28 name = lJoinLayer->name() +
'_';
70 joinFeature.
setFields( lJoinLayer->fields() );
74 for (
const auto &field : joinFields )
93 QStringList fieldNames;
100 for (
const QString &s : std::as_const( *lst ) )
103 fieldNames.append( s );
108 for (
const QgsField &f : joinLayerFields )
112 fieldNames.append( f.name() );
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Q_INVOKABLE bool setAttribute(int field, const QVariant &attr)
Sets an attribute's value by field index.
int fieldNameIndex(const QString &fieldName) const
Utility method to get attribute index from name.
void initAttributes(int fieldCount)
Initialize this feature with the given number of fields.
void setFields(const QgsFields &fields, bool initAttributes=false)
Assigns a field map with the feature to allow attribute access by attribute name.
Q_INVOKABLE QVariant attribute(const QString &name) const
Lookup attribute value by attribute name.
Encapsulate a field in an attribute table or data source.
Container of fields for a vector layer.
Defines left outer join from our vector layer to some other vector layer.
QStringList * joinFieldNamesSubset() const
Returns the subset of fields to be used from joined layer.
void setUsingMemoryCache(bool enabled)
Sets whether values from the joined layer should be cached in memory to speed up lookups.
QgsFeature extractJoinedFeature(const QgsFeature &feature) const
Extract the join feature from the target feature for the current join layer information.
bool mMemoryCache
True if the join is cached in virtual memory.
void setEditable(bool enabled)
Sets whether the form of the target layer allows editing joined fields.
void setCascadedDelete(bool enabled)
Sets whether a feature deleted on the target layer has to impact the joined layer by deleting the cor...
bool isUsingMemoryCache() const
Returns whether values from the joined layer should be cached in memory to speed up lookups.
QString prefix() const
Returns prefix of fields from the joined layer. If nullptr, joined layer's name will be used.
static QStringList joinFieldNamesSubset(const QgsVectorLayerJoinInfo &info, bool blocklisted=true)
Returns the list of field names to use for joining considering blocklisted fields and subset.
QStringList joinFieldNamesBlockList() const
Returns the list of fields to ignore.
QString joinFieldName() const
Returns name of the field of joined layer that will be used for join.
void setUpsertOnEdit(bool enabled)
Sets whether a feature created on the target layer has to impact the joined layer by creating a new f...
QString targetFieldName() const
Returns name of the field of our layer that will be used for join.
bool hasSubset(bool blocklisted=true) const
Returns true if blocklisted fields is not empty or if a subset of names has been set.
QgsVectorLayer * joinLayer() const
Returns joined layer (may be nullptr if the reference was set by layer ID and not resolved yet)
QString prefixedFieldName(const QgsField &field) const
Returns the prefixed name of the field.