24 if ( a.size() != b.size() )
27 for (
int i = 0; i < a.size(); ++i )
46 return mIdentifierFields.value( 0 );
49void QgsFeatureFilterModel::requestToReloadCurrentFeature(
QgsFeatureRequest &request )
51 QStringList conditions;
52 for (
int i = 0; i < mIdentifierFields.count(); i++ )
66QSet<QString> QgsFeatureFilterModel::requestedAttributes()
const
68 return QSet<QString>( mIdentifierFields.begin(), mIdentifierFields.end() );
71QVariant QgsFeatureFilterModel::entryIdentifier(
const QgsFeatureExpressionValuesGatherer::Entry &entry )
const
73 return entry.featureId;
76QgsFeatureExpressionValuesGatherer::Entry QgsFeatureFilterModel::createEntry(
const QVariant &identifier )
const
78 const QVariantList constValues = identifier.toList();
81 for (
const QVariant &v : constValues )
82 values << QStringLiteral(
"(%1)" ).arg( v.toString() );
87bool QgsFeatureFilterModel::compareEntries(
const QgsFeatureExpressionValuesGatherer::Entry &a,
const QgsFeatureExpressionValuesGatherer::Entry &b )
const
92bool QgsFeatureFilterModel::identifierIsNull(
const QVariant &identifier )
const
94 const QVariantList values = identifier.toList();
95 for (
const QVariant &value : values )
105QVariant QgsFeatureFilterModel::nullIdentifier()
const
107 QVariantList nullValues;
108 for (
int i = 0; i < mIdentifierFields.count(); i++ )
115 return mIdentifierFields;
129QgsFeatureExpressionValuesGatherer *QgsFeatureFilterModel::createValuesGatherer(
const QgsFeatureRequest &request )
const
138 if ( values.count() != mIdentifierFields.count() )
140 return nullIdentifier().toList();
static QString createFieldEqualityExpression(const QString &fieldName, const QVariant &value, QMetaType::Type fieldType=QMetaType::Type::UnknownType)
Create an expression allowing to evaluate if a field is equal to a value.
void setExtraIdentifierValues(const QVariantList &extraIdentifierValues)
Allows specifying one value that does not need to match the filter criteria but will still be availab...
void setExtraIdentifierValueToNull() override
Allows specifying one value that does not need to match the filter criteria but will still be availab...
Q_DECL_DEPRECATED QString identifierField() const
The identifier field should be a unique field that can be used to identify individual features.
QgsFeatureFilterModel(QObject *parent=nullptr)
Create a new QgsFeatureFilterModel, optionally specifying a parent.
QStringList identifierFields
A set of fields of sourceLayer that is unique and should be used to identify features.
QVariantList extraIdentifierValues
The values that identifies the current feature.
void identifierFieldsChanged()
The identifier field should be a unique field that can be used to identify individual features.
void setIdentifierFields(const QStringList &identifierFields)
The identifier field should be a unique field that can be used to identify individual features.
Provides a list of features based on filter conditions.
void setExtraIdentifierValue(const QVariant &extraIdentifierValue)
Allows specifying one value that does not need to match the filter criteria but will still be availab...
void setFetchLimit(int fetchLimit)
Defines the feature request fetch limit If set to 0, no limit is applied when fetching.
void setFetchGeometry(bool fetchGeometry)
Defines if the geometry will be fetched.
void setExtraIdentifierValueUnguarded(const QVariant &identifierValue)
This will set the identifier value to be set in the model even if it doesn't exist currently in the d...
QVariant mExtraIdentifierValue
The current identifier value.
QgsVectorLayer * sourceLayer
QString displayExpression
This class wraps a request for features to a vector layer (or directly its vector data provider).
QgsFeatureRequest & setFilterExpression(const QString &expression)
Set the filter expression.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
Container of fields for a vector layer.
This class is a composition of two QSettings instances:
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.
bool qgsVariantEqual(const QVariant &lhs, const QVariant &rhs)
Compares two QVariant values and returns whether they are equal, two NULL values are always treated a...
bool qVariantListCompare(const QVariantList &a, const QVariantList &b)