如何使按钮将数据插入我的数据库？

Question

I'm doing a little python product registration program and the database just doesn't open

I tried to open with sqlite3 library and by suggestion tried with QSqlDatabase, but nothing works. What could this error be? How to solve and connect?

i changed the database connection

path = r'C:\Users\Daniel\Desktop\Sistema NaruHodo\Banco de Dados'
conn = sqlite3.connect(path+r'\produtos.db')
cursor = conn.cursor()

Erro:

C:\Users\Daniel\AppData\Local\Programs\Python\Python37\pythonw.exe "C:/Users/Daniel/Desktop/Sistema NaruHodo/cadastroprodutos.py"

Process finished with exit code -1073740791 (0xC0000409)

Here is the def I'm using to try to get the field data and insert it into the database.

    def addProduto(self, produtotext, estoquetext, precocustotext, precovendatext, fornecedorcomboBox):
        path = r'C:\Users\Daniel\Desktop\Sistema NaruHodo\Banco de Dados'
        conn = sqlite3.connect(path+r'\produtos.db')
        produto = str(self.produtotext.text())
        estoque = float(self.estoquetext.text())
        precocusto = float(self.precocustotext.text())
        precovenda = float(self.precovendatext.text())
        fornecedor = str(self.fornecedorcomboBox.currentText())
        conn.execute(f"""INSERT INTO produ VALUES (null, {produto}, {estoque}, {precocusto}, {precovenda}, {fornecedor})""")
        conn.commit()

Answer 1

It looks like you're trying to display the database in a table. I recommend using a QSqlDatabase to create a connection to the database (it does support an SQLite driver). Using this instead of sqlite3 allows for better integration with the PyQt5 framework. Specifically, it can be easily hooked up with aQSqlTableModel and then displayed with aQTableView . For this approach, I suggest you familiarise yourself with model/view programming . It may seem more involved and complex than the QTableWidget you are currently using, but it's well worth it for the easy database integration it offers.

Excuse some of the doc links being for PySide2; the PyQt5 docs aren't exactly complete unfortunately.

Answer 2

I solved the problem, with QSqlDatabase it did not accept and gave drivers error, so I went back to sqlite3. But it was still crashing even connected, so I found that the problem was really in the function that I didn't convert to string

    def addProduto(self):
        self.banco = sqlite3.connect('Vendas.db')
        self.cursor = banco.cursor()
        Nome = self.produtotext.text()
        Quant = self.estoquetext.text()
        Valor = self.precocustotext.text()
        Preco = self.precovendatext.text()
        Forn = self.fornecedorcomboBox.currentText()
        if Nome != '' or Quant != '' or Valor != '' or Preco != '' or Forn != '':
            self.banco.execute(f"""INSERT INTO Produtos VALUES ('{Nome}',{Quant}, {Valor}, {Preco}, '{Forn}')""")
            self.banco.commit()
            self.LoadDatabase()
            self.limparcampos()