def testExportAttributes(self):
""" test exporting feature's attributes to JSON object """
fields = QgsFields()
# test empty attributes
feature = QgsFeature(fields, 5)
expected = "{}"
self.assertEqual(QgsJSONUtils.exportAttributes(feature), expected)
# test feature with attributes
fields.append(QgsField("name", QVariant.String))
fields.append(QgsField("cost", QVariant.Double))
fields.append(QgsField("population", QVariant.Int))
feature = QgsFeature(fields, 5)
feature.setGeometry(QgsGeometry(QgsPointV2(5, 6)))
feature.setAttributes(['Valsier Peninsula', 6.8, 198])
expected = """{"name":"Valsier Peninsula",
"cost":6.8,
"population":198}"""
self.assertEqual(QgsJSONUtils.exportAttributes(feature), expected)
def testExportAttributes(self):
""" test exporting feature's attributes to JSON object """
fields = QgsFields()
# test empty attributes
feature = QgsFeature(fields, 5)
expected = "{}"
self.assertEqual(QgsJSONUtils.exportAttributes(feature), expected)
# test feature with attributes
fields.append(QgsField("name", QVariant.String))
fields.append(QgsField("cost", QVariant.Double))
fields.append(QgsField("population", QVariant.Int))
feature = QgsFeature(fields, 5)
feature.setGeometry(QgsGeometry(QgsPointV2(5, 6)))
feature.setAttributes(['Valsier Peninsula', 6.8, 198])
expected = """{"name":"Valsier Peninsula",
"cost":6.8,
"population":198}"""
self.assertEqual(QgsJSONUtils.exportAttributes(feature), expected)
fields_list = [
QgsField("name", QVariant.String),
QgsField("age", QVariant.Int),
QgsField("size", QVariant.Double)
]
for f in fields_list:
fields.append(f)
feature = QgsFeature(fields)
feature.setGeometry(QgsGeometry.fromPoint(QgsPoint(60, 5)))
feature.setAttributes(["George", 34, 1.69])
# Exports all attributes from a QgsFeature as a JSON map type.
with codecs.open('feature.json', 'wb', encoding='utf-8') as f:
json_text = QgsJSONUtils.exportAttributes(feature)
f.write(json_text)
# Attempts to retrieve the fields from a GeoJSON string representing a
# collection of features.
fields = QgsJSONUtils.stringToFields(
geojson_contributors_string,
QTextCodec.codecForName('UTF-8')
)
for f in fields:
print(f.name(), f.type())
# Attempts to parse a GeoJSON string to a collection of features.
features = QgsJSONUtils.stringToFeatureList(
geojson_contributors_string,
