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## com.trolltech.qt.sql
Class QSqlTableModel

    java.lang.Object
      com.trolltech.qt.internal.QSignalEmitterInternal
          com.trolltech.qt.QSignalEmitter
              com.trolltech.qt.QtJambiObject
                  com.trolltech.qt.core.QObject
                      com.trolltech.qt.core.QAbstractItemModel
                          com.trolltech.qt.gui.QAbstractTableModel
                              com.trolltech.qt.sql.QSqlQueryModel
                                  com.trolltech.qt.sql.QSqlTableModel

All Implemented Interfaces:
  QtJambiInterface

Direct Known Subclasses:
  QSqlRelationalTableModel

    public class QSqlTableModel

extends QSqlQueryModel

The `QSqlTableModel` class provides an editable data model for a single database table. `QSqlTableModel` is a high-level interface for reading and writing database records from a single table. It is build on top of the lower-level `QSqlQuery` and can be used to provide data to view classes such as `QTableView`. For example:

            QSqlTableModel model = new QSqlTableModel();
            model.setTable("employee");
            model.setEditStrategy(QSqlTableModel.EditStrategy.OnManualSubmit);
            model.select();
            model.removeColumn(0); // don't show the ID
            model.setHeaderData(0, Qt.Orientation.Horizontal, tr("Name"));
            model.setHeaderData(1, Qt.Orientation.Horizontal, tr("Salary"));

            QTableView view = new QTableView();
            view.setModel(model);
            view.show();

We set the SQL table's name and the edit strategy, then we set up the labels displayed in the view header. The edit strategy dictates when the changes done by the user in the view are actually applied to the database. The possible values are `OnFieldChange` , `OnRowChange` , and `OnManualSubmit` .

`QSqlTableModel` can also be used to access a database programmatically, without binding it to a view:

            QSqlTableModel model = new QSqlTableModel();
            model.setTable("employee");
            String name = model.record(4).value("name").toString();

The code snippet above extracts the `salary` field from record 4 in the result set of the query `SELECT * from employee`.

It is possible to set filters using `setFilter()`, or modify the sort order using `setSort()`. At the end, you must call `select()` to populate the model with data.

The sql/tablemodel example illustrates how to use `QSqlTableModel` as the data source for a `QTableView`.

`QSqlTableModel` provides no direct support for foreign keys. Use the `QSqlRelationalTableModel` and QSqlRelationalDelegate if you want to resolve foreign keys.

See also:
  `QSqlRelationalTableModel`, `QSqlQuery`, Model/View Programming, Table Model Example, and Cached Table Example.

Nested Class Summary
`static class` | `QSqlTableModel.EditStrategy` This enum type describes which strategy to choose when editing values in the database.

Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter
`QSignalEmitter.AbstractSignal, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9`

Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal`

Field Summary
`QSignalEmitter.Signal1` | `beforeDelete` This signal takes 1 generic argument(s).
`QSignalEmitter.Signal1` | `beforeInsert` This signal takes 1 generic argument(s).
`QSignalEmitter.Signal2` | `beforeUpdate` This signal takes 2 generic argument(s).
`QSignalEmitter.Signal2` | `primeInsert` This signal takes 2 generic argument(s).

Fields inherited from class com.trolltech.qt.core.QAbstractItemModel
`dataChanged, headerDataChanged, layoutAboutToBeChanged, layoutChanged`

Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`currentSender`

Constructor Summary
`QSqlTableModel()` Creates an empty `QSqlTableModel` and sets the parent to `parent` and the database connection to `db`.
`QSqlTableModel(QObject parent)` Creates an empty `QSqlTableModel` and sets the parent to `parent` and the database connection to `db`.
`QSqlTableModel(QObject parent, QSqlDatabase db)` Creates an empty `QSqlTableModel` and sets the parent to `parent` and the database connection to `db`.

Method Summary
`QSqlDatabase` | `database()` Returns a pointer to the used `QSqlDatabase` or 0 if no database was set.
`protected boolean` | `deleteRowFromTable(int row)` Deletes the given `row` from the currently active database table.
`QSqlTableModel.EditStrategy` | `editStrategy()` Returns the current edit strategy.
`int` | `fieldIndex(java.lang.String fieldName)` Returns the index of the field `fieldName`.
`java.lang.String` | `filter()` Returns the currently set filter.
`boolean` | `insertRecord(int row, QSqlRecord record)` Inserts the `record` after `row`.
`protected boolean` | `insertRowIntoTable(QSqlRecord values)` Inserts the values `values` into the currently active database table.
`boolean` | `isDirty(com.trolltech.qt.core.QModelIndex index)` Returns true if the value at the index `index` is dirty, otherwise false.
`protected java.lang.String` | `orderByClause()` Returns an SQL `ORDER BY` clause based on the currently set sort order.
`QSqlIndex` | `primaryKey()` Returns the primary key for the current table, or an empty `QSqlIndex` if the table is not set or has no primary key.
`void` | `revertAll()` Reverts all pending changes.
`void` | `revertRow(int row)` Reverts all changes for the specified `row`.
`boolean` | `select()` Populates the model with data from the table that was set via `setTable()`, using the specified filter and sort condition, and returns true if successful; otherwise returns false.
`protected java.lang.String` | `selectStatement()` Returns the SQL `SELECT` statement used internally to populate the model.
`void` | `setEditStrategy(QSqlTableModel.EditStrategy strategy)` Sets the strategy for editing values in the database to `strategy`.
`void` | `setFilter(java.lang.String filter)` Sets the current filter to `filter`.
`protected void` | `setPrimaryKey(QSqlIndex key)` Protected method that allows subclasses to set the primary key to `key`.
`boolean` | `setRecord(int row, QSqlRecord record)` Sets the values at the specified `row` to the values of `record`.
`void` | `setSort(int column, Qt.SortOrder order)` Sets the sort order for `column` to `order`.
`void` | `setTable(java.lang.String tableName)` Sets the database table on which the model operates to `tableName`.
`boolean` | `submitAll()` Submits all pending changes and returns true on success.
`java.lang.String` | `tableName()` Returns the name of the currently selected table.
`protected boolean` | `updateRowInTable(int row, QSqlRecord values)` Updates the given `row` in the currently active database table with the specified `values`.

Methods inherited from class com.trolltech.qt.sql.QSqlQueryModel
`clear, indexInQuery, lastError, query, queryChange, record, record, setLastError, setQuery, setQuery, setQuery`

Methods inherited from class com.trolltech.qt.core.QAbstractItemModel
`beginInsertColumns, beginInsertRows, beginRemoveColumns, beginRemoveRows, buddy, canFetchMore, changePersistentIndex, changePersistentIndexList, columnCount, columnCount, createIndex, createIndex, createIndex, data, data, data, data, dropMimeData, endInsertColumns, endInsertRows, endRemoveColumns, endRemoveRows, fetchMore, flags, hasChildren, hasChildren, hasIndex, hasIndex, headerData, headerData, index, index, insertColumn, insertColumn, insertColumns, insertColumns, insertRow, insertRow, insertRows, insertRows, itemData, match, match, match, match, mimeData, mimeTypes, parent, persistentIndexList, removeColumn, removeColumn, removeColumns, removeColumns, removeRow, removeRow, removeRows, removeRows, reset, revert, rowCount, rowCount, setData, setData, setData, setData, setHeaderData, setHeaderData, setItemData, setSupportedDragActions, setSupportedDragActions, sibling, sort, sort, span, submit, supportedDragActions, supportedDropActions`

Methods inherited from class com.trolltech.qt.core.QObject
`childEvent, children, connectSlotsByName, customEvent, disposeLater, dumpObjectInfo, dumpObjectTree, dynamicPropertyNames, event, eventFilter, findChild, findChild, findChild, findChildren, findChildren, findChildren, findChildren, indexOfProperty, installEventFilter, isWidgetType, killTimer, moveToThread, objectName, parent, properties, property, removeEventFilter, setObjectName, setParent, setProperty, startTimer, timerEvent, toString, userProperty`

Methods inherited from class com.trolltech.qt.QtJambiObject
`dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr`

Methods inherited from class com.trolltech.qt.QSignalEmitter
`blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread`

Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`__qt_signalInitialization`

Methods inherited from class java.lang.Object
`clone, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface com.trolltech.qt.QtJambiInterface
`disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership`

Field Detail

### beforeDelete

    public final QSignalEmitter.Signal1 beforeDelete

  This signal takes 1 generic argument(s). We list their type and the name they go by in the description of this signal. <java.lang.Integer(named: row)>:

  This signal is emitted before the `row` is deleted.

### beforeInsert

    public final QSignalEmitter.Signal1 beforeInsert

  This signal takes 1 generic argument(s). We list their type and the name they go by in the description of this signal. <com.trolltech.qt.sql.QSqlRecord(named: record)>:

  This signal is emitted before a new row is inserted. The values that are about to be inserted are stored in `record` and can be modified before they will be inserted.

### beforeUpdate

    public final QSignalEmitter.Signal2 beforeUpdate

  This signal takes 2 generic argument(s). We list their type and the name they go by in the description of this signal. <java.lang.Integer(named: row), com.trolltech.qt.sql.QSqlRecord(named: record)>:

  This signal is emitted before the `row` is updated with the values from `record`.

  Note that only values that are marked as generated will be updated. The generated flag can be set with `QSqlRecord::setGenerated()` and checked with `QSqlRecord::isGenerated()`.

See also:
  `QSqlRecord::isGenerated()`.

### primeInsert

    public final QSignalEmitter.Signal2 primeInsert

  This signal takes 2 generic argument(s). We list their type and the name they go by in the description of this signal. <java.lang.Integer(named: row), com.trolltech.qt.sql.QSqlRecord(named: record)>:

  This signal is emitted when an insertion is initiated in the given `row`. The `record` parameter can be written to (since it is a reference), for example to populate some fields with default values.

Constructor Detail

### QSqlTableModel

    public QSqlTableModel(QObject parent)

  Creates an empty `QSqlTableModel` and sets the parent to `parent` and the database connection to `db`. If `db` is not valid, the default database connection will be used.

  The default edit strategy is `OnRowChange` .

### QSqlTableModel

    public QSqlTableModel()

  Creates an empty `QSqlTableModel` and sets the parent to `parent` and the database connection to `db`. If `db` is not valid, the default database connection will be used.

  The default edit strategy is `OnRowChange` .

### QSqlTableModel

    public QSqlTableModel(QObject parent,
                          QSqlDatabase db)

  Creates an empty `QSqlTableModel` and sets the parent to `parent` and the database connection to `db`. If `db` is not valid, the default database connection will be used.

  The default edit strategy is `OnRowChange` .

Method Detail

### database

    public final QSqlDatabase database()

  Returns a pointer to the used `QSqlDatabase` or 0 if no database was set.

### editStrategy

    public final QSqlTableModel.EditStrategy editStrategy()

  Returns the current edit strategy.

See also:
  `setEditStrategy()`.

### fieldIndex

    public final int fieldIndex(java.lang.String fieldName)

  Returns the index of the field `fieldName`.

### filter

    public final java.lang.String filter()

  Returns the currently set filter.

See also:
  `setFilter()`, and `select()`.

### insertRecord

    public final boolean insertRecord(int row,
                                      QSqlRecord record)

  Inserts the `record` after `row`. If `row` is negative, the record will be appended to the end. Calls `insertRows()` and `setRecord()` internally.

  Returns true if the row could be inserted, otherwise false.

See also:
  `insertRows()`, and `removeRows()`.

### isDirty

    public final boolean isDirty(com.trolltech.qt.core.QModelIndex index)

  Returns true if the value at the index `index` is dirty, otherwise false. Dirty values are values that were modified in the model but not yet written into the database.

  If `index` is invalid or points to a non-existing row, false is returned.

### primaryKey

    public final QSqlIndex primaryKey()

  Returns the primary key for the current table, or an empty `QSqlIndex` if the table is not set or has no primary key.

See also:
  `setTable()`, `setPrimaryKey()`, and `QSqlDatabase::primaryIndex()`.

### revertAll

    public final void revertAll()

  Reverts all pending changes.

See also:
  `revert()`, `revertRow()`, and `submitAll()`.

### setPrimaryKey

    protected final void setPrimaryKey(QSqlIndex key)

  Protected method that allows subclasses to set the primary key to `key`.

  Normally, the primary index is set automatically whenever you call `setTable()`.

See also:
  `primaryKey()`, and `QSqlDatabase::primaryIndex()`.

### setRecord

    public final boolean setRecord(int row,
                                   QSqlRecord record)

  Sets the values at the specified `row` to the values of `record`. Returns true if all the values could be set; otherwise returns false.

See also:
  `record()`.

### submitAll

    public final boolean submitAll()

  Submits all pending changes and returns true on success. Returns false on error, detailed error information can be obtained with `lastError()`.

  On success the model will be repopulated. Any views presenting it will lose their selections.

  Note: In `OnManualSubmit` mode, already submitted changes won't be cleared from the cache when `submitAll()` fails. This allows transactions to be rolled back and resubmitted again without losing data.

See also:
  `revertAll()`, and `lastError()`.

### tableName

    public final java.lang.String tableName()

  Returns the name of the currently selected table.

### deleteRowFromTable

    protected boolean deleteRowFromTable(int row)

  Deletes the given `row` from the currently active database table.

  This is a low-level method that operates directly on the database and should not be called directly. Use `removeRow()` or `removeRows()` to delete values. The model will decide depending on its edit strategy when to modify the database.

  Returns true if the row was deleted; otherwise returns false.

See also:
  `removeRow()`, and `removeRows()`.

### insertRowIntoTable

    protected boolean insertRowIntoTable(QSqlRecord values)

  Inserts the values `values` into the currently active database table.

  This is a low-level method that operates directly on the database and should not be called directly. Use `insertRow()` and `setData()` to insert values. The model will decide depending on its edit strategy when to modify the database.

  Returns true if the values could be inserted, otherwise false. Error information can be retrieved with `lastError()`.

See also:
  `lastError()`, `insertRow()`, and `insertRows()`.

### orderByClause

    protected java.lang.String orderByClause()

  Returns an SQL `ORDER BY` clause based on the currently set sort order.

See also:
  `setSort()`, and `selectStatement()`.

### revertRow

    public void revertRow(int row)

  Reverts all changes for the specified `row`.

See also:
  `revert()`, `revertAll()`, `submit()`, and `submitAll()`.

### select

    public boolean select()

  Populates the model with data from the table that was set via `setTable()`, using the specified filter and sort condition, and returns true if successful; otherwise returns false.

See also:
  `setTable()`, `setFilter()`, and `selectStatement()`.

### selectStatement

    protected java.lang.String selectStatement()

  Returns the SQL `SELECT` statement used internally to populate the model. The statement includes the filter and the `ORDER BY` clause.

See also:
  `filter()`, and `orderByClause()`.

### setEditStrategy

    public void setEditStrategy(QSqlTableModel.EditStrategy strategy)

  Sets the strategy for editing values in the database to `strategy`.

  This will revert any pending changes.

See also:
  `editStrategy()`, and `revertAll()`.

### setFilter

    public void setFilter(java.lang.String filter)

  Sets the current filter to `filter`.

  The filter is a SQL `WHERE` clause without the keyword `WHERE` (for example, `name='Josephine')`.

  If the model is already populated with data from a database, the model re-selects it with the new filter. Otherwise, the filter will be applied the next time `select()` is called.

See also:
  `filter()`, `select()`, `selectStatement()`, and `orderByClause()`.

### setSort

    public void setSort(int column,
                        Qt.SortOrder order)

  Sets the sort order for `column` to `order`. This does not affect the current data, to refresh the data using the new sort order, call `select()`.

See also:
  `sort()`, `select()`, and `orderByClause()`.

### setTable

    public void setTable(java.lang.String tableName)

  Sets the database table on which the model operates to `tableName`. Does not select data from the table, but fetches its field information.

  To populate the model with the table's data, call `select()`.

  Error information can be retrieved with `lastError()`.

See also:
  `select()`, `setFilter()`, and `lastError()`.

### updateRowInTable

    protected boolean updateRowInTable(int row,
                                       QSqlRecord values)

  Updates the given `row` in the currently active database table with the specified `values`. Returns true if successful; otherwise returns false.

  This is a low-level method that operates directly on the database and should not be called directly. Use `setData()` to update values. The model will decide depending on its edit strategy when to modify the database.

  Note that only values that have the generated-flag set are updated. The generated-flag can be set with `QSqlRecord::setGenerated()` and tested with `QSqlRecord::isGenerated()`.

See also:
  `QSqlRecord::isGenerated()`, and `setData()`.

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