我使用tkinter和mongoengine制作了一个简单的注册表单。但由于某种原因,从tkinter输入框中获取的值在mongodb中存储为null或空。我猜问题是变量不是能够获取在tkinter输入框中输入的值,但由于代码看起来语法正确,我无法找到解决此问题的方法。
from tkinter import *
import tkinter.messagebox
from mongoengine import *
connect('demo')
class Registration(Document):
username = StringField(required=True,unique=True)
password = StringField(required=True)
def register():
if len(Registration.objects(username=name)) == 1:
tkinter.messagebox.showinfo("Oops!", "Username already taken")
else:
entry = Registration(
username=name,
password=pwd
)
entry.save()
tkinter.messagebox.showinfo("Notice", "Registered Successfully !")
# GUI
root = Tk()
root.title("Registration Demo")
frame = Frame(root,width=500,height=500)
frame.pack()
label1 = Label(frame,text="username")
label2 = Label(frame,text="password")
entry1 = Entry(frame)
entry2 = Entry(frame)
name = entry1.get()
pwd = entry2.get()
button = Button(frame,text="Register",command=register)
label1.grid(row=0,column=0,sticky=E)
label2.grid(row=1,column=0,sticky=E)
entry1.grid(row=0,column=1)
entry2.grid(row=1,column=1)
button.grid(columnspan=2)
root.mainloop()
这是mongodb表视图: Mongodb Output
正如您在输出中看到的那样,虽然用户输入了输入,但仍会创建id,但用户名和密码字段为空。
答案 0 :(得分:1)
这两行:
name = entry1.get()
pwd = entry2.get()
没有做你认为他们正在做的事情,你可以删除他们,因为他们没有帮助。
正在发生的事情是在程序开始时收集entry1
和entry2
的值,这总是等于空的刺痛,因为它在程序启动时被立即调用1次开始。这只发生一次,并且在您引用变量name
或pwd
时不会更新。您需要从函数内部调用entry1.get()
和entry2.get()
。
改变这个:
def register():
if len(Registration.objects(username=name)) == 1:
tkinter.messagebox.showinfo("Oops!", "Username already taken")
else:
entry = Registration(
username=name,
password=pwd
)
entry.save()
tkinter.messagebox.showinfo("Notice", "Registered Successfully !")
对此:
def register():
if len(Registration.objects(username=entry1.get())) == 1:
tkinter.messagebox.showinfo("Oops!", "Username already taken")
else:
entry = Registration(
username=entry1.get(),
password=entry2.get()
)
entry.save()
tkinter.messagebox.showinfo("Notice", "Registered Successfully !")