Question

我正在使用flask和sqlalchemy开发应用程序。我正在使用html表单收集数据，我想自动计算并将年龄插入用户数据库中的age列。但是数据库中的插入操作无效。

以下是model.py

 class Registration(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     name = db.Column('Name', db.String(50), nullable=False)
     hosp_num = db.Column('Hospital number', db.String(15), nullable=False)
     sex = db.Column('Sex', db.String(6), nullable=False)
     dob = db.Column('Date of Birth', db.String(10), nullable=False)
     age = db.Column('age', db.Integer)
     ...

def __init__(self, name, hosp_num, sex, dob, age):
    self.name = name
    self.hosp_num = hosp_num
    self.sex = sex
    self.dob = dob
    self.age = age
    ...

在app.py

def calculate_age(born):
    today = date.today()
    return today.year - born.year - ((today.month, today.day) < (born.month, born.day))

@app.route('/register', methods=['GET','POST'])
def register():
    ...
    try:
        date_of_birth = datetime.strptime(request.form['dob'], "%Y %m %d")
        age = calculate_age(date_of_birth)
        patient = Registration(request.form['name'], request.form['hosp_num'], request.form['sex'], request.form['dob'], age) 
        db.session.add(patient)
        db.session.commit()
        flash('Record was sucessfully saved')
        return redirect(url_for('index'))
    except:
        db.session.rollback()
        flash('Error in insert operation')
        return render_template('register.html')
    finally:
        db.session.close()
return render_template('register.html')

flask-sqlalchemy：自动将年龄输入年龄栏

0 个答案: