16#include <QRegularExpression>
43 std::unique_ptr<QgsExpression> expression;
53 if ( expression->hasParserError() || !expression->prepare( &context ) )
62 lst.insert( fieldOrExpression );
64 lst = expression->referencedColumns();
67 .
setFlags( ( expression && expression->needsGeometry() ) ?
70 .setSubsetOfAttributes( lst, layer->
fields() );
85 QList<QVariant> values;
89 std::unique_ptr<QgsExpression> expression;
106 QVariant v = expression->evaluate( &context );
125 QList<double> values;
130 QList<QVariant> variantValues =
getValues( layer, fieldOrExpression, ok, selectedOnly, feedback );
135 const auto constVariantValues = variantValues;
136 for (
const QVariant &value : constVariantValues )
138 double val = value.toDouble( &convertOk );
162 if ( fieldIndex < 0 || fieldIndex >= fields.
count() )
174 fieldIndex = srcFieldIndex;
175 layer = joinInfo->joinLayer();
183 QString fieldName = fields.
at( fieldIndex ).
name();
191 int limit = ignoreIds.size() + 1;
201 if ( ignoreIds.contains( feat.
id() ) )
217 if ( fieldIndex < 0 || fieldIndex >= fields.
count() )
225 QVariant newVar( maxVal.toLongLong() + 1 );
233 switch ( field.
type() )
235 case QMetaType::Type::QString:
238 if ( seed.isValid() )
239 base = seed.toString();
241 if ( !base.isEmpty() )
244 const thread_local QRegularExpression rx( QStringLiteral(
"(.*)_\\d+" ) );
245 QRegularExpressionMatch match = rx.match( base );
246 if ( match.hasMatch() )
248 base = match.captured( 1 );
260 base = f.
attribute( fieldIndex ).toString();
267 if ( !base.isEmpty() && !vals.contains( base ) )
270 for (
int i = 1; i < 10000; ++i )
272 QString testVal = base +
'_' + QString::number( i );
273 if ( !vals.contains( testVal ) )
297 if ( fieldIndex < 0 || fieldIndex >= fields.
count() )
304 QVariant maxVal = existingValues.isEmpty() ? 0 : *std::max_element( existingValues.begin(), existingValues.end(), [](
const QVariant & a,
const QVariant & b ) { return a.toLongLong() < b.toLongLong(); } );
305 QVariant newVar( maxVal.toLongLong() + 1 );
313 switch ( field.
type() )
315 case QMetaType::Type::QString:
318 if ( seed.isValid() )
319 base = seed.toString();
321 if ( !base.isEmpty() )
324 const thread_local QRegularExpression rx( QStringLiteral(
"(.*)_\\d+" ) );
325 QRegularExpressionMatch match = rx.match( base );
326 if ( match.hasMatch() )
328 base = match.captured( 1 );
335 base = existingValues.isEmpty() ? QString() : existingValues.constBegin()->toString();
340 for (
const auto &v : std::as_const( existingValues ) )
342 if ( v.toString().startsWith( base ) )
343 vals.push_back( v.toString() );
347 if ( !base.isEmpty() && !vals.contains( base ) )
350 for (
int i = 1; i < 10000; ++i )
352 QString testVal = base +
'_' + QString::number( i );
353 if ( !vals.contains( testVal ) )
376 if ( attributeIndex < 0 || attributeIndex >= layer->
fields().
count() )
391 if ( attributeIndex < 0 || attributeIndex >= layer->
fields().
count() )
396 const QVariant value = feature.
attribute( attributeIndex );
411 valid = expr.
evaluate( &context ).toBool();
419 errors << QObject::tr(
"evaluation error: %1" ).arg( expr.
evalErrorString() );
427 bool notNullConstraintViolated {
false };
447 errors << QObject::tr(
"value is NULL" );
448 notNullConstraintViolated =
true;
454 if ( ! notNullConstraintViolated )
473 valid = valid && !alreadyExists;
477 errors << QObject::tr(
"value is not unique" );
490 return features.isEmpty() ?
QgsFeature() : features.first();
499 result.reserve( featuresData.length() );
502 std::unique_ptr< QgsExpressionContext > tempContext;
507 evalContext = tempContext.get();
513 QMap<int, QSet<QVariant>> uniqueValueCache;
515 auto checkUniqueValue = [ & ](
const int fieldIdx,
const QVariant & value )
517 if ( ! uniqueValueCache.contains( fieldIdx ) )
522 std::unique_ptr<QgsVectorLayer> unfilteredClone { layer->
clone( ) };
524 uniqueValueCache[ fieldIdx ] = unfilteredClone->uniqueValues( fieldIdx );
528 uniqueValueCache[ fieldIdx ] = layer->
uniqueValues( fieldIdx );
531 return uniqueValueCache[ fieldIdx ].contains( value );
534 for (
const auto &fd : std::as_const( featuresData ) )
543 for (
int idx = 0; idx < fields.
count(); ++idx )
546 bool checkUnique =
true;
551 if ( fd.attributes().contains( idx ) )
553 v = fd.attributes().value( idx );
560 && checkUniqueValue( idx, v ) )
562 && defaultValueDefinition.
isValid() )
567 v = layer->
defaultValue( idx, newFeature, evalContext );
573 && checkUniqueValue( idx, v ) ) )
578 if ( !providerDefault.isEmpty() )
588 && hasUniqueConstraint
589 && checkUniqueValue( idx, v ) ) )
605 v = fd.attributes().value( idx );
613 if ( checkUnique && hasUniqueConstraint )
615 if ( checkUniqueValue( idx, v ) )
619 if ( uniqueValue.isValid() )
623 if ( hasUniqueConstraint )
625 uniqueValueCache[ idx ].insert( v );
630 result.append( newFeature );
650 for (
int fieldIdx = 0; fieldIdx < fieldCount; ++fieldIdx )
660 attributeMap.insert( fieldIdx, feature.
attribute( fieldIdx ) );
673 referencedLayersBranch << layer;
675 const int effectiveMaxDepth = maxDepth > 0 ? maxDepth : 100;
686 while ( relatedFeaturesIt.
nextFeature( childFeature ) )
689 relation.referencingLayer()->startEditing();
691 const auto pairs = relation.fieldPairs();
697 childFeatureIds.insert(
duplicateFeature( relation.referencingLayer(), childFeature, project, duplicateFeatureContext, maxDepth, depth + 1, referencedLayersBranch ).
id() );
701 duplicateFeatureContext.setDuplicatedFeatures( relation.referencingLayer(), childFeatureIds );
711 std::unique_ptr<QgsVectorLayerFeatureSource> featureSource;
715 Q_ASSERT( QThread::currentThread() == qApp->thread() || feedback );
726 return featureSource;
734 attributes.reserve( fields.
size() );
736 for (
const QgsField &field : fields )
747 if ( lengthDiff > 0 )
753 else if ( lengthDiff < 0 )
757 attributes.reserve( fields.
count() );
759 for (
int i = attributeCount; i < fields.
count(); ++i )
781 for (
int index : pkIndexes )
790 bool newFHasGeom = newFGeomType !=
793 bool layerHasGeom = inputWkbType !=
797 if ( ( newFHasGeom && !layerHasGeom ) || !newFHasGeom )
801 resultFeatures.append( _f );
808 if ( geometries.count() != 1 )
811 for (
int j = 0; j < newF.
fields().count(); j++ )
815 resultFeatures.reserve( geometries.size() );
819 resultFeatures.append( _f );
825 resultFeatures.append( newF );
828 return resultFeatures;
837 for (
const auto &_f : features )
839 resultFeatures.append( _f );
842 return resultFeatures;
847 QList<QgsVectorLayer *>
layers;
848 QMap<QgsVectorLayer *, QgsFeatureIds>::const_iterator i;
849 for ( i = mDuplicatedFeatures.begin(); i != mDuplicatedFeatures.end(); ++i )
856 return mDuplicatedFeatures[layer];
861 if ( mDuplicatedFeatures.contains( layer ) )
862 mDuplicatedFeatures[layer] += ids;
864 mDuplicatedFeatures.insert( layer, ids );
874 mGeometry( geometry ),
875 mAttributes( attributes )
962 if ( !joinedFeature.
isValid() )
997 const bool hasEffects = maskSettings.
opacity() < 1 ||
1001 QgsMaskedLayer &maskedLayer = maskedLayers[currentRule][r.layerId()];
1010 QHash<QString, QgsMaskedLayers> maskedLayers;
1012 QString currentRule;
1018 LabelMasksVisitor visitor;
1020 return std::move( visitor.maskedLayers );
1037 bool visitSymbol(
const QgsSymbol *symbol )
1041 bool symbolHasEffect = symbol->
opacity() < 1;
1046 symbolHasEffect |= slHasEffects;
1051 slHasEffects |= visitSymbol( subSymbol );
1053 for (
const auto &mask : sl->
masks() )
1061 return symbolHasEffect;
1069 if ( symbolEntity->symbol() )
1070 visitSymbol( symbolEntity->symbol() );
1077 SymbolLayerVisitor visitor;
1079 return visitor.maskedLayers;
1089 QString displayString = exp.
evaluate( &context ).toString();
1091 return displayString;
1102 switch ( relation.strength() )
1108 const auto constFids = fids;
1114 while ( relatedFeaturesIt.
nextFeature( childFeature ) )
1116 childFeatureIds.insert( childFeature.
id() );
1120 if ( childFeatureIds.count() > 0 )
1122 if ( context.
layers().contains( relation.referencingLayer() ) )
1126 handledFeatureIds.unite( childFeatureIds );
1127 context.setDuplicatedFeatures( relation.referencingLayer(), handledFeatureIds );
1132 context.setDuplicatedFeatures( relation.referencingLayer(), childFeatureIds );
1151 if ( info.isEditable() && info.hasCascadedDelete() )
1154 const auto constFids = fids;
1159 joinFeatureIds.insert( joinFeature.
id() );
1162 if ( joinFeatureIds.count() > 0 )
1164 if ( context.
layers().contains( info.joinLayer() ) )
1168 handledFeatureIds.unite( joinFeatureIds );
1169 context.setDuplicatedFeatures( info.joinLayer(), handledFeatureIds );
1174 context.setDuplicatedFeatures( info.joinLayer(), joinFeatureIds );
1181 return !context.
layers().isEmpty();
1186 if ( foundFriendly )
1187 *foundFriendly =
false;
1199 static QStringList sCandidates{ QStringLiteral(
"name" ),
1200 QStringLiteral(
"title" ),
1201 QStringLiteral(
"heibt" ),
1202 QStringLiteral(
"desc" ),
1203 QStringLiteral(
"nom" ),
1204 QStringLiteral(
"street" ),
1205 QStringLiteral(
"road" ),
1206 QStringLiteral(
"label" ),
1208 QStringLiteral(
"titel" ),
1209 QStringLiteral(
"beschreibung" ),
1210 QStringLiteral(
"strasse" ),
1211 QStringLiteral(
"beschriftung" ) };
1218 static QStringList sAntiCandidates{ QStringLiteral(
"type" ),
1219 QStringLiteral(
"class" ),
1220 QStringLiteral(
"cat" ),
1222 QStringLiteral(
"typ" ),
1223 QStringLiteral(
"klasse" ),
1224 QStringLiteral(
"kategorie" )
1227 QString bestCandidateName;
1228 QString bestCandidateNameWithAntiCandidate;
1230 for (
const QString &candidate : sCandidates )
1232 for (
const QgsField &field : fields )
1234 const QString fldName = field.name();
1235 if ( fldName.contains( candidate, Qt::CaseInsensitive ) )
1237 bool isAntiCandidate =
false;
1238 for (
const QString &antiCandidate : sAntiCandidates )
1240 if ( fldName.contains( antiCandidate, Qt::CaseInsensitive ) )
1242 isAntiCandidate =
true;
1247 if ( isAntiCandidate )
1249 if ( bestCandidateNameWithAntiCandidate.isEmpty() )
1251 bestCandidateNameWithAntiCandidate = fldName;
1256 bestCandidateName = fldName;
1262 if ( !bestCandidateName.isEmpty() )
1266 QString candidateName = bestCandidateName.isEmpty() ? bestCandidateNameWithAntiCandidate : bestCandidateName;
1267 if ( !candidateName.isEmpty() )
1276 if ( candidateName == QLatin1String(
"gml_name" ) &&
1277 fields.
indexOf( QLatin1String(
"id" ) ) >= 0 )
1279 candidateName.clear();
1281 for (
const QgsField &field : std::as_const( fields ) )
1283 const QString fldName = field.name();
1284 if ( fldName != QLatin1String(
"gml_name" ) && fldName.endsWith( QLatin1String(
"_name" ) ) )
1286 candidateName = fldName;
1290 if ( candidateName.isEmpty() )
1293 candidateName = QStringLiteral(
"id" );
1297 if ( foundFriendly )
1298 *foundFriendly =
true;
1299 return candidateName;
1304 for (
const QgsField &field : fields )
1306 if ( field.type() == QMetaType::Type::QString )
1307 return field.name();
1311 return fields.
at( 0 ).
name();
@ AddFeatures
Allows adding features.
@ ChangeAttributeValues
Allows modification of attribute values.
@ Composition
Fix relation, related elements are part of the parent and a parent copy will copy any children or del...
@ Association
Loose relation, related elements are not part of the parent and a parent copy will not copy any child...
@ NoGeometry
Geometry is not required. It may still be returned if e.g. required for a filter condition.
@ NoFlags
No flags are set.
GeometryType
The geometry types are used to group Qgis::WkbType in a coarse way.
@ UnsetField
Clears the field value so that the data provider backend will populate using any backend triggers or ...
@ DefaultValue
Use default field value.
@ Duplicate
Duplicate original value.
@ Provider
Field originates from the underlying data provider of the vector layer.
@ Join
Field originates from a joined layer.
WkbType
The WKB type describes the number of dimensions a geometry has.
virtual bool accept(QgsStyleEntityVisitorInterface *visitor) const
Accepts the specified symbology visitor, causing it to visit all symbols associated with the labeling...
The QgsDefaultValue class provides a container for managing client side default values for fields.
bool isValid() const
Returns if this default value should be applied.
static QList< QgsExpressionContextScope * > globalProjectLayerScopes(const QgsMapLayer *layer)
Creates a list of three scopes: global, layer's project and layer.
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
void setFeature(const QgsFeature &feature)
Convenience function for setting a feature for the context.
void appendScopes(const QList< QgsExpressionContextScope * > &scopes)
Appends a list of scopes to the end of the context.
Class for parsing and evaluation of expressions (formerly called "search strings").
bool prepare(const QgsExpressionContext *context)
Gets the expression ready for evaluation - find out column indexes.
static QString quotedValue(const QVariant &value)
Returns a string representation of a literal value, including appropriate quotations where required.
bool hasParserError() const
Returns true if an error occurred when parsing the input expression.
QString evalErrorString() const
Returns evaluation error.
QString parserErrorString() const
Returns parser error.
static QString quotedColumnRef(QString name)
Returns a quoted column reference (in double quotes)
bool hasEvalError() const
Returns true if an error occurred when evaluating last input.
QVariant evaluate()
Evaluate the feature and return the result.
Wrapper for iterator of features from vector data provider or vector layer.
bool nextFeature(QgsFeature &f)
Fetch next feature and stores in f, returns true on success.
virtual bool accept(QgsStyleEntityVisitorInterface *visitor) const
Accepts the specified symbology visitor, causing it to visit all symbols associated with the renderer...
This class wraps a request for features to a vector layer (or directly its vector data provider).
QgsFeatureRequest & setFlags(Qgis::FeatureRequestFlags flags)
Sets flags that affect how features will be fetched.
QgsFeatureRequest & setLimit(long long limit)
Set the maximum number of features to request.
QgsFeatureRequest & setSubsetOfAttributes(const QgsAttributeList &attrs)
Set a subset of attributes that will be fetched.
QgsFeatureRequest & setFilterExpression(const QString &expression)
Set the filter expression.
QgsFeatureRequest & setNoAttributes()
Set that no attributes will be fetched.
QFlags< SinkFlag > SinkFlags
@ RegeneratePrimaryKey
This flag indicates, that a primary key field cannot be guaranteed to be unique and the sink should i...
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.
void initAttributes(int fieldCount)
Initialize this feature with the given number of fields.
void setAttributes(const QgsAttributes &attrs)
Sets the feature's attributes.
void setFields(const QgsFields &fields, bool initAttributes=false)
Assigns a field map with the feature to allow attribute access by attribute name.
int attributeCount() const
Returns the number of attributes attached to the feature.
void setValid(bool validity)
Sets the validity of the feature.
bool isValid() const
Returns the validity of this feature.
Q_INVOKABLE QVariant attribute(const QString &name) const
Lookup attribute value by attribute name.
void setGeometry(const QgsGeometry &geometry)
Set the feature's geometry.
Base class for feedback objects to be used for cancellation of something running in a worker thread.
bool isCanceled() const
Tells whether the operation has been canceled already.
Stores information about constraints which may be present on a field.
ConstraintStrength
Strength of constraints.
@ ConstraintStrengthNotSet
Constraint is not set.
ConstraintOrigin
Origin of constraints.
@ ConstraintOriginNotSet
Constraint is not set.
@ ConstraintOriginProvider
Constraint was set at data provider.
ConstraintStrength constraintStrength(Constraint constraint) const
Returns the strength of a field constraint, or ConstraintStrengthNotSet if the constraint is not pres...
ConstraintOrigin constraintOrigin(Constraint constraint) const
Returns the origin of a field constraint, or ConstraintOriginNotSet if the constraint is not present ...
QString constraintExpression() const
Returns the constraint expression for the field, if set.
@ ConstraintNotNull
Field may not be null.
@ ConstraintUnique
Field must have a unique value.
@ ConstraintExpression
Field has an expression constraint set. See constraintExpression().
QString constraintDescription() const
Returns the descriptive name for the constraint expression.
Encapsulate a field in an attribute table or data source.
bool convertCompatible(QVariant &v, QString *errorMessage=nullptr) const
Converts the provided variant to a compatible format.
Qgis::FieldDuplicatePolicy duplicatePolicy() const
Returns the field's duplicate policy, which indicates how field values should be handled during a dup...
QgsFieldConstraints constraints
Container of fields for a vector layer.
Q_INVOKABLE int indexOf(const QString &fieldName) const
Gets the field index from the field name.
Qgis::FieldOrigin fieldOrigin(int fieldIdx) const
Returns the field's origin (value from an enumeration).
int size() const
Returns number of items.
QgsField at(int i) const
Returns the field at particular index (must be in range 0..N-1).
int fieldOriginIndex(int fieldIdx) const
Returns the field's origin index (its meaning is specific to each type of origin).
Q_INVOKABLE int lookupField(const QString &fieldName) const
Looks up field's index from the field name.
A geometry is the spatial representation of a feature.
QVector< QgsGeometry > coerceToType(Qgis::WkbType type, double defaultZ=0, double defaultM=0) const
Attempts to coerce this geometry into the specified destination type.
Qgis::WkbType wkbType() const
Returns type of the geometry as a WKB type (point / linestring / polygon etc.)
bool enabled() const
Returns whether the effect is enabled.
Encapsulates a QGIS project, including sets of map layers and their styles, layouts,...
QgsRelationManager * relationManager
QList< QgsRelation > referencedRelations(const QgsVectorLayer *layer=nullptr) const
Gets all relations where this layer is the referenced part (i.e.
Defines a relation between matching fields of the two involved tables of a relation.
Represents a relationship between two vector layers.
virtual QgsStyle::StyleEntity type() const =0
Returns the type of style entity.
An interface for classes which can visit style entity (e.g.
@ SymbolRule
Rule based symbology or label child rule.
A label settings entity for QgsStyle databases.
A symbol entity for QgsStyle databases.
@ LabelSettingsEntity
Label settings.
QgsPaintEffect * paintEffect() const
Returns the current paint effect for the layer.
virtual QList< QgsSymbolLayerReference > masks() const
Returns masks defined by this symbol layer.
Abstract base class for all rendered symbols.
QgsSymbolLayer * symbolLayer(int layer)
Returns the symbol layer at the specified index.
qreal opacity() const
Returns the opacity for the symbol.
int symbolLayerCount() const
Returns the total number of symbol layers contained in the symbol.
Container for settings relating to a selective masking around a text.
QList< QgsSymbolLayerReference > maskedSymbolLayers() const
Returns a list of references to symbol layers that are masked by this buffer.
QgsPaintEffect * paintEffect() const
Returns the current paint effect for the mask.
double opacity() const
Returns the mask's opacity.
bool enabled() const
Returns whether the mask is enabled.
static bool runOnMainThread(const Func &func, QgsFeedback *feedback=nullptr)
Guarantees that func is executed on the main thread.
Represents a default, "not-specified" value for a feature attribute.
static bool isNull(const QVariant &variant, bool silenceNullWarnings=false)
Returns true if the specified variant should be considered a NULL value.
static QVariant createNullVariant(QMetaType::Type metaType)
Helper method to properly create a null QVariant from a metaType Returns the created QVariant.
virtual Q_INVOKABLE Qgis::VectorProviderCapabilities capabilities() const
Returns flags containing the supported capabilities.
virtual QgsAttributeList pkAttributeIndexes() const
Returns list of indexes of fields that make up the primary key.
virtual QString defaultValueClause(int fieldIndex) const
Returns any default value clauses which are present at the provider for a specified field index.
virtual QVariant defaultValue(int fieldIndex) const
Returns any literal default values which are present at the provider for a specified field index.
virtual bool skipConstraintCheck(int fieldIndex, QgsFieldConstraints::Constraint constraint, const QVariant &value=QVariant()) const
Returns true if a constraint check should be skipped for a specified field (e.g., if the value return...
Partial snapshot of vector layer's state (only the members necessary for access to features)
const QgsVectorLayerJoinInfo * joinForFieldIndex(int index, const QgsFields &fields, int &sourceFieldIndex) const
Finds the vector join for a layer field index.
bool containsJoins() const
Quick way to test if there is any join at all.
QgsFeature joinedFeatureOf(const QgsVectorLayerJoinInfo *info, const QgsFeature &feature) const
Returns the joined feature corresponding to the feature.
const QgsVectorJoinList & vectorJoins() const
Defines left outer join from our vector layer to some other vector layer.
bool hasUpsertOnEdit() const
Returns whether a feature created on the target layer has to impact the joined layer by creating a ne...
bool isEditable() const
Returns whether joined fields may be edited through the form of the target layer.
QgsVectorLayer * joinLayer() const
Returns joined layer (may be nullptr if the reference was set by layer ID and not resolved yet)
Contains mainly the QMap with QgsVectorLayer and QgsFeatureIds do list all the duplicated features.
QgsFeatureIds duplicatedFeatures(QgsVectorLayer *layer) const
Returns the duplicated features in the given layer.
QList< QgsVectorLayer * > layers() const
Returns all the layers on which features have been duplicated.
Encapsulate geometry and attributes for new features, to be passed to createFeatures.
QgsGeometry geometry() const
Returns geometry.
QgsAttributeMap attributes() const
Returns attributes.
QgsFeatureData(const QgsGeometry &geometry=QgsGeometry(), const QgsAttributeMap &attributes=QgsAttributeMap())
Constructs a new QgsFeatureData with given geometry and attributes.
static QgsFeature duplicateFeature(QgsVectorLayer *layer, const QgsFeature &feature, QgsProject *project, QgsDuplicateFeatureContext &duplicateFeatureContext, const int maxDepth=0, int depth=0, QList< QgsVectorLayer * > referencedLayersBranch=QList< QgsVectorLayer * >())
Duplicates a feature and it's children (one level deep).
QList< QgsVectorLayerUtils::QgsFeatureData > QgsFeaturesDataList
Alias for list of QgsFeatureData.
static bool valueExists(const QgsVectorLayer *layer, int fieldIndex, const QVariant &value, const QgsFeatureIds &ignoreIds=QgsFeatureIds())
Returns true if the specified value already exists within a field.
static QgsFeatureList makeFeatureCompatible(const QgsFeature &feature, const QgsVectorLayer *layer, QgsFeatureSink::SinkFlags sinkFlags=QgsFeatureSink::SinkFlags())
Converts input feature to be compatible with the given layer.
static QgsMaskedLayers symbolLayerMasks(const QgsVectorLayer *)
Returns all masks that may be defined on symbol layers for a given vector layer.
static QString guessFriendlyIdentifierField(const QgsFields &fields, bool *foundFriendly=nullptr)
Given a set of fields, attempts to pick the "most useful" field for user-friendly identification of f...
static QgsFeatureIterator getValuesIterator(const QgsVectorLayer *layer, const QString &fieldOrExpression, bool &ok, bool selectedOnly)
Create a feature iterator for a specified field name or expression.
static bool fieldEditabilityDependsOnFeature(const QgsVectorLayer *layer, int fieldIndex)
Returns true if the editability of the field at index fieldIndex from layer may vary feature by featu...
static QgsFeatureList makeFeaturesCompatible(const QgsFeatureList &features, const QgsVectorLayer *layer, QgsFeatureSink::SinkFlags sinkFlags=QgsFeatureSink::SinkFlags())
Converts input features to be compatible with the given layer.
static std::unique_ptr< QgsVectorLayerFeatureSource > getFeatureSource(QPointer< QgsVectorLayer > layer, QgsFeedback *feedback=nullptr)
Gets the feature source from a QgsVectorLayer pointer.
static QString getFeatureDisplayString(const QgsVectorLayer *layer, const QgsFeature &feature)
static QgsFeature createFeature(const QgsVectorLayer *layer, const QgsGeometry &geometry=QgsGeometry(), const QgsAttributeMap &attributes=QgsAttributeMap(), QgsExpressionContext *context=nullptr)
Creates a new feature ready for insertion into a layer.
static bool fieldIsEditable(const QgsVectorLayer *layer, int fieldIndex, const QgsFeature &feature)
Tests whether a field is editable for a particular feature.
static bool attributeHasConstraints(const QgsVectorLayer *layer, int attributeIndex)
Returns true if a feature attribute has active constraints.
static QList< double > getDoubleValues(const QgsVectorLayer *layer, const QString &fieldOrExpression, bool &ok, bool selectedOnly=false, int *nullCount=nullptr, QgsFeedback *feedback=nullptr)
Fetches all double values from a specified field name or expression.
QFlags< CascadedFeatureFlag > CascadedFeatureFlags
static bool fieldIsReadOnly(const QgsVectorLayer *layer, int fieldIndex)
static QHash< QString, QgsMaskedLayers > labelMasks(const QgsVectorLayer *)
Returns masks defined in labeling options of a layer.
static QgsFeatureList createFeatures(const QgsVectorLayer *layer, const QgsFeaturesDataList &featuresData, QgsExpressionContext *context=nullptr)
Creates a set of new features ready for insertion into a layer.
static QVariant createUniqueValue(const QgsVectorLayer *layer, int fieldIndex, const QVariant &seed=QVariant())
Returns a new attribute value for the specified field index which is guaranteed to be unique.
static bool impactsCascadeFeatures(const QgsVectorLayer *layer, const QgsFeatureIds &fids, const QgsProject *project, QgsDuplicateFeatureContext &context, QgsVectorLayerUtils::CascadedFeatureFlags flags=QgsVectorLayerUtils::CascadedFeatureFlags())
static QList< QVariant > getValues(const QgsVectorLayer *layer, const QString &fieldOrExpression, bool &ok, bool selectedOnly=false, QgsFeedback *feedback=nullptr)
Fetches all values from a specified field name or expression.
static QVariant createUniqueValueFromCache(const QgsVectorLayer *layer, int fieldIndex, const QSet< QVariant > &existingValues, const QVariant &seed=QVariant())
Returns a new attribute value for the specified field index which is guaranteed to be unique within r...
static bool validateAttribute(const QgsVectorLayer *layer, const QgsFeature &feature, int attributeIndex, QStringList &errors, QgsFieldConstraints::ConstraintStrength strength=QgsFieldConstraints::ConstraintStrengthNotSet, QgsFieldConstraints::ConstraintOrigin origin=QgsFieldConstraints::ConstraintOriginNotSet)
Tests a feature attribute value to check whether it passes all constraints which are present on the c...
static void matchAttributesToFields(QgsFeature &feature, const QgsFields &fields)
Matches the attributes in feature to the specified fields.
@ IgnoreAuxiliaryLayers
Ignore auxiliary layers.
Represents a vector layer which manages a vector based data sets.
QVariant maximumValue(int index) const FINAL
Returns the maximum value for an attribute column or an invalid variant in case of error.
QgsDefaultValue defaultValueDefinition(int index) const
Returns the definition of the expression used when calculating the default value for a field.
QgsFeatureIterator getFeatures(const QgsFeatureRequest &request=QgsFeatureRequest()) const FINAL
Queries the layer for features specified in request.
QgsExpressionContext createExpressionContext() const FINAL
This method needs to be reimplemented in all classes which implement this interface and return an exp...
const QgsAbstractVectorLayerLabeling * labeling() const
Access to const labeling configuration.
bool isEditable() const FINAL
Returns true if the provider is in editing mode.
Q_INVOKABLE Qgis::WkbType wkbType() const FINAL
Returns the WKBType or WKBUnknown in case of error.
QgsFeatureRenderer * renderer()
Returns the feature renderer used for rendering the features in the layer in 2D map views.
QString displayExpression
QgsFeatureIterator getSelectedFeatures(QgsFeatureRequest request=QgsFeatureRequest()) const
Returns an iterator of the selected features.
QgsVectorDataProvider * dataProvider() FINAL
Returns the layer's data provider, it may be nullptr.
QgsVectorLayerJoinBuffer * joinBuffer()
Returns the join buffer object.
QgsVectorLayer * clone() const override
Returns a new instance equivalent to this one.
QStringList uniqueStringsMatching(int index, const QString &substring, int limit=-1, QgsFeedback *feedback=nullptr) const
Returns unique string values of an attribute which contain a specified subset string.
bool addFeature(QgsFeature &feature, QgsFeatureSink::Flags flags=QgsFeatureSink::Flags()) FINAL
Adds a single feature to the sink.
virtual bool setSubsetString(const QString &subset)
Sets the string (typically sql) used to define a subset of the layer.
QVariant defaultValue(int index, const QgsFeature &feature=QgsFeature(), QgsExpressionContext *context=nullptr) const
Returns the calculated default value for the specified field index.
QgsEditFormConfig editFormConfig
Q_INVOKABLE QgsFeature getFeature(QgsFeatureId fid) const
Queries the layer for the feature with the given id.
QSet< QVariant > uniqueValues(int fieldIndex, int limit=-1) const FINAL
Calculates a list of unique values contained within an attribute in the layer.
static Qgis::GeometryType geometryType(Qgis::WkbType type)
Returns the geometry type for a WKB type, e.g., both MultiPolygon and CurvePolygon would have a Polyg...
QMap< int, QVariant > QgsAttributeMap
QList< QgsFeature > QgsFeatureList
QSet< QgsFeatureId > QgsFeatureIds
qint64 QgsFeatureId
64 bit feature ids negative numbers are used for uncommitted/newly added features
QList< int > QgsAttributeList
QList< QgsVectorLayerJoinInfo > QgsVectorJoinList
bool _fieldIsEditable(const QgsVectorLayer *layer, int fieldIndex, const QgsFeature &feature)
QHash< QString, QgsMaskedLayer > QgsMaskedLayers
masked layers where key is the layer id
QSet< QString > symbolLayerIds
Contains information relating to a node (i.e.
QString identifier
A string identifying the node.
QgsStyleEntityVisitorInterface::NodeType type
Node type.
Contains information relating to the style entity currently being visited.
const QgsStyleEntityInterface * entity
Reference to style entity being visited.