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java.lang.Objectcom.trolltech.qt.internal.QSignalEmitterInternal
com.trolltech.qt.QSignalEmitter
com.trolltech.qt.QtJambiObject
com.trolltech.qt.sql.QSqlRelation
public class QSqlRelation
The QSqlRelation class stores information about an SQL foreign key. QSqlRelation is a helper class for QSqlRelationalTableModel
. See QSqlRelationalTableModel::setRelation()
and QSqlRelationalTableModel::relation()
for details.
QSqlRelationalTableModel
, QSqlRelationalDelegate
, and Relational Table Model Example.
Nested Class Summary |
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Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
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com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal |
Field Summary |
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Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
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currentSender |
Constructor Summary | |
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QSqlRelation()
Constructs an invalid QSqlRelation object. |
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QSqlRelation(java.lang.String aTableName,
java.lang.String indexCol,
java.lang.String displayCol)
Constructs a QSqlRelation object, where tableName is the SQL table name to which a foreign key refers, indexColumn is the foreign key, and displayColumn is the field that should be presented to the user. |
Method Summary | |
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QSqlRelation |
clone()
This method is reimplemented for internal reasons |
java.lang.String |
displayColumn()
Returns the column from table tableName() that should be presented to the user instead of a foreign key. |
java.lang.String |
indexColumn()
Returns the index column from table tableName() to which a foreign key refers. |
boolean |
isValid()
Returns true if the QSqlRelation object is valid; otherwise returns false. |
java.lang.String |
tableName()
Returns the name of the table to which a foreign key refers. |
Methods inherited from class com.trolltech.qt.QtJambiObject |
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dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr |
Methods inherited from class com.trolltech.qt.QSignalEmitter |
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blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread |
Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal |
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__qt_signalInitialization |
Methods inherited from class java.lang.Object |
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getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface com.trolltech.qt.QtJambiInterface |
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disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership |
Constructor Detail |
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public QSqlRelation()
For such an object, the tableName()
, indexColumn()
, and displayColumn()
functions return an empty string.
isValid()
.
public QSqlRelation(java.lang.String aTableName, java.lang.String indexCol, java.lang.String displayCol)
tableName()
, indexColumn()
, and displayColumn()
.
Method Detail |
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public final java.lang.String displayColumn()
tableName()
that should be presented to the user instead of a foreign key.
public final java.lang.String indexColumn()
tableName()
to which a foreign key refers.
public final boolean isValid()
public final java.lang.String tableName()
public QSqlRelation clone()
clone
in class java.lang.Object
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