QSqltable canFetchMore advice

q&a
,
1

I noticed this odd issue a few weeks ago and only recently found out the why and wondering if anyone has any pyqt5 snippets for qsortfilter model with canfetchmore.

References i could find for regular QT

Basically unless i load a further section in the DB first and then try again my search which has stuff in it its missing results. Was super frustrating as it took awhile to find out how to trigger the whole DB but i’d like to properly implement it so it shows all the stuff.

Excerpt of my current bits for QSqltable and its using sqlite driver for the DB

In Main

        self.commandcategorydropdown.setCurrentText('All')

        db.open()
        self.model = QSqlTableModel()
        self.initializedModel()
        #
        # self.commands.tableView = QTableView()
        # self.commands.tableView.setModel(self.model)
        #  self.tableView = QTableView(self.commandsbox)
        self.tableView.verticalHeader().setVisible(False)
        # self.tableView.resizeColumnsToContents()
        # self.tableView.resizeRowsToContents()
        # self.tableView.horizontalHeader().setVisible(False)
        # self.tableView.horizontalHeader().setDefaultAlignment(Qt.AlignLeft)
        self.tableView.horizontalHeader().setStretchLastSection(True)
        self.source_model = self.model
        # self.initializedModel()
        self.proxy_model = QSortFilterProxyModel(self.source_model)
        self.proxy_model.setSourceModel(self.source_model)
        self.tableView.setModel(self.proxy_model)
        self.tableView.hideColumn(0)
        self.tableView.hideColumn(1)
        self.tableView.hideColumn(3)
        self.tableView.hideColumn(4)
        self.tableView.hideColumn(5)
        self.tableView.hideColumn(6)
        self.tableView.hideColumn(7)
        # self.proxy_model.setFilterRegExp(QRegExp(self.searchcommands.text(), Qt.CaseInsensitive,
        #                                         QRegExp.FixedString))

        # self.proxy_model.setFilterKeyColumn(-1)
        self.tableView.setSortingEnabled(True)
        self.tableView.setEditTriggers(QAbstractItemView.NoEditTriggers)
        # self.tableView.setWordWrap(True)
        # self.command_description = QLabel()
        # self.command_description.setWordWrap(True)
        # self.command_requires_label = QLabel('')
        # self.command_requires_label.setWordWrap(True)
        # self.verticalLayout_8.addWidget(self.commandsbox)
        # self.verticalLayout_8.addWidget(self.tableView)
        # self.verticalLayout_8.addWidget(self.searchcommands)
        # self.verticalLayout_8.addWidget(self.command_requires_label)
        # self.verticalLayout_8.addWidget(self.command_description)
        self.commandcategorydropdown.activated.connect(self.current_activated_category)

    def on_searchcommands_update(self):
        self.proxy_model.setFilterRegExp(QRegExp(self.searchcommands.text(), Qt.CaseInsensitive,
                                                 QRegExp.FixedString))
        self.proxy_model.setFilterKeyColumn(-1)


    def current_activated_category(self):
        global command_category
        command_category = str(self.commandcategorydropdown.currentText())
        print(str(self.commandcategorydropdown.currentText()))
        # db.open()
        # self.commandslist.projectModel.setQuery(
        #     QtSql.QSqlQuery("SELECT command_alias, command FROM commands WHERE category = '%s'" % command_category))
        # self.commandslist.projectView = QListView(self.commandslist)
        # self.commandslist.projectView.setModel(self.commandslist.projectModel)
        # db.close()
        self.command_description.setText('')
        self.command_requires_label.setText('')
        self.searchcommands.setText('')

        if command_category == 'All':
            self.proxy_model.setFilterRegExp(QRegExp(self.searchcommands.text(), Qt.CaseInsensitive,
                                                     QRegExp.FixedString))
            self.proxy_model.setFilterKeyColumn(-1)
        else:
            self.proxy_model.setFilterRegExp(QRegExp(self.commandcategorydropdown.currentText(), Qt.CaseSensitive,
                                                     QRegExp.FixedString))
            self.proxy_model.setFilterKeyColumn(1)
        # db.close()

    def on_searchcommands_update(self):
        self.proxy_model.setFilterRegExp(QRegExp(self.searchcommands.text(), Qt.CaseInsensitive,
                                                 QRegExp.FixedString))
        self.proxy_model.setFilterKeyColumn(-1)


    def initializedModel(self):
        self.model.setTable("commands")
        # self.model.setEditStrategy(QSqlTableModel.OnFieldChange)
        self.model.setEditStrategy(QSqlTableModel.OnManualSubmit)
        self.model.select()
        self.model.setHeaderData(0, Qt.Horizontal, "ID")
        self.model.setHeaderData(1, Qt.Horizontal, "Category")
        self.model.setHeaderData(2, Qt.Horizontal, "command_alias")
        self.model.setHeaderData(3, Qt.Horizontal, "command")
        self.model.setHeaderData(4, Qt.Horizontal, "requires")
        self.model.setHeaderData(5, Qt.Horizontal, "description")
        self.model.setHeaderData(6, Qt.Horizontal, "controlpanel")
        self.model.setHeaderData(7, Qt.Horizontal, "verification")

    def onAddRow(self):
        self.model.insertRows(self.model.rowCount(), 1)
        self.model.submit()

    def onDeleteRow(self):
        self.model.removeRow(self.tableView.currentIndex().row())
        self.model.submit()
        self.model.select()

    def closeEvent(self, event):
        db.close()

Any advice or guidance would be greatly appreciated. The ‘current_activated_category’ and ‘on_searchcommands_update’ function is what i use to filter results by qcombobox and lineedit so would need to ideally work when these are called.

2

Ended up getting this problem sorted by using the below snippet at the end of the “initializedModel” function. Now loads all into and works on start without having to trigger manual stuff in the UI

def initializedModel(self):

    while self.model.canFetchMore():
        self.model.fetchMore()
    self.model.rowCount()

leaving this here in case anyone else runs into the same issue.

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