[PyQt] How to update a relationModel

[Stefano Z.]

hello

i need to know how to update a combobox linked to a datawidgetmapper
when the table in relation with the mapper model is modified by en external
application.

code:

    def setupModels(self):
        """
            Initialize all the application models
        """
        # setup masterModel
        self.mModel = QSqlRelationalTableModel(self)
        self.mModel.setTable(QString(" fattmaster"))
        self.mModel.setSort(MDATA, Qt.AscendingOrder)
        self.mModel.setRelation(MIDCLI, QSqlRelation("clienti",
                                            "id", "ragsoc"))
        self.mModel.setRelation(MIDTDOC, QSqlRelation("tipofatt",
                                            "id", "tfatt"))
        self.mModel.select()

    def setupMappers(self):
        '''
            Initialize all the application mappers
        '''
        self.mapper = QDataWidgetMapper(self)
        self.mapper.setSubmitPolicy(QDataWidgetMapper.ManualSubmit)
        self.mapper.setModel(self.mModel)
        self.mapper.setItemDelegate(QSqlRelationalDelegate(self))
        self.mapper.addMapping(self.dateEdit, MDATA)
        self.mapper.addMapping(self.fattLineEdit, MDOC)

        relationModel = self.mModel.relationModel(MIDTDOC)
        relationModel.setSort(1, Qt.AscendingOrder)
        relationModel.select()
        self.tipoFattComboBox.setModel(relationModel)

self.tipoFattComboBox.setModelColumn(relationModel.fieldIndex("tfatt"))
        self.mapper.addMapping(self.tipoFattComboBox, MIDTDOC)

        relationModel = self.mModel.relationModel(MIDCLI)
        relationModel.setSort(CRAGSOC, Qt.AscendingOrder)
        relationModel.select()
        self.cliComboBox.setModel(relationModel)
        self.cliComboBox.setModelColumn(relationModel.fieldIndex("ragsoc"))
        self.mapper.addMapping(self.cliComboBox, MIDCLI)

        self.mapper.addMapping(self.tipoPagLineEdit, MPAG)
        self.mapper.addMapping(self.cauLineEdit, MCAU)
        self.mapper.addMapping(self.noteLineEdit, MNOTE)
        self.mapper.toFirst()

    def editCustomers(self):
        # call the 'clienti' table editor
        subprocess.call(['python',os.path.join(os.path.dirname(__file__),
                        "clienti.py")])
        # update all controls
        self.setupModels()
        self.setupMappers()
        self.setupTables()
-------------------------

now, if an external application change (eg add a new record on 'clienti'
table) the 'clienti' table,
how to update the self.cliComboBox control ?

actually i'm 'rebuilding' all controls as you can see on the editCustomers
method, is this the only wahy to update the combobox control ?

thanks.



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