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edittable: add ability to set the unique constraint on a table

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This commit is contained in:
Peinthor Rene
2014-08-07 23:15:38 +02:00
parent f291f89a93
commit ff50a94eef
3 changed files with 42 additions and 2 deletions
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31
src/EditTableDialog.cpp
View File

@@ -57,6 +57,7 @@ void EditTableDialog::updateColumnWidth()
ui->treeWidget->setColumnWidth(kNotNull, 30);
ui->treeWidget->setColumnWidth(kPrimaryKey, 30);
ui->treeWidget->setColumnWidth(kAutoIncrement, 30);
ui->treeWidget->setColumnWidth(kUnique, 30);
}
void EditTableDialog::populateFields()
@@ -91,6 +92,7 @@ void EditTableDialog::populateFields()
tbitem->setCheckState(kNotNull, f->notnull() ? Qt::Checked : Qt::Unchecked);
tbitem->setCheckState(kPrimaryKey, f->primaryKey() ? Qt::Checked : Qt::Unchecked);
tbitem->setCheckState(kAutoIncrement, f->autoIncrement() ? Qt::Checked : Qt::Unchecked);
tbitem->setCheckState(kUnique, f->unique() ? Qt::Checked : Qt::Unchecked);
tbitem->setText(kDefault, f->defaultValue());
tbitem->setText(kCheck, f->check());
ui->treeWidget->addTopLevelItem(tbitem);
@@ -287,6 +289,34 @@ void EditTableDialog::itemChanged(QTreeWidgetItem *item, int column)
callRenameColumn = true;
}
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 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(this, pdb);
m.setQuery(QString("SELECT COUNT(`%2`) FROM `%1`;").arg(curTable).arg(field->name()));
int rowcount = m.data(m.index(0, 0)).toInt();
m.setQuery(QString("SELECT COUNT(distinct `%2`) FROM `%1`;").arg(curTable).arg(field->name()));
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 no unique data.\n").arg(field->name())
+ tr("This makes it impossible to set this flag. Please change the table data first."));
item->setCheckState(column, Qt::Unchecked);
return;
}
}
field->setUnique(item->checkState(column) == Qt::Checked);
if(!m_bNewTable)
callRenameColumn = true;
}
break;
case kDefault:
field->setDefaultValue(item->text(column));
if(!m_bNewTable)
@@ -321,6 +351,7 @@ void EditTableDialog::addField()
tbitem->setCheckState(kNotNull, Qt::Unchecked);
tbitem->setCheckState(kPrimaryKey, Qt::Unchecked);
tbitem->setCheckState(kAutoIncrement, Qt::Unchecked);
tbitem->setCheckState(kUnique, Qt::Unchecked);
ui->treeWidget->addTopLevelItem(tbitem);
// add field to table object

5
src/EditTableDialog.h
View File

@@ -28,8 +28,9 @@ private:
kNotNull = 2,
kPrimaryKey = 3,
kAutoIncrement = 4,
kDefault = 5,
kCheck = 6
kUnique = 5,
kDefault = 6,
kCheck = 7
};
void updateColumnWidth();

8
src/EditTableDialog.ui
View File

@@ -213,6 +213,14 @@
<string>Autoincrement</string>
</property>
</column>
<column>
<property name="text">
<string>U</string>
</property>
<property name="toolTip">
<string>Unique</string>
</property>
</column>
<column>
<property name="text">
<string>Default</string>