QgsJsonUtils class

Helper utilities for working with JSON and GeoJSON conversions.

Public static functions

static auto encodeValue(const QVariant& value) -> QString: Encodes a value to a JSON string representation, adding appropriate quotations and escaping where required.
static auto exportAttributes(const QgsFeature& feature, QgsVectorLayer* layer = nullptr, const QVector<QVariant>& attributeWidgetCaches = QVector<QVariant>()) -> QString: Exports all attributes from a QgsFeature as a JSON map type.
static auto parseArray(const QString& json, QVariant::Type type) -> QVariantList: Parse a simple array (depth=1).
static auto stringToFeatureList(const QString& string, const QgsFields& fields, QTextCodec* encoding) -> QgsFeatureList: Attempts to parse a GeoJSON string to a collection of features.
static auto stringToFields(const QString& string, QTextCodec* encoding) -> QgsFields: Attempts to retrieve the fields from a GeoJSON string representing a collection of features.

Encodes a value to a JSON string representation, adding appropriate quotations and escaping where required.

Parameters
value	value to encode
Returns	encoded value

Exports all attributes from a QgsFeature as a JSON map type.

Parameters
feature	feature to export
layer	optional associated vector layer. If specified, this allows richer export utilising settings like the layer's fields widget configuration.
attributeWidgetCaches	optional widget configuration cache. Can be used to speed up exporting the attributes for multiple features from the same layer.

Parse a simple array (depth=1).

Parameters
json	the JSON to parse
type	the type of the elements

Attempts to parse a GeoJSON string to a collection of features.

Parameters
string	GeoJSON string to parse
fields	fields collection to use for parsed features
encoding	text encoding
Returns	list of parsed features, or an empty list if no features could be parsed

Attempts to retrieve the fields from a GeoJSON string representing a collection of features.

Parameters
string	GeoJSON string to parse
encoding	text encoding
Returns	retrieved fields collection, or an empty list if no fields could be determined from the string