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Relations are only valid if the id is set

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This commit is contained in:
Matthias Kuhn 2015-11-29 17:45:30 +01:00
parent 6992f2450e
commit ebc9e029f0
2 changed files with 32 additions and 0 deletions
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28
src/core/qgsrelation.cpp
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@ -111,6 +111,8 @@ void QgsRelation::writeXML( QDomNode &node, QDomDocument &doc ) const
void QgsRelation::setRelationId( const QString& id )
{
mRelationId = id;
updateRelationStatus();
}
void QgsRelation::setRelationName( const QString& name )
@ -260,6 +262,29 @@ QList<QgsRelation::FieldPair> QgsRelation::fieldPairs() const
return mFieldPairs;
}
QgsAttributeList QgsRelation::referencedFields() const
{
QgsAttributeList attrs;
Q_FOREACH ( const FieldPair& pair, mFieldPairs )
{
attrs << mReferencedLayer->fieldNameIndex( pair.second );
}
return attrs;
}
QgsAttributeList QgsRelation::referencingFields() const
{
QgsAttributeList attrs;
Q_FOREACH ( const FieldPair& pair, mFieldPairs )
{
attrs << mReferencingLayer->fieldNameIndex( pair.first );
}
return attrs;
}
bool QgsRelation::isValid() const
{
return mValid;
@ -274,6 +299,9 @@ void QgsRelation::updateRelationStatus()
mValid = true;
if ( mRelationId.isEmpty() )
mValid = false;
if ( !mReferencedLayer || !mReferencingLayer )
{
mValid = false;

4
src/core/qgsrelation.h
View File

@ -227,6 +227,10 @@ class CORE_EXPORT QgsRelation
*/
QList< FieldPair > fieldPairs() const;
QgsAttributeList referencedFields() const;
QgsAttributeList referencingFields() const;
/**
* Returns the validity of this relation. Don't use the information if it's not valid.
*