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python - Python中出生日期的格式检查

问题描述

我目前正在开发一个数据库应用程序，用户填写客户表格并将数据添加到 SQLite3 表中。我正在尝试向我的代码添加验证，并且它可以正常工作，但是它将记录添加到带有无效数据的表中。如果数据无效，有什么方法可以停止代码的执行？请看下面的代码和界面截图：

    def validate(self):
        dateofbirth = self.DOBEntry.get()
        try:
            datetime.datetime.strptime(dateofbirth, '%D/%M/%Y')
        except ValueError:
            tkinter.messagebox.showerror("Error","Please enter the date of birth in the correct format DD-MM-YYYY")



    def AddCustomer(self):
        customerid = int(self.CustomerEntry.get())
        branchid = self.BranchEntry.get()
        name = self.NameEntry.get()
        surname = self.SurnameEntry.get()
        dateofbirth = self.DOBEntry.get()
        town = self.TownEntry.get()
        postcode = self.PostcodeEntry.get()
        email = self.EmailEntry.get()
        telephone = self.TelephoneEntry.get()
        medical = self.MedicalEntry.get()
        try:
            self.validate()
            with sqlite3.connect("LeeOpt.db") as db:
                cursor = db.cursor()
                add_customer = ('''INSERT INTO Customer(CustomerID, BranchID, Name, Surname, DateOfBirth, Town, Postcode, EmailAddress, TelephoneNo, MedicalConditions)
                VALUES (?,?,?,?,?,?,?,?,?,?)''')
                cursor.execute(add_customer, [(customerid),(branchid),(name),(surname),(dateofbirth),(town),(postcode),(email),(telephone),(medical)])
                tkinter.messagebox.showinfo("Notification","Customer added successfully")
                self.ClearEntries()
        except (sqlite3.IntegrityError): 
            tkinter.messagebox.showerror("Error","This CustomerID is already taken, please try another.")
            self.ClearID()

用户界面

标签： pythondatabasesqlitevalidationtkinter

解决方案

尝试这样的事情：

def validate(self):
    dateofbirth = self.DOBEntry.get()
    try:
        datetime.datetime.strptime(dateofbirth, '%D/%M/%Y')
        return True # returns a boolean True
    except ValueError: 
        tkinter.messagebox.showerror("Error","Please enter the date of birth in the correct format DD-MM-YYYY")
        return False

def AddCustomer(self):
    # Same code

    if self.validate(): # If true is returned, then...also same as if self.validate()==True
        try:
            with sqlite3.connect("LeeOpt.db") as db:
                cursor = db.cursor()
                add_customer = ('''INSERT INTO Customer(CustomerID, BranchID, Name, Surname, DateOfBirth, Town, Postcode, EmailAddress, TelephoneNo, MedicalConditions)
                VALUES (?,?,?,?,?,?,?,?,?,?)''')
                cursor.execute(add_customer, (customerid,branchid,name,surname,dateofbirth,town,postcode,email,telephone,medical))
                tkinter.messagebox.showinfo("Notification","Customer added successfully")
                self.ClearEntries()
        except (sqlite3.IntegrityError): 
            tkinter.messagebox.showerror("Error","This CustomerID is already taken, please try another.")
            self.ClearID()

True只有当行中没有错误时才会返回here ，否则False将返回，因此基于此，您创建一个ifinside AddCustomer()。我还将您的参数更改为executeatuple而不是 a list，因为它是惯例。

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