Доброго времени суток.
Помогите разобраться в Sql. Пытаюсь обновить единственную строку в базе, но простым UPDATE не получается обновить пустую запись.
Пробую добавить строку если база пустая, если нет то заменить. Но почему то .fetchall() и .fetchone() не хочет быть пустым.
Что тут не так?
import tkinter as tk
from tkinter import ttk
import sqlite3
class Main(tk.Frame):
def __init__(self, root):
super().__init__(root)
self.init_main()
self.db = db
self.view_records()
def init_main(self):
toolbar = tk.Frame(bg='#d7d8e0', bd=2)
toolbar.pack(side=tk.TOP, fill=tk.X)
self.add_img = tk.PhotoImage(file='savee.gif')
btn_open_dialog = tk.Button(toolbar, text='Настройки', command=self.open_dialog, bg='#d7d8e0', bd=0,
compound=tk.TOP, image=self.add_img)
btn_open_dialog.pack(side=tk.RIGHT)
self.add_img2 = tk.PhotoImage(file='savee.gif')
btn_open_dialog2 = tk.Button(toolbar, text='Пуск', command=self.open_dialog2, bg='#d7d8e0', bd=0,
compound=tk.TOP, image=self.add_img)
btn_open_dialog2.pack(side=tk.LEFT)
self.tree = ttk.Treeview(self, columns=('url', 'rep', 'obem', 'nick'), height=15, show='headings')
self.tree.column('url', width=200, anchor=tk.CENTER)
self.tree.column('rep', width=200, anchor=tk.CENTER)
self.tree.column('obem', width=200, anchor=tk.CENTER)
self.tree.column('nick', width=200, anchor=tk.CENTER)
self.tree.heading('url', text='url')
self.tree.heading('rep', text='rep')
self.tree.heading('obem', text='obem')
self.tree.heading('nick', text='nick')
self.tree.pack()
def records(self, url, rep, obem, nick):
self.db.insert_data(url, rep, obem, nick)
self.view_records()
def view_records(self):
self.db.c.execute('''SELECT * FROM finance''')
[self.tree.delete(i) for i in self.tree.get_children()]
[self.tree.insert('', 'end', values=row) for row in self.db.c.fetchall()]
print(self.db.c.fetchone())
print(self.tree.get_children)
def open_dialog(self):
Child()
def open_dialog2(self):
Child()
class Child(tk.Toplevel):
def __init__(self):
super().__init__(root)
self.init_child()
self.view = app
def init_child(self):
self.title('Настройки')
self.geometry('500x250+400+300')
self.resizable(False, False)
label_url = tk.Label(self, text='URL:')
label_url.place(x=20, y=20)
label_rep = tk.Label(self, text='реп')
label_rep.place(x=20, y=50)
label_obem = tk.Label(self, text='обьем <')
label_obem.place(x=20, y=80)
label_nick = tk.Label(self, text='Nickname')
label_nick.place(x=20, y=110)
self.entry_url = ttk.Entry(self)
self.entry_url.place(x=50, y=20)
self.entry_rep = ttk.Entry(self)
self.entry_rep.place(x=220, y=50)
self.entry_obem = ttk.Entry(self)
self.entry_obem.place(x=220, y=80)
self.entry_nick = ttk.Entry(self)
self.entry_nick.place(x=220, y=110)
btn_cancel = ttk.Button(self, text='Закрыть', command=self.destroy)
btn_cancel.place(x=300, y=170)
btn_ok = ttk.Button(self, text='Сохранить')
btn_ok.place(x=220, y=170)
btn_ok.bind('<Button-1>', lambda event: self.view.records(self.entry_url.get(),
self.entry_rep.get(),
self.entry_obem.get(),
self.entry_nick.get()))
self.grab_set()
self.focus_set()
class DB:
def __init__(self):
self.conn = sqlite3.connect('finance.db')
self.c = self.conn.cursor()
self.c.execute(
'''CREATE TABLE IF NOT EXISTS finance (url text, rep integer, obem integer, nick text)''')
self.conn.commit()
def insert_data(self, url, rep, obem, nick):
self.c.execute('''SELECT * FROM finance WHERE url''')
if self.c.fetchone() == False:
self.c.execute('''INSERT INTO finance(url, rep, obem, nick) VALUES (?, ?, ?, ?)''')
else:
self.c.execute('''UPDATE finance set url=?, rep=?, obem=?, nick=?''', (url, rep, obem, nick))
self.conn.commit()
if __name__ == "__main__":
root = tk.Tk()
db = DB()
app = Main(root)
app.pack()
root.title("тестовая")
root.geometry("850x550+300+200")
root.resizable(False, False)
root.mainloop()
