data()->getRelations();
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auto props = entity.data()->getMetaProperties();
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for (auto i = m.begin(); i != m.end(); ++i) {
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Relation r = i.value();
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if (r.getType() == MANY_TO_MANY && r.getMappedBy().isEmpty()) {
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QHash<QString, QString> h = QHash<QString, QString>();
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h.insert("id", this->schema.data()->TYPE_BIGPK);
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h.insert(this->generateManyToManyColumnName(entity),
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this->schema.data()->TYPE_BIGINT);
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auto m = props.value(r.getPropertyName());
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Entity *e = EntityInstanceFactory::createInstance(m.type());
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QSharedPointer<Entity> ptr = QSharedPointer<Entity>(e);
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h.insert(this->generateManyToManyColumnName(ptr),
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this->schema.data()->TYPE_BIGINT);
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relations.insert(this->generateManyToManyTableName(entity, ptr), h);
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}
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}
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return relations;
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}
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QString QueryBuilder::transformTypeToAbstractDbType(QString typeName) const {
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QHash<QString, QString> *m = this->schema.data()->getAbstractTypeMap().data();
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if (m->contains(typeName)) {
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return m->value(typeName);
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}
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for (auto i = m->begin(); i != m->end(); ++i) {
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if (i.key().contains(typeName)) {
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return i.value();
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}
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}
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return this->schema.data()->TYPE_TEXT;
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}
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QString QueryBuilder::transformAbstractTypeToRealDbType(
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QString typeName) const {
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return this->schema.data()->getTypeMap().data()->value(typeName);
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}
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QString QueryBuilder::getColumnType(const QString &type) const {
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/**
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* @WARNING
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*/
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QHash<QString, QString> *tMap = this->schema.data()->getTypeMap().data();
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if (tMap->contains(type)) {
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return this->transformAbstractTypeToRealDbType(type);
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}
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//cant believe that this could work in Qt
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//https://github.com/yiisoft/yii2/blob/master/framework/db/QueryBuilder.php
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QRegularExpression reg = QRegularExpression(
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QRegularExpression::escape("/^(\\w+)\((.+?)\\)(.*)$/"));
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reg.optimize();
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QRegularExpressionMatchIterator i = reg.globalMatch(type, 0,
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QRegularExpression::PartialPreferFirstMatch);
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short s = 0;
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bool ok = false;
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QString before = "";
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while (i.hasNext() && s < 2) {
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before = i.next().captured();
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if (tMap->contains(before)) {
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ok = true;
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}
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if (ok) {
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return before.replace(QRegularExpression::escape("/\\(.+\\)/"),
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"(" + i.next().captured() + ")");
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}
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s++;
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}
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reg = QRegularExpression(QRegularExpression::escape("/^(\\w+)\\s+/"));
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i = reg.globalMatch(type, 0, QRegularExpression::PartialPreferFirstMatch);
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if (i.hasNext()) {
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return before.replace(QRegularExpression::escape("/^w+/"), i.next().captured());
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}
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return type;
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}
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/**
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* @brief QueryBuilder::find
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* @param id
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* @param tableName
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* @return
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*/
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QSqlQuery QueryBuilder::find(const qint64 &id, const QString &tableName) const {
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QSqlQuery q = this->database.data()->getQuery("SELECT * FROM " +
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this->schema.data()->quoteTableName(
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tableName) + " WHERE id= :id LIMIT 1;");
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q.bindValue(":id", id);
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return q;
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}
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/**
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* @brief QueryBuilder::findByAttributes
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* @param m
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* @param tableName
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* @param ignoreID
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* @return
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*/
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QSqlQuery QueryBuilder::findByAttributes(const QHash<QString, QVariant> &m,
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const QString &tableName,
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const bool &ignoreID, const qint64 limit, const qint64 offset) const {
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QSqlQuery q = this->database.data()->getQuery("SELECT * FROM " +
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this->schema.data()->quoteTableName(
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tableName) + this->where(m, "AND", ignoreID) + this->limit(limit, offset));
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this->bindValues(m, q, ignoreID);
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return q;
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}
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QSqlQuery QueryBuilder::findByAttributes(const QSharedPointer<Entity> &e,
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bool ignoreID,
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const qint64 limit,
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const qint64 offset) {
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QHash<QString, QVariant> values = this->getEntityAttributes(
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e.data()->getMetaProperties(), e);
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return this->findByAttributes(values, e.data()->getTablename(), ignoreID, limit,
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offset);
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}
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QSqlQuery QueryBuilder::findAll(const QString &tableName) const {
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return this->database->getQuery("SELECT * FROM " +
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this->schema.data()->quoteTableName(
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tableName) + ";");
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}
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QSqlQuery QueryBuilder::remove(const QSharedPointer<Entity> &entity) const {
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QSqlQuery q = this->database->getQuery("DELETE FROM " +
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this->schema.data()->quoteTableName(
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entity.data()->getTablename()) + " WHERE " +
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this->schema.data()->quoteColumnName("id") + "=:id;");
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q.bindValue(":id", entity.data()->getId());
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return q;
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}
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QSqlQuery QueryBuilder::findId(const QSharedPointer<Entity> &entity) const {
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QHash<QString, QVariant> values = this->getEntityAttributes(
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entity.data()->getMetaProperties(),
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entity);
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QSqlQuery q = this->database.data()->getQuery("SELECT " +
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this->schema.data()->quoteColumnName("id")
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+ " FROM " +
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this->schema.data()->quoteTableName(
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entity.data()->getTablename()) + this->where(values,
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"AND", true) + " LIMIT 1");
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this->bindValues(values, q);
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return q;
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}
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QSqlQuery QueryBuilder::count(const QSharedPointer<Entity> &entity,
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bool ignoreID) const {
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QHash<QString, QVariant> values = this->getEntityAttributes(
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entity.data()->getMetaProperties(),
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entity);
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QSqlQuery q = this->database.data()->getQuery("SELECT COUNT(*) FROM " +
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this->schema.data()->quoteTableName(
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entity.data()->getTablename()) + this->where(
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values, "AND", ignoreID));
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this->bindValues(values, q, ignoreID);
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return q;
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}
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QSqlQuery QueryBuilder::count(const QString &tableName) const {
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QSqlQuery q = this->database.data()->getQuery("SELECT COUNT(*) FROM " +
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this->schema.data()->quoteTableName(
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tableName) + ";");
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return q;
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}
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QSqlQuery QueryBuilder::merge(const QSharedPointer<Entity> &entity) const {
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QHash<QString, QVariant> values = this->saveAttributes(entity);
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QSqlQuery q = this->database.data()->getQuery("UPDATE " +
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this->schema.data()->quoteTableName(
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entity->getTablename()) + " SET " + this->attributes(
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values) + " WHERE " + this->schema.data()->quoteColumnName("id") + "=:id;");
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this->bindValues(values, q);
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return q;
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}
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QSqlQuery QueryBuilder::create(const QSharedPointer<Entity> &entity) const {
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QHash<QString, QVariant> values = this->saveAttributes(entity);
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values.remove("id");
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QSqlQuery q = this->database.data()->getQuery();
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QString p1 = "INSERT INTO " + this->schema.data()->quoteTableName(
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entity->getTablename()) + "(";
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QString p2 = "VALUES(";
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if (!values.isEmpty()) {
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q.prepare(this->buildCreateQuery(values.constBegin(), values.constEnd(),
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p1, p2));
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}
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this->bindValues(values, q);
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return q;
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}
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QSqlQuery QueryBuilder::oneToMany(const QString &tableName,
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const QString &attribute,
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const qint64 &id,
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const qint64 &limit) {
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QHash<QString, QVariant> values = QHash<QString, QVariant>();
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values.insert(attribute, id);
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return this->findByAttributes(values, tableName, false, limit);
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}
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QSqlQuery QueryBuilder::manyToMany(const QString &tableName,
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const QString &attribute,
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const qint64 &id,
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const QString &foreignKey, const QString &foreignTable) {
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QSqlQuery q = this->database.data()->getQuery();
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QString sql = "SELECT " +
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this->schema.data()->quoteTableName(
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foreignTable) + ".* FROM " +
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this->schema.data()->quoteTableName(tableName) + " " + this->leftJoin(
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foreignTable, tableName,
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foreignKey) + " WHERE " + this->schema.data()->quoteColumnName(
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attribute) + "=:id;";
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q.prepare(sql);
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q.bindValue(":id", id);
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return q;
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}
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|
|
QSqlQuery QueryBuilder::manyToManyDelete(const QString &tableName,
|
|
const QString &attribute, const qint64 &id) {
|
|
QSqlQuery q = this->database.data()->getQuery();
|
|
QString sql = "DELETE FROM " + this->schema.data()->quoteTableName(
|
|
tableName) + " WHERE " + this->schema.data()->quoteColumnName(
|
|
attribute) + "=:id";
|
|
q.prepare(sql);
|
|
q.bindValue(":id", id);
|
|
return q;
|
|
}
|
|
|
|
QSqlQuery QueryBuilder::manyToManyInsert(const QString &tableName,
|
|
const QString &col1, const QString &col2) const {
|
|
QSqlQuery q = this->database.data()->getQuery();
|
|
QString sql = "INSERT INTO " + this->schema.data()->quoteTableName(
|
|
tableName) + "(" + col1 + "," + col2 + ")"
|
|
+ "VALUES(?, ?);";
|
|
q.prepare(sql);
|
|
return q;
|
|
}
|
|
|
|
QString QueryBuilder::leftJoin(const QString &foreignTable,
|
|
const QString &tableName,
|
|
const QString &foreignKey) {
|
|
return "LEFT JOIN " + this->schema.data()->quoteTableName(
|
|
foreignTable) + " ON " +
|
|
this->schema.data()->quoteColumnName(foreignTable + ".id") + "=" +
|
|
this->schema.data()->quoteColumnName(
|
|
tableName + "." + foreignKey);
|
|
}
|
|
|
|
QString QueryBuilder::limit(const qint64 &limit, const qint64 &offset) const {
|
|
QString s = "";
|
|
if (limit > 0) {
|
|
s.append(" LIMIT ").append(QString::number(limit));
|
|
}
|
|
if (offset > 0) {
|
|
s.append(" OFFSET ").append(QString::number(offset));
|
|
}
|
|
return s;
|
|
}
|
|
|
|
QString QueryBuilder::generateManyToManyColumnName(const QSharedPointer<Entity>
|
|
&entity) const {
|
|
return QString(entity.data()->metaObject()->className()) + QString("_id");
|
|
}
|
|
|
|
QSqlQuery QueryBuilder::getQuery() const {
|
|
return this->database.data()->getQuery();
|
|
}
|
|
|
|
QHash<QString, QVariant> QueryBuilder::saveAttributes(const
|
|
QSharedPointer<Entity> &entity) const {
|
|
auto props = entity.data()->getMetaProperties();
|
|
auto values = this->getEntityAttributes(props, entity);
|
|
auto relValues = this->getManyToOneAttributes(props, entity);
|
|
auto iterator = relValues.constBegin();
|
|
while (iterator != relValues.constEnd()) {
|
|
values.insert(iterator.key(), iterator.value());
|
|
++iterator;
|
|
}
|
|
return values;
|
|
}
|
|
|
|
QHash<QString, QVariant> QueryBuilder::getEntityAttributes(
|
|
const QHash<QString, QMetaProperty>
|
|
&props,
|
|
const QSharedPointer<Entity> &entity) const {
|
|
Entity *e = entity.data();
|
|
auto map = QHash<QString, QVariant>();
|
|
auto transientAttrs = e->getTransientAttributes();
|
|
auto relations = e->getRelations();
|
|
auto i = props.constBegin();
|
|
while (i != props.constEnd()) {
|
|
if (!transientAttrs.contains(i.key()) && !relations.contains(i.key())) {
|
|
map.insert(i.key(), i.value().read(e));
|
|
}
|
|
++i;
|
|
}
|
|
return map;
|
|
}
|
|
|
|
QHash<QString, QVariant> QueryBuilder::getManyToOneAttributes(
|
|
const QHash<QString, QMetaProperty>
|
|
&props,
|
|
const QSharedPointer<Entity> &entity) const {
|
|
Entity *e = entity.data();
|
|
auto map = QHash<QString, QVariant>();
|
|
auto relations = e->getRelations();
|
|
auto i = relations.constBegin();
|
|
while (i != relations.constEnd()) {
|
|
Relation r = i.value();
|
|
if (r.getType() == MANY_TO_ONE && props.contains(i.key())
|
|
|| (r.getType() == ONE_TO_ONE && r.getMappedBy().isEmpty())) {
|
|
auto v = props.value(i.key()).read(e);
|
|
if (v.canConvert<Entity *>()) {
|
|
this->insertRelationId(qvariant_cast<Entity *>(v), map, i.key());
|
|
} else if (v.canConvert<QSharedPointer<Entity>>()) {
|
|
this->insertRelationId(qvariant_cast<QSharedPointer<Entity>>(v).data(), map,
|
|
i.key());
|
|
} else if (v.canConvert<QPointer<Entity>>()) {
|
|
this->insertRelationId(qvariant_cast<QPointer<Entity>>(v).data(), map, i.key());
|
|
}
|
|
++i;
|
|
}
|
|
}
|
|
return map;
|
|
}
|
|
|
|
void QueryBuilder::insertRelationId(const Entity *e,
|
|
QHash<QString, QVariant> &map,
|
|
QString relName) const {
|
|
if (e && e->getId() > -1) {
|
|
map.insert(relName + "_id", e->getId());
|
|
}
|
|
}
|
|
|
|
QString QueryBuilder::buildColumns(const QStringList &columns) const {
|
|
QString r = "";
|
|
bool first = true;
|
|
for (int var = 0; var < columns.size(); ++var) {
|
|
if (!first) {
|
|
r.append(",");
|
|
} else {
|
|
first = false;
|
|
}
|
|
r.append(columns.at(var));
|
|
}
|
|
return r;
|
|
}
|
|
|
|
void QueryBuilder::bindValues(const QHash<QString, QVariant> &h, QSqlQuery &q,
|
|
bool ignoreID) const {
|
|
QHash<QString, QVariant>::const_iterator i = h.constBegin();
|
|
while (i != h.constEnd()) {
|
|
if (!ignoreID || (ignoreID && !(i.key() == "id"))) {
|
|
q.bindValue(":" + i.key(), i.value());
|
|
}
|
|
++i;
|
|
}
|
|
}
|
|
|
|
QString QueryBuilder::where(const QSharedPointer<Entity> &entity,
|
|
QString conjunction,
|
|
bool ignoreID) const {
|
|
return this->where(this->getEntityAttributes(entity.data()->getMetaProperties(),
|
|
entity),
|
|
conjunction, ignoreID);
|
|
}
|
|
|
|
QString QueryBuilder::where(const QHash<QString, QVariant> &m,
|
|
const QString &conjunction,
|
|
bool ignoreID) const {
|
|
if (m.size() == 0 || (ignoreID && m.contains("id") && m.size() == 1)) {
|
|
return "";
|
|
}
|
|
return " WHERE " + this->attributes(m, conjunction, ignoreID);
|
|
}
|
|
|
|
QString QueryBuilder::attributes(const QHash<QString, QVariant> &m,
|
|
const QString &conjunction,
|
|
bool ignoreID) const {
|
|
QString rc = "";
|
|
if (!m.isEmpty()) {
|
|
QHash<QString, QVariant>::const_iterator i = m.constBegin();
|
|
while (i != m.constEnd()) {
|
|
if (!ignoreID || (ignoreID && !(i.key() == "id"))) {
|
|
if (!(rc == "")) {
|
|
rc += " " + conjunction + " ";
|
|
}
|
|
rc += this->schema.data()->quoteColumnName(i.key()) + "=:" + i.key();
|
|
}
|
|
++i;
|
|
}
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
QSharedPointer<Schema> QueryBuilder::getSchema() const {
|
|
return schema;
|
|
}
|
|
|
|
void QueryBuilder::setSchema(const QSharedPointer<Schema> &value) {
|
|
schema = value;
|
|
}
|