explicit NoEditDelegate(QObject* parent=nullptr): QStyledItemDelegate(parent) {}

QWidget* createEditor(QWidget* /* parent */, const QStyleOptionViewItem& /* option */, const QModelIndex& /* index */) const override {

return nullptr;

}

: QDialog(parent),

ui(new Ui::EditTableDialog),

pdb(db),

curTable(tableName),

m_table(tableName.name()),

m_bNewTable(createTable),

m_sRestorePointName(pdb.generateSavepointName("edittable"))

{

// Create UI

ui->setupUi(this);

ui->widgetExtension->setVisible(false);

connect(ui->treeWidget, &QTreeWidget::itemChanged, this, &EditTableDialog::fieldItemChanged);

connect(ui->tableIndexConstraints, &QTableWidget::itemChanged, this, &EditTableDialog::indexConstraintItemChanged);

connect(ui->tableForeignKeys, &QTableWidget::itemChanged, this, &EditTableDialog::foreignKeyItemChanged);

connect(ui->tableCheckConstraints, &QTableWidget::itemChanged, this, &EditTableDialog::checkConstraintItemChanged);

// Set item delegate for foreign key column

ui->treeWidget->setItemDelegateForColumn(kForeignKey, new ForeignKeyEditorDelegate(db, m_table, this));

ui->tableForeignKeys->setItemDelegateForColumn(kForeignKeyReferences, new ForeignKeyEditorDelegate(db, m_table, this));

// Disallow edition of checkable columns or columns with combo-boxes

ui->treeWidget->setItemDelegateForColumn(kType, new NoEditDelegate(this));

ui->treeWidget->setItemDelegateForColumn(kNotNull, new NoEditDelegate(this));

ui->treeWidget->setItemDelegateForColumn(kPrimaryKey, new NoEditDelegate(this));

ui->treeWidget->setItemDelegateForColumn(kAutoIncrement, new NoEditDelegate(this));

ui->treeWidget->setItemDelegateForColumn(kUnique, new NoEditDelegate(this));

ui->treeWidget->setItemDelegateForColumn(kCollation, new NoEditDelegate(this));

// Set up popup menu for adding constraints

QMenu* constraint_menu = new QMenu(this);

constraint_menu->addAction(ui->actionAddPrimaryKey);

constraint_menu->addAction(ui->actionAddUniqueConstraint);

connect(ui->actionAddPrimaryKey, &QAction::triggered, this, [this]() { addIndexConstraint(true); });

connect(ui->actionAddUniqueConstraint, &QAction::triggered, this, [this]() { addIndexConstraint(false); });

ui->buttonAddIndexConstraint->setMenu(constraint_menu);

// Get list of all collations

db.executeSQL("PRAGMA collation_list;", false, true, [this](int column_count, std::vector<QByteArray> columns, std::vector<QByteArray>) -> bool {

if(column_count >= 2)

m_collationList.push_back(columns.at(1));

return false;

});

if(!m_collationList.contains(""))

m_collationList.push_back("");

m_collationList.sort();

// Editing an existing table?

if(m_bNewTable == false)

{

// Existing table, so load and set the current layout

m_table = *pdb.getTableByName(curTable);

ui->labelEditWarning->setVisible(!m_table.fullyParsed());

// Initialise the list of tracked columns for table layout changes

for(const auto& field : m_table.fields)

trackColumns[QString::fromStdString(field.name())] = QString::fromStdString(field.name());

// Set without rowid checkbox and schema dropdown. No need to trigger any events here as we're only loading a table exactly as it is stored by SQLite, so no need

// for error checking etc.

ui->checkWithoutRowid->blockSignals(true);

ui->checkWithoutRowid->setChecked(m_table.withoutRowidTable());

ui->checkWithoutRowid->blockSignals(false);

ui->checkStrict->blockSignals(true);

ui->checkStrict->setChecked(m_table.isStrict());

ui->checkStrict->blockSignals(false);

ui->comboSchema->blockSignals(true);

for(const auto& n : pdb.schemata) // Load list of database schemata

ui->comboSchema->addItem(QString::fromStdString(n.first));

ui->comboSchema->setCurrentText(QString::fromStdString(curTable.schema()));

ui->comboSchema->blockSignals(false);

if(m_table.primaryKey())

{

ui->checkWithoutRowid->blockSignals(true);

ui->comboOnConflict->setCurrentText(QString::fromStdString(m_table.primaryKey()->conflictAction()).toUpper());

ui->checkWithoutRowid->blockSignals(false);

}

populateFields();

populateIndexConstraints();

populateForeignKeys();

populateCheckConstraints();

} else {

for(const auto& n : pdb.schemata) // Load list of database schemata

ui->comboSchema->addItem(QString::fromStdString(n.first));

ui->comboSchema->setCurrentText("main"); // Always create tables in the main schema by default

ui->labelEditWarning->setVisible(false);

}

// Enable/disable remove constraint button depending on whether a constraint is selected

connect(ui->tableIndexConstraints, &QTableWidget::itemSelectionChanged, this, [this]() {

bool hasSelection = ui->tableIndexConstraints->selectionModel()->hasSelection();

ui->buttonRemoveIndexConstraint->setEnabled(hasSelection);

});

connect(ui->tableForeignKeys, &QTableWidget::itemSelectionChanged, this, [this]() {

bool hasSelection = ui->tableForeignKeys->selectionModel()->hasSelection();

ui->buttonRemoveForeignKey->setEnabled(hasSelection);

});

connect(ui->tableCheckConstraints, &QTableWidget::itemSelectionChanged, this, [this]() {

bool hasSelection = ui->tableCheckConstraints->selectionModel()->hasSelection();

ui->buttonRemoveCheckConstraint->setEnabled(hasSelection);

});

// And create a savepoint

pdb.setSavepoint(m_sRestorePointName);

// Update UI

ui->editTableName->setText(QString::fromStdString(curTable.name()));

updateColumnWidth();

// Allow editing of constraint columns by double clicking the columns column of the constraints table

connect(ui->tableIndexConstraints, &QTableWidget::itemDoubleClicked, this, &EditTableDialog::indexConstraintItemDoubleClicked);

connect(ui->tableForeignKeys, &QTableWidget::itemDoubleClicked, this, &EditTableDialog::foreignKeyItemDoubleClicked);

// (De-)activate fields

checkInput();

ui->sqlTextEdit->setReadOnly(true);

{

if((evt->modifiers() & Qt::ControlModifier)

&& (evt->key() == Qt::Key_Enter || evt->key() == Qt::Key_Return))

{

accept();

return;

}

if(evt->key() == Qt::Key_Enter || evt->key() == Qt::Key_Return)

return;

QDialog::keyPressEvent(evt);

{

ui->treeWidget->setColumnWidth(kName, 190);

ui->treeWidget->setColumnWidth(kType, 150);

ui->treeWidget->setColumnWidth(kNotNull, 25);

ui->treeWidget->setColumnWidth(kPrimaryKey, 25);

ui->treeWidget->setColumnWidth(kAutoIncrement, 25);

ui->treeWidget->setColumnWidth(kUnique, 25);

ui->treeWidget->setColumnWidth(kForeignKey, 500);

ui->tableIndexConstraints->setColumnWidth(kConstraintColumns, 180);

ui->tableIndexConstraints->setColumnWidth(kConstraintType, 130);

ui->tableIndexConstraints->setColumnWidth(kConstraintName, 120);

ui->tableIndexConstraints->setColumnWidth(kConstraintSql, 300);

ui->tableForeignKeys->setColumnWidth(kForeignKeyColumns, 120);

ui->tableForeignKeys->setColumnWidth(kForeignKeyName, 120);

ui->tableForeignKeys->setColumnWidth(kForeignKeyReferences, 300);

ui->tableForeignKeys->setColumnWidth(kForeignKeySql, 300);

ui->tableCheckConstraints->setColumnWidth(kCheckConstraintCheck, 400);

ui->tableCheckConstraints->setColumnWidth(kCheckConstraintName, 120);

ui->tableCheckConstraints->setColumnWidth(kCheckConstraintSql, 300);

{

// Disable the itemChanged signal or the table item will be updated while filling the treewidget

ui->treeWidget->blockSignals(true);

ui->treeWidget->clear();

const auto& fields = m_table.fields;

const auto pk = m_table.primaryKey();

const auto pkColumns = m_table.primaryKeyColumns();

for(const sqlb::Field& f : fields)

{

QTreeWidgetItem *tbitem = new QTreeWidgetItem(ui->treeWidget);

tbitem->setFlags(tbitem->flags() | Qt::ItemIsEditable);

tbitem->setText(kName, QString::fromStdString(f.name()));

QComboBox* typeBox = new QComboBox(ui->treeWidget);

typeBox->setProperty("column", QString::fromStdString(f.name()));

typeBox->setEditable(!m_table.isStrict()); // Strict tables do not allow arbitrary types

typeBox->addItems(m_table.isStrict() ? DBBrowserDB::DatatypesStrict : DBBrowserDB::Datatypes);

int index = typeBox->findText(QString::fromStdString(f.type()), Qt::MatchFixedString);

if(index == -1)

{

// non standard named type

typeBox->addItem(QString::fromStdString(f.type()));

index = typeBox->count() - 1;

}

typeBox->setCurrentIndex(index);

typeBox->installEventFilter(this);

connect(typeBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateTypeAndCollation()));

ui->treeWidget->setItemWidget(tbitem, kType, typeBox);

tbitem->setCheckState(kNotNull, f.notnull() ? Qt::Checked : Qt::Unchecked);

tbitem->setCheckState(kPrimaryKey, pk && contains(pkColumns, f.name()) ? Qt::Checked : Qt::Unchecked);

tbitem->setCheckState(kAutoIncrement, pk && pk->autoIncrement() && contains(pkColumns, f.name()) ? Qt::Checked : Qt::Unchecked);

tbitem->setCheckState(kUnique, f.unique() ? Qt::Checked : Qt::Unchecked);

// For the default value check if it is surrounded by parentheses and if that's the case

// add a '=' character before the entire string to match the input format we're expecting

// from the user when using functions in the default value field.

if(!f.defaultValue().empty() && f.defaultValue().front() == '(' && f.defaultValue().back() == ')')

tbitem->setText(kDefault, "=" + QString::fromStdString(f.defaultValue()));

else

tbitem->setText(kDefault, QString::fromStdString(f.defaultValue()));

tbitem->setText(kCheck, QString::fromStdString(f.check()));

QComboBox* collationBox = new QComboBox(ui->treeWidget);

collationBox->setProperty("column", QString::fromStdString(f.name()));

collationBox->addItems(m_collationList);

index = collationBox->findText(QString::fromStdString(f.collation()), Qt::MatchCaseSensitive);

if(index == -1)

{

// some non-existing collation

collationBox->addItem(QString::fromStdString(f.collation()));

index = collationBox->count() - 1;

}

collationBox->setCurrentIndex(index);

collationBox->installEventFilter(this);

connect(collationBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateTypeAndCollation()));

ui->treeWidget->setItemWidget(tbitem, kCollation, collationBox);

auto fk = m_table.foreignKey({f.name()});

if(fk)

tbitem->setText(kForeignKey, QString::fromStdString(fk->toString()));

ui->treeWidget->addTopLevelItem(tbitem);

}

// and reconnect

ui->treeWidget->blockSignals(false);

{

// Disable the itemChanged signal or the table item will be updated while filling the treewidget

ui->tableIndexConstraints->blockSignals(true);

const auto& indexConstraints = m_table.indexConstraints();

ui->tableIndexConstraints->setRowCount(static_cast<int>(indexConstraints.size()));

int row = 0;

for(const auto& it : indexConstraints)

{

// Columns

QTableWidgetItem* column = new QTableWidgetItem(QString::fromStdString(sqlb::joinStringVector(it.first, ",")));

column->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

column->setData(Qt::UserRole, QVariant::fromValue(it.first)); // Remember columns of constraint object. This is used for modifying it later

ui->tableIndexConstraints->setItem(row, kConstraintColumns, column);

// Type

QComboBox* type = new QComboBox(this);

type->addItem(tr("Primary Key"), "pk");

type->addItem(tr("Unique"), "u");

type->setCurrentIndex(it.second->isPrimaryKey() ? 0 : 1);

connect(type, static_cast<void(QComboBox::*)(int)>(&QComboBox::currentIndexChanged), this, [this, type, it](int index) {

// Handle change of constraint type. Effectively this means removing the old constraint and replacing it by an entirely new one.

// Make sure there is only one primary key at a time

if(index == 0 && m_table.primaryKey())

{

QMessageBox::warning(this, qApp->applicationName(), tr("There can only be one primary key for each table. Please modify the existing primary "

"key instead."));

// Set combo box back to original constraint type

type->blockSignals(true);

type->setCurrentIndex(it.second->isPrimaryKey() ? 0 : 1);

type->blockSignals(false);

return;

}

// Remove old constraint

m_table.removeConstraint(it.second);

// Add new constraint depending on selected type

if(type->itemData(index).toString() == "pk")

{

auto pk = std::make_shared<sqlb::PrimaryKeyConstraint>();

pk->setName(it.second->name());

m_table.addConstraint(it.first, pk);

} else if(type->itemData(index).toString() == "u") {

auto u = std::make_shared<sqlb::UniqueConstraint>();

u->setName(it.second->name());

m_table.addConstraint(it.first, u);

}

// Update SQL and view

populateFields();

populateIndexConstraints();

updateSqlText();

});

QTableWidgetItem* typeColumn = new QTableWidgetItem();

typeColumn->setData(Qt::UserRole, QVariant::fromValue<std::shared_ptr<sqlb::UniqueConstraint>>(it.second)); // Remember address of constraint object. This is used for modifying it later

ui->tableIndexConstraints->setCellWidget(row, kConstraintType, type);

ui->tableIndexConstraints->setItem(row, kConstraintType, typeColumn);

// Name

QTableWidgetItem* name = new QTableWidgetItem(QString::fromStdString(it.second->name()));

name->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsEditable);

ui->tableIndexConstraints->setItem(row, kConstraintName, name);

// SQL

QTableWidgetItem* sql = new QTableWidgetItem(QString::fromStdString(it.second->toSql(it.first)));

sql->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

ui->tableIndexConstraints->setItem(row, kConstraintSql, sql);

row++;

}

ui->tableIndexConstraints->blockSignals(false);

{

// Disable the itemChanged signal or the table item will be updated while filling the treewidget

ui->tableForeignKeys->blockSignals(true);

const auto& foreignKeys = m_table.foreignKeys();

ui->tableForeignKeys->setRowCount(static_cast<int>(foreignKeys.size()));

int row = 0;

for(const auto& it : foreignKeys)

{

// Columns

QTableWidgetItem* columns = new QTableWidgetItem(QString::fromStdString(sqlb::joinStringVector(it.first, ",")));

columns->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsEditable);

columns->setData(Qt::UserRole, QVariant::fromValue(it.first)); // Remember columns of constraint object. This is used for modifying it later

ui->tableForeignKeys->setItem(row, kForeignKeyColumns, columns);

// Name

QTableWidgetItem* name = new QTableWidgetItem(QString::fromStdString(it.second->name()));

name->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsEditable);

ui->tableForeignKeys->setItem(row, kForeignKeyName, name);

// References

QTableWidgetItem* references = new QTableWidgetItem(QString::fromStdString(it.second->toString()));

references->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsEditable);

references->setData(Qt::UserRole, QVariant::fromValue(it.second)); // Remember address of constraint object. This is used for modifying it later

ui->tableForeignKeys->setItem(row, kForeignKeyReferences, references);

// SQL

QTableWidgetItem* sql = new QTableWidgetItem(QString::fromStdString(it.second->toSql(it.first)));

sql->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

ui->tableForeignKeys->setItem(row, kForeignKeySql, sql);

row++;

}

ui->tableForeignKeys->blockSignals(false);

{

// Disable the itemChanged signal or the table item will be updated while filling the treewidget

ui->tableCheckConstraints->blockSignals(true);

const auto& checkConstraints = m_table.checkConstraints();

ui->tableCheckConstraints->setRowCount(static_cast<int>(checkConstraints.size()));

int row = 0;

for(const auto& it : checkConstraints)

{

// Check

QTableWidgetItem* check = new QTableWidgetItem(QString::fromStdString(it->expression()));

check->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsEditable);

check->setData(Qt::UserRole, QVariant::fromValue(it)); // Remember address of constraint object. This is used for modifying it later

ui->tableCheckConstraints->setItem(row, kCheckConstraintCheck, check);

// Name

QTableWidgetItem* name = new QTableWidgetItem(QString::fromStdString(it->name()));

name->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsEditable);

ui->tableCheckConstraints->setItem(row, kCheckConstraintName, name);

// SQL

QTableWidgetItem* sql = new QTableWidgetItem(QString::fromStdString(it->toSql()));

sql->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

ui->tableCheckConstraints->setItem(row, kCheckConstraintSql, sql);

row++;

}

ui->tableCheckConstraints->blockSignals(false);

{

// Are we editing an already existing table or designing a new one? In the first case there is a table name set,

// in the latter the current table name is empty

if(m_bNewTable)

{

// Creation of new table

if(!pdb.executeSQL(m_table.sql(ui->comboSchema->currentText().toStdString())))

{

QMessageBox::warning(

this,

QApplication::applicationName(),

tr("Error creating table. Message from database engine:\n%1").arg(pdb.lastError()));

return;

}

} else {

// Editing of old table

// Apply all changes to the actual table in the database

if(!pdb.alterTable(curTable, m_table, trackColumns, ui->comboSchema->currentText().toStdString()))

{

QMessageBox::warning(this, QApplication::applicationName(), pdb.lastError());

return;

}

}

QDialog::accept();

{

// Then rollback to our savepoint

pdb.revertToSavepoint(m_sRestorePointName);

QDialog::reject();

{

std::string normTableName = ui->editTableName->text().toStdString();

bool valid = true;

if(normTableName.empty())

valid = false;

if(ui->treeWidget->topLevelItemCount() == 0)

valid = false;

if (normTableName != m_table.name()) {

const std::string oldTableName = m_table.name();

m_table.setName(normTableName);

// update fk's that refer to table itself recursively

const auto& fields = m_table.fields;

for(const sqlb::Field& f : fields) {

auto fk = m_table.foreignKey({f.name()});

if(fk && oldTableName == fk->table())

fk->setTable(normTableName);

}

populateFields();

}

updateSqlText();

ui->buttonBox->button(QDialogButtonBox::Ok)->setEnabled(valid);

{

// Get sender combo box and retrieve field name from it

QComboBox* combo = qobject_cast<QComboBox*>(object);

if(!combo)

return;

QString column = combo->property("column").toString();

// Get type *and* collation combo box for this field

auto item = ui->treeWidget->findItems(column, Qt::MatchExactly, kName);

if(item.size() != 1)

return;

QComboBox* typeBox = qobject_cast<QComboBox*>(ui->treeWidget->itemWidget(item.front(), kType));

QComboBox* collationBox = qobject_cast<QComboBox*>(ui->treeWidget->itemWidget(item.front(), kCollation));

// Update table

if(typeBox && collationBox)

{

QString type = typeBox->currentText();

QString collation = collationBox->currentText();

for(size_t index=0; index < m_table.fields.size(); ++index)

{

if(m_table.fields.at(index).name() == column.toStdString())

{

m_table.fields.at(index).setType(type.toStdString());

m_table.fields.at(index).setCollation(collation.toStdString());

break;

}

}

checkInput();

}

{

if(event->type() == QEvent::FocusOut)

{

updateTypeAndCollation(object);

}

return false;

{

size_t index = static_cast<size_t>(ui->treeWidget->indexOfTopLevelItem(item));

if(index < m_table.fields.size())

{

sqlb::Field& field = m_table.fields.at(index);

QString oldFieldName = QString::fromStdString(field.name());

switch(column)

{

case kName:

{

// When a field of that name already exists, show a warning to the user and don't apply the new name. This is done by searching for an

// existing field with the new name. There is one exception, however, to this rule: if the field that we have found is the same field

// as the one we are currently trying to rename, this means the user is trying to rename the field to essentially the same name but

// with different case. Example: if I rename column 'COLUMN' to 'column', findField() is going to return the current field number

// because it's doing a case-independent search and it can't return another field number because SQLite prohibits duplicate field

// names (no matter the case). So when this happens we just allow the renaming because there's no harm to be expected from it.

auto foundField = sqlb::findField(m_table, item->text(column).toStdString());

if(foundField != m_table.fields.end() && foundField-m_table.fields.begin() != static_cast<int>(index))

{

QMessageBox::warning(this, qApp->applicationName(), tr("There already is a field with that name. Please rename it first or choose a different "

"name for this field."));

// Reset the name to the old value but avoid calling this method again for that automatic change

ui->treeWidget->blockSignals(true);

item->setText(column, oldFieldName);

ui->treeWidget->blockSignals(false);

return;

}

// When editing an exiting table, check if any foreign keys would cause trouble in case this name is edited

if(!m_bNewTable)

{

const auto pk = m_table.primaryKey();

const auto pkColumns = m_table.primaryKeyColumns();

for(const auto& it : pdb.schemata[curTable.schema()].tables)

{

const sqlb::TablePtr& fkobj = it.second;

auto constraints = fkobj->foreignKeys();

for(const auto& fk : constraints)

{

if(fk.second->table() == m_table.name())

{

if(contains(fk.second->columns(), field.name()) || (pk && contains(pkColumns, field.name())))

{

QMessageBox::warning(this, qApp->applicationName(), tr("This column is referenced in a foreign key in table %1 and thus "

"its name cannot be changed.")

.arg(QString::fromStdString(fkobj->name())));

// Reset the name to the old value but avoid calling this method again for that automatic change

ui->treeWidget->blockSignals(true);

item->setText(column, oldFieldName);

ui->treeWidget->blockSignals(false);

return;

}

}

}

}

}

field.setName(item->text(column).toStdString());

m_table.renameKeyInAllConstraints(oldFieldName.toStdString(), item->text(column).toStdString());

qobject_cast<QComboBox*>(ui->treeWidget->itemWidget(item, kType))->setProperty("column", item->text(column));

qobject_cast<QComboBox*>(ui->treeWidget->itemWidget(item, kCollation))->setProperty("column", item->text(column));

// Update the field name in the map of old column names to new column names

if(!m_bNewTable)

{

for(const auto& it : trackColumns)

{

if(trackColumns[it.first] == oldFieldName)

trackColumns[it.first] = QString::fromStdString(field.name());

}

}

// Update the constraints view

populateIndexConstraints();

populateForeignKeys();

} break;

case kType:

case kCollation:

// see updateTypeAndCollation() SLOT

break;

case kPrimaryKey:

{

// Check if there already is a primary key

auto pk = m_table.primaryKey();

if(pk)

{

// There already is a primary key for this table. So edit that one as there always can only be one primary key anyway.

if(item->checkState(column) == Qt::Checked)

m_table.addKeyToConstraint(pk, field.name());

else

m_table.removeKeyFromConstraint(pk, field.name());

} else if(item->checkState(column) == Qt::Checked) {

// There is no primary key in the table yet. This means we need to add a default one.

m_table.addConstraint({sqlb::IndexedColumn(field.name(), false)}, std::make_shared<sqlb::PrimaryKeyConstraint>());

}

if(item->checkState(column) == Qt::Checked)

{

// this will unset any other autoincrement

for(int i = 0; i < ui->treeWidget->topLevelItemCount(); ++i)

{

QTreeWidgetItem* tbitem = ui->treeWidget->topLevelItem(i);

if(tbitem != item)

tbitem->setCheckState(kAutoIncrement, Qt::Unchecked);

}

} else {

item->setCheckState(kAutoIncrement, Qt::Unchecked);

}

// Update the constraints view

populateIndexConstraints();

}

break;

case kNotNull:

{

// When editing an existing table and trying to set a column to Not Null an extra check is needed

if(!m_bNewTable && item->checkState(column) == Qt::Checked)

{

// Because our renameColumn() function fails when setting a column to Not Null when it already contains some NULL values

// we need to check for this case and cancel here. Maybe we can think of some way to modify the INSERT INTO ... SELECT statement

// to at least replace all troublesome NULL values by the default value

SqliteTableModel m(pdb, this);

m.setQuery(QString("SELECT COUNT(%1) FROM %2 WHERE coalesce(NULL,%3) IS NULL;").arg(

QString::fromStdString(sqlb::joinStringVector(sqlb::escapeIdentifier(pdb.getTableByName(curTable)->rowidColumns()), ",")),

QString::fromStdString(curTable.toString()),

QString::fromStdString(sqlb::escapeIdentifier(field.name()))));

if(!m.completeCache())

{

// If we couldn't load all data because the cancel button was clicked, just unset the checkbox again and stop.

item->setCheckState(column, Qt::Unchecked);

return;

}

if(m.data(m.index(0, 0)).toInt() > 0)

{

// There is a NULL value, so print an error message, uncheck the combobox, and return here

QMessageBox::information(this, qApp->applicationName(), tr("There is at least one row with this field set to NULL. "

"This makes it impossible to set this flag. Please change the table data first."));

item->setCheckState(column, Qt::Unchecked);

return;

}

}

field.setNotNull(item->checkState(column) == Qt::Checked);

}

break;

case kAutoIncrement:

{

bool ischecked = item->checkState(column) == Qt::Checked;

if(ischecked)

{

// First check if the contents of this column are all integers. If not this field cannot be set to AI

if(!m_bNewTable)

{

SqliteTableModel m(pdb, this);

m.setQuery(QString("SELECT COUNT(*) FROM %1 WHERE %2 <> CAST(%3 AS INTEGER);").arg(

QString::fromStdString(curTable.toString()),

QString::fromStdString(sqlb::escapeIdentifier(field.name())),

QString::fromStdString(sqlb::escapeIdentifier(field.name()))));

if(!m.completeCache())

{

// If we couldn't load all data because the cancel button was clicked, just unset the checkbox again and stop.

item->setCheckState(column, Qt::Unchecked);

return;

}

if(m.data(m.index(0, 0)).toInt() > 0)

{

// There is a non-integer value, so print an error message, uncheck the combobox, and return here

QMessageBox::information(this, qApp->applicationName(), tr("There is at least one row with a non-integer value in this field. "

"This makes it impossible to set the AI flag. Please change the table data first."));

item->setCheckState(column, Qt::Unchecked);

return;

}

}

// Make sure the data type is set to integer

QComboBox* comboType = qobject_cast<QComboBox*>(ui->treeWidget->itemWidget(item, kType));

comboType->setCurrentIndex(comboType->findText("INTEGER"));

item->setCheckState(kPrimaryKey, Qt::Checked);

// this will unset all other primary keys

// there can't be more than one autoincrement pk

for(int i = 0; i < ui->treeWidget->topLevelItemCount(); ++i)

{

QTreeWidgetItem* tbitem = ui->treeWidget->topLevelItem(i);

if(tbitem != item)

{

tbitem->setCheckState(kAutoIncrement, Qt::Unchecked);

tbitem->setCheckState(kPrimaryKey, Qt::Unchecked);

}

}

}

if(m_table.primaryKey())

m_table.primaryKey()->setAutoIncrement(ischecked);

}

break;

case kUnique:

{

// When editing an existing table and trying to set a column to unique an extra check is needed

if(!m_bNewTable && item->checkState(column) == Qt::Checked)

{

// Because our renameColumn() function fails when setting a column to unique when it already contains the same values

SqliteTableModel m(pdb, this);

m.setQuery(QString("SELECT COUNT(%2) FROM %1;").arg(

QString::fromStdString(curTable.toString()),

QString::fromStdString(sqlb::escapeIdentifier(field.name()))));

if(!m.completeCache())

{

// If we couldn't load all data because the cancel button was clicked, just unset the checkbox again and stop.

item->setCheckState(column, Qt::Unchecked);

return;

}

int rowcount = m.data(m.index(0, 0)).toInt();

m.setQuery(QString("SELECT COUNT(DISTINCT %2) FROM %1;").arg(

QString::fromStdString(curTable.toString()),

QString::fromStdString(sqlb::escapeIdentifier(field.name()))));

if(!m.completeCache())

{

// If we couldn't load all data because the cancel button was clicked, just unset the checkbox again and stop.

item->setCheckState(column, Qt::Unchecked);

return;

}

int uniquecount = m.data(m.index(0, 0)).toInt();

if(rowcount != uniquecount)

{

// There is a NULL value, so print an error message, uncheck the combobox, and return here

QMessageBox::information(this, qApp->applicationName(), tr("Column '%1' has duplicate data.\n").arg(QString::fromStdString(field.name()))

+ tr("This makes it impossible to enable the 'Unique' flag. Please remove the duplicate data, which will allow the 'Unique' flag to then be enabled."));

item->setCheckState(column, Qt::Unchecked);

return;

}

}

field.setUnique(item->checkState(column) == Qt::Checked);

}

break;

case kDefault:

{

QString new_value = item->text(column);

// If the default value isn't a SQL keyword perform an extra check: If it isn't numeric but doesn't start and end with quotes,

// add the quotes

if(new_value.size() && new_value.compare("null", Qt::CaseInsensitive) &&

new_value.compare("current_time", Qt::CaseInsensitive) &&

new_value.compare("current_date", Qt::CaseInsensitive) &&

new_value.compare("current_timestamp", Qt::CaseInsensitive))

{

QChar first_char = new_value.trimmed().at(0);

if(!((first_char == '\'' || first_char == '"') && new_value.trimmed().endsWith(first_char)))

{

bool is_numeric;

new_value.toDouble(&is_numeric);

if(!is_numeric)

{

if(new_value.trimmed().startsWith("=(") && new_value.trimmed().endsWith(')'))

{

new_value = new_value.trimmed().mid(1); // Leave the brackets as they are needed for a valid SQL expression

} else {

// Finally, the same check as in populateFields(),

// add "=" to GUI field, if a function surrounded by parentheses,

// or add quotes to both GUI field and stored SQL expression, otherwise.

if(new_value.front() == '(' && new_value.back() == ')') {

item->setText(column, '=' + new_value);

} else {

new_value = sqlb::escapeString(new_value);

item->setText(column, new_value);

}

}

}

}

}

field.setDefaultValue(new_value.toStdString());

}

break;

case kCheck:

field.setCheck(item->text(column).toStdString());

break;

case kForeignKey:

// handled in delegate

break;

}

}

checkInput();

{

// Find modified constraint

auto constraint = ui->tableIndexConstraints->item(item->row(), kConstraintType)->data(Qt::UserRole).value<std::shared_ptr<sqlb::UniqueConstraint>>();

// Which column has been modified?

switch(item->column())

{

case kConstraintName:

constraint->setName(item->text().toStdString());

break;

}

// Update SQL

populateIndexConstraints();

checkInput();

{

// Find modified foreign key

auto fk = ui->tableForeignKeys->item(item->row(), kForeignKeyReferences)->data(Qt::UserRole).value<std::shared_ptr<sqlb::ForeignKeyClause>>();

// Which column has been modified?

switch(item->column())

{

case kForeignKeyName:

fk->setName(item->text().toStdString());

break;

}

// Update SQL

populateFields();

populateForeignKeys();

checkInput();

{

// Find modified check constraint

auto c = ui->tableCheckConstraints->item(item->row(), kCheckConstraintCheck)->data(Qt::UserRole).value<std::shared_ptr<sqlb::CheckConstraint>>();

// Which column has been modified?

switch(item->column())

{

case kCheckConstraintCheck:

c->setExpression(item->text().toStdString());

break;

case kCheckConstraintName:

c->setName(item->text().toStdString());

break;

}

// Update SQL

populateFields();

populateCheckConstraints();

checkInput();

{

// Check whether the double clicked item is in the columns column

if(item->column() == kConstraintColumns)

{

sqlb::IndexedColumnVector indexed_columns = ui->tableIndexConstraints->item(item->row(), item->column())->data(Qt::UserRole).value<sqlb::IndexedColumnVector>();

sqlb::StringVector columns;

std::transform(indexed_columns.begin(), indexed_columns.end(), std::back_inserter(columns), [](const auto& e) { return e.name(); });

// Show the select items popup dialog

SelectItemsPopup* dialog = new SelectItemsPopup(m_table.fieldNames(), columns, this);

QRect item_rect = ui->tableIndexConstraints->visualItemRect(item);

dialog->move(ui->tableIndexConstraints->mapToGlobal(QPoint(ui->tableIndexConstraints->x() + item_rect.x(),

ui->tableIndexConstraints->y() + item_rect.y() + item_rect.height() / 2)));

dialog->show();

// Get constraint

auto constraint = ui->tableIndexConstraints->item(item->row(), kConstraintType)->data(Qt::UserRole).value<std::shared_ptr<sqlb::UniqueConstraint>>();

// When clicking the Apply button in the popup dialog, save the new columns list

connect(dialog, &SelectItemsPopup::accepted, this, [this, dialog, constraint, columns]() {

// Check if column selection changed at all

sqlb::StringVector new_columns = dialog->selectedItems();

if(columns != new_columns)

{

// Remove the constraint with the old columns and add a new one with the new columns

m_table.removeConstraint(constraint);

if(constraint->isPrimaryKey())

m_table.addConstraint(new_columns, std::dynamic_pointer_cast<sqlb::PrimaryKeyConstraint>(constraint));

else

m_table.addConstraint(new_columns, std::dynamic_pointer_cast<sqlb::UniqueConstraint>(constraint));

// Update the UI

populateFields();

populateIndexConstraints();

updateSqlText();

}

});

}

{

// Check whether the double clicked item is in the columns column

if(item->column() == kForeignKeyColumns)

{

auto columns = ui->tableForeignKeys->item(item->row(), item->column())->data(Qt::UserRole).value<sqlb::StringVector>();

auto fk = item->tableWidget()->item(item->row(), kForeignKeyReferences)->data(Qt::UserRole).value<std::shared_ptr<sqlb::ForeignKeyClause>>();

// Show the select items popup dialog

SelectItemsPopup* dialog = new SelectItemsPopup(m_table.fieldNames(), columns, this);

QRect item_rect = ui->tableForeignKeys->visualItemRect(item);

dialog->move(item->tableWidget()->mapToGlobal(QPoint(ui->tableForeignKeys->x() + item_rect.x(),

ui->tableForeignKeys->y() + item_rect.y() + item_rect.height() / 2)));

dialog->show();

// When clicking the Apply button in the popup dialog, save the new columns list

connect(dialog, &SelectItemsPopup::accepted, this, [this, dialog, fk, columns]() {

// Check if column selection changed at all

sqlb::StringVector new_columns = dialog->selectedItems();

if(columns != new_columns)

{

// Remove the constraint with the old columns and add a new one with the new columns

m_table.removeConstraint(fk);

m_table.addConstraint(new_columns, fk);

// Update the UI

populateFields();

populateForeignKeys();

updateSqlText();

}

});

}

{

QTreeWidgetItem *tbitem = new QTreeWidgetItem(ui->treeWidget);

tbitem->setFlags(tbitem->flags() | Qt::ItemIsEditable);

// Find an unused name for the field by starting with 'Fieldx' where x is the number of fields + 1.

// If this name happens to exist already, increase x by one until we find an unused name.

{

int field_number = ui->treeWidget->topLevelItemCount();

std::string field_name;

do

{

field_name = "Field" + std::to_string(field_number);

field_number++;

} while(sqlb::findField(m_table, field_name) != m_table.fields.end());

tbitem->setText(kName, QString::fromStdString(field_name));

}

QComboBox* typeBox = new QComboBox(ui->treeWidget);

typeBox->setProperty("column", tbitem->text(kName));

typeBox->setEditable(!m_table.isStrict()); // Strict tables do not allow arbitrary types

typeBox->addItems(m_table.isStrict() ? DBBrowserDB::DatatypesStrict : DBBrowserDB::Datatypes);

int defaultFieldTypeIndex = Settings::getValue("db", "defaultfieldtype").toInt();

if (defaultFieldTypeIndex < DBBrowserDB::Datatypes.count())

{

typeBox->setCurrentIndex(defaultFieldTypeIndex);

}

ui->treeWidget->setItemWidget(tbitem, kType, typeBox);

typeBox->installEventFilter(this);

connect(typeBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateTypeAndCollation()));

QComboBox* collationBox = new QComboBox(ui->treeWidget);

collationBox->setProperty("column", tbitem->text(kName));

collationBox->addItems(m_collationList);

collationBox->setCurrentIndex(collationBox->findText(""));

ui->treeWidget->setItemWidget(tbitem, kCollation, collationBox);

collationBox->installEventFilter(this);

connect(collationBox, SIGNAL(currentIndexChanged(int)), this, SLOT(updateTypeAndCollation()));