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Redo [BUGFIX][QGIS Server] Joins was not reloaded if the layer is in …

…cache

With the commit f6aad8b, the QgsMapLayerRegistry signal `layersWillBeRemoved` is always emit. This imply that the vector layer join buffer is empty and not reloaded if the layer is in cache.

To fix it, the QgsServerProjectParser has to have the same method as QgsVectorLayerJoinBuffer::readXml.

This commit fixed #15522 Qgis Server doesnt' respect the styling from Desktop
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rldhont committed Oct 10, 2016
1 parent 89dd263 commit d5328f6b77696b11e87958d9c80a9881aa1df73a
Showing with 53 additions and 2 deletions.
  1. +50 −2 src/server/qgsserverprojectparser.cpp
  2. +3 −0 src/server/qgsserverprojectparser.h
@@ -234,7 +234,11 @@ QgsMapLayer* QgsServerProjectParser::createLayerFromElement( const QDomElement&
if ( !QgsMapLayerRegistry::instance()->mapLayer( id ) )
QgsMapLayerRegistry::instance()->addMapLayer( layer, false, false );
if ( layer->type() == QgsMapLayer::VectorLayer )
addValueRelationLayersForLayer( dynamic_cast<QgsVectorLayer *>( layer ) );
{
QgsVectorLayer* vlayer = qobject_cast<QgsVectorLayer *>( layer );
addValueRelationLayersForLayer( vlayer );
addJoinsToLayer( const_cast<QDomElement&>( elem ), vlayer );
}

return layer;
}
@@ -1535,13 +1539,57 @@ void QgsServerProjectParser::addJoinLayersForElement( const QDomElement& layerEl
{
QString id = joinNodeList.at( i ).toElement().attribute( "joinLayerId" );
QgsMapLayer* layer = mapLayerFromLayerId( id );
if ( layer )
if ( layer && !QgsMapLayerRegistry::instance()->mapLayer( id ) )
{
QgsMapLayerRegistry::instance()->addMapLayer( layer, false, false );
}
}
}

// Based on QgsVectorLayerJoinBuffer::readXml
void QgsServerProjectParser::addJoinsToLayer( const QDomElement& layerElem, QgsVectorLayer *vl ) const
{
if ( !vl )
return;

QDomElement vectorJoinsElem = layerElem.firstChildElement( "vectorjoins" );
if ( vectorJoinsElem.isNull() )
{
return;
}

QDomNodeList joinList = vectorJoinsElem.elementsByTagName( "join" );
for ( int i = 0; i < joinList.size(); ++i )
{
QDomElement infoElem = joinList.at( i ).toElement();
QgsVectorJoinInfo info;
info.joinFieldName = infoElem.attribute( "joinFieldName" );
info.joinLayerId = infoElem.attribute( "joinLayerId" );
info.targetFieldName = infoElem.attribute( "targetFieldName" );
info.memoryCache = infoElem.attribute( "memoryCache" ).toInt();

info.joinFieldIndex = infoElem.attribute( "joinField" ).toInt(); //for compatibility with 1.x
info.targetFieldIndex = infoElem.attribute( "targetField" ).toInt(); //for compatibility with 1.x

QDomElement subsetElem = infoElem.firstChildElement( "joinFieldsSubset" );
if ( !subsetElem.isNull() )
{
QStringList* fieldNames = new QStringList;
QDomNodeList fieldNodes = infoElem.elementsByTagName( "field" );
for ( int i = 0; i < fieldNodes.count(); ++i )
*fieldNames << fieldNodes.at( i ).toElement().attribute( "name" );
info.setJoinFieldNamesSubset( fieldNames );
}

if ( infoElem.attribute( "hasCustomPrefix" ).toInt() )
info.prefix = infoElem.attribute( "customPrefix" );
else
info.prefix = QString::null;

vl->addJoin( info );
}
}

void QgsServerProjectParser::addValueRelationLayersForLayer( const QgsVectorLayer *vl ) const
{
if ( !vl )
@@ -111,7 +111,10 @@ class SERVER_EXPORT QgsServerProjectParser
QStringList wfsLayers() const;
QStringList wcsLayers() const;

/** Add layers for vector joins */
void addJoinLayersForElement( const QDomElement& layerElem ) const;
/** Update vector joins to layer, based on QgsVectorLayerJoinBuffer::readXml */
void addJoinsToLayer( const QDomElement& layerElem, QgsVectorLayer *vl ) const;

void addValueRelationLayersForLayer( const QgsVectorLayer *vl ) const;
/** Add layers which are necessary for the evaluation of the expression function 'getFeature( layer, attributField, value)'*/

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