Alterar formularios de Camadas recart para serem mais faceis de editar

alterar_formularios_recart.py

def field_readonly(layer, fieldname, option = True):
    '''
    Tornar o campo de uma camada vectorial nao editavel
    '''
    if layer.type() != QgsMapLayer.VectorLayer:
        return
    fields = layer.fields()
    field_idx = fields.indexOf(fieldname)
    if field_idx >= 0:
        form_config = layer.editFormConfig()
        form_config.setReadOnly(field_idx, option)
        layer.setEditFormConfig(form_config)
    
    return

def field_to_datetime(layer, fieldname):
    '''
    Configurar campo do tipo data de uma camada vectorial como DateTime
    Define um default now() no campo
    '''
    if layer.type() != QgsMapLayer.VectorLayer:
        return
    config = {'allow_null': True,
              'calendar_popup': True,
              'display_format': 'yyyy-MM-dd HH:mm:ss',
              'field_format': 'yyyy-MM-dd HH:mm:ss',
              'field_iso_format': False}
    type = 'DateTime'
    fields = layer.fields()
    field_idx = fields.indexOf(fieldname)
    if field_idx >= 0:
        widget_setup = QgsEditorWidgetSetup(type,config)
        layer.setEditorWidgetSetup(field_idx, widget_setup)
        layer.setDefaultValueDefinition(field_idx, QgsDefaultValue('now()'))
    
    return

def field_to_value_relation(layer):
    '''
    Configura os campos de uma camada vectorial com widget value relation
    usando camadas auxiliar com nome semelhante
    '''
    if layer.type() != QgsMapLayer.VectorLayer:
        return
    fields = layer.fields()
    pattern = re.compile(r'^valor_')
    fields_valor = [field for field in fields if pattern.match(field.name())]
    if len(fields_valor) > 0:
        config = {'AllowMulti': False,
                  'AllowNull': True,
                  'FilterExpression': '',
                  'Key': 'identificador',
                  'Layer': '',
                  'NofColumns': 1,
                  'OrderByValue': False,
                  'UseCompleter': False,
                   'Value': 'descricao'}
        for field in fields_valor:
            field_idx = fields.indexOf(field.name())
            if field_idx >= 0:
                print(field)
                try:
                    target_layer = QgsProject.instance().mapLayersByName(field.name())[0]
                    config['Layer'] = target_layer.id()
                    widget_setup = QgsEditorWidgetSetup('ValueRelation',config)
                    layer.setEditorWidgetSetup(field_idx, widget_setup)
                except:
                    pass
            else:
                return False
    else:
        return False
    return True

project = QgsProject.instance()
layers = project.mapLayers()

for layer in layers.values():
    field_readonly(layer,'identificador')
    field_readonly(layer,'fim_objecto')
    field_to_datetime(layer,'inicio_objeto')
    field_to_value_relation(layer)