def test_field_is_read_only(self):
"""
Test fieldIsReadOnly
"""
layer = createLayerWithOnePoint()
# layer is not editable => all fields are read only
self.assertTrue(QgsVectorLayerUtils.fieldIsReadOnly(layer, 0))
self.assertTrue(QgsVectorLayerUtils.fieldIsReadOnly(layer, 1))
layer.startEditing()
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 0))
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 1))
field = QgsField('test', QVariant.String)
layer.addAttribute(field)
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 0))
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 1))
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 2))
# simulate read-only field from provider
field = QgsField('test2', QVariant.String)
field.setReadOnly(True)
layer.addAttribute(field)
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 0))
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 1))
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 2))
self.assertTrue(QgsVectorLayerUtils.fieldIsReadOnly(layer, 3))
layer.rollBack()
layer.startEditing()
# edit form config specifies read only
form_config = layer.editFormConfig()
form_config.setReadOnly(1, True)
layer.setEditFormConfig(form_config)
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 0))
self.assertTrue(QgsVectorLayerUtils.fieldIsReadOnly(layer, 1))
form_config.setReadOnly(1, False)
layer.setEditFormConfig(form_config)
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 0))
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 1))
# joined field
layer2 = QgsVectorLayer(
"Point?field=fldtxt2:string&field=fldint:integer", "addfeat",
"memory")
join_info = QgsVectorLayerJoinInfo()
join_info.setJoinLayer(layer2)
join_info.setJoinFieldName('fldint')
join_info.setTargetFieldName('fldint')
join_info.setUsingMemoryCache(True)
layer.addJoin(join_info)
layer.updateFields()
self.assertEqual([f.name() for f in layer.fields()],
['fldtxt', 'fldint', 'addfeat_fldtxt2'])
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 0))
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 1))
# join layer is not editable
self.assertTrue(QgsVectorLayerUtils.fieldIsReadOnly(layer, 2))
# make join editable
layer.removeJoin(layer2.id())
join_info.setEditable(True)
layer.addJoin(join_info)
layer.updateFields()
self.assertEqual([f.name() for f in layer.fields()],
['fldtxt', 'fldint', 'addfeat_fldtxt2'])
# should still be read only -- the join layer itself is not editable
self.assertTrue(QgsVectorLayerUtils.fieldIsReadOnly(layer, 2))
layer2.startEditing()
self.assertFalse(QgsVectorLayerUtils.fieldIsReadOnly(layer, 2))
# but now we set a property on the join layer which blocks editing for the feature...
form_config = layer2.editFormConfig()
form_config.setReadOnly(0, True)
layer2.setEditFormConfig(form_config)
# should now be read only -- the joined layer edit form config prohibits edits
self.assertTrue(QgsVectorLayerUtils.fieldIsReadOnly(layer, 2))
