Как правильно вставить данные из QLineEdit в базу данных postgre?

Question

[kan3k1k3n]

есть оконное приложение, где в элемент QLineEdit вводятся различные данные (айди, кличка, пол, порода).
вот часть кода, где происходит парсинг и вставка в бд:

def add_row_to_table(self, animal_id, name, gender, age, species, reserve, date_of_receipt, pickup_date):
        row_position = self.animals_table.rowCount()
        self.animals_table.insertRow(row_position)

        item_animal_id = QTableWidgetItem(str(animal_id))
        item_animal_id.setTextAlignment(Qt.AlignCenter)
        self.animals_table.setItem(row_position, 0, item_animal_id)

        item_name = QTableWidgetItem(name)
        item_name.setTextAlignment(Qt.AlignCenter)
        self.animals_table.setItem(row_position, 1, item_name)

        item_gender = QTableWidgetItem(gender)
        item_gender.setTextAlignment(Qt.AlignCenter)
        self.animals_table.setItem(row_position, 2, item_gender)

        item_age = QTableWidgetItem(age)
        item_age.setTextAlignment(Qt.AlignCenter)
        self.animals_table.setItem(row_position, 3, item_age)

        item_species = QTableWidgetItem(species)
        item_species.setTextAlignment(Qt.AlignCenter)
        self.animals_table.setItem(row_position, 4, item_species)

        item_reserve = QTableWidgetItem(reserve)
        item_reserve.setTextAlignment(Qt.AlignCenter)
        self.animals_table.setItem(row_position, 5, item_reserve)

        item_date_of_receipt = QTableWidgetItem(date_of_receipt)
        item_date_of_receipt.setTextAlignment(Qt.AlignCenter)
        self.animals_table.setItem(row_position, 6, item_date_of_receipt)

        item_pickup_date = QTableWidgetItem(pickup_date)
        item_pickup_date.setTextAlignment(Qt.AlignCenter)
        self.animals_table.setItem(row_position, 7, item_pickup_date)

    def add_animal(self):
        animal_id, name, gender, age, species, reserve, date_of_receipt, pickup_date, ok = self.get_input()
        if ok:
            self.add_row_to_table(animal_id, name, gender, age, species, reserve, date_of_receipt, pickup_date)
            self.insert_into_database(animal_id, name, gender, age, species, reserve, date_of_receipt, pickup_date)

    def get_input(self):
        dialog = QDialog(self)
        dialog.setWindowTitle('добавление животного')
        dialog.resize(700, 100)

        animal_id_input = QLineEdit()
        name_input = QLineEdit()
        gender_input = QLineEdit()
        age_input = QLineEdit()
        species_input = QLineEdit()
        reserve_input = QLineEdit()
        date_of_receipt_input = QLineEdit()
        pickup_date_input = QLineEdit()

        animal_id_label = QLabel('id:')
        name_label = QLabel('имя:')
        gender_label = QLabel('вид:')
        age_label = QLabel('возраст:')
        species_label = QLabel('порода:')
        reserve_label = QLabel('зарезервирован(а):')
        date_of_receipt_label = QLabel('дата поступления:')
        pickup_date_label = QLabel('дата забора:')

        font = QFont('Gertrude', 9)
        animal_id_label.setFont(font)
        name_label.setFont(font)
        gender_label.setFont(font)
        age_label.setFont(font)
        species_label.setFont(font)
        reserve_label.setFont(font)
        date_of_receipt_label.setFont(font)
        pickup_date_label.setFont(font)

        layout = QFormLayout()
        layout.addRow(animal_id_label, animal_id_input)
        layout.addRow(name_label, name_input)
        layout.addRow(gender_label, gender_input)
        layout.addRow(age_label, age_input)
        layout.addRow(species_label, species_input)
        layout.addRow(reserve_label, reserve_input)
        layout.addRow(date_of_receipt_label, date_of_receipt_input)
        layout.addRow(pickup_date_label, pickup_date_input)

        button_box = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)

        def handle_close():
            dialog.deleteLater()

        button_box.accepted.connect(handle_close)
        button_box.rejected.connect(handle_close)

        layout.addWidget(button_box)
        dialog.setLayout(layout)

        if dialog.exec_() == QDialog.Accepted:
            animal_id = animal_id_input.text().strip()
            name = name_input.text().strip()
            gender = gender_input.text().strip()
            age = age_input.text().strip()
            species = species_input.text().strip()
            reserve = reserve_input.text().strip()
            date_of_receipt = date_of_receipt_input.text().strip()
            pickup_date = pickup_date_input.text().strip()
            return animal_id, name, gender, age, species, reserve, date_of_receipt, pickup_date, True
        else:
            return '', '', '', '', '', '', '', '', False

    def insert_into_database(self, animal_id, name, gender, age, species, reserve, date_of_receipt, pickup_date):
        try:
            connection = psycopg2.connect(
                host='localhost',
                port=5432,
                database='test',
                user='postgres',
                password='4r5t2w1q'
            )
            cursor = connection.cursor()
            cursor.execute('INSERT INTO cats_admin (id, name, gender, age, species, reserve, date_of_receipt, pickup_date) VALUES (%s, %s, %s, %s, %s, %s, %s, %s)',
                        (animal_id, name, gender, age, species, reserve, date_of_receipt, pickup_date))
            connection.commit()
            connection.close()
        except Exception as e:
            print(f'ошибка добавления в базу данных: {e}')

но потом просто ничего не происходит. новая запись не появляется ни в таблице приложения, ни в базе данных, ошибок не появляется. подскажите, как сделать правильно?
p.s тип даннных у столбца "id" в базе данных - integer, может проблема в этом?