Question

我有一个Flask-WTF表单，其中包含用于选择相关对象的选项字段。当我尝试验证表单时，form.errors始终显示“Datacener：Not a valid choice”。

class Datacenter(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    server = db.relationship('Server', backref='datacenter', lazy=True)
    tier = db.Column(db.Integer)

class Server(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    os = db.Column(db.String(64))
    datacener_id=db.Column(db.Integer, db.ForeignKey('datacenter.id'), nullable=False)

class ServerForm(FlaskForm):       
    datacener_id = SelectField('Datacener', choices=[(x.id, x.name) for x in db.session.query(Datacener).all()])

@app.route('/add_server', methods = ['POST', 'GET'])
def add_server():
    form = ServerForm(request.form)
    if request.method=='POST' and form.validate():
        data = Server(datacener_id=form.datacener_id.data)
        db.session.add(data)
        db.session.commit()
        flash('Server created successfully!')
        return redirect('/')
    return render_template('new_server.html', form=form)

我假设这不起作用，因为模型之间的一对多关系。因为没有此连接的相同表单可以正常工作。

----编辑形式---

class ServerForm(FlaskForm):    
    number = IntegerField('Number')   
    name = StringField('Name')
    factory = StringField('Factory')
    model = StringField('Model')
    serial = IntegerField('Serial')
    os = StringField('OS')
    datacener_id = SelectField()


    def __init__(self, *args, **kwargs):
        self.datacener_id.kwargs['choices'] = [(x, x) for x in session.get('datacener', ('not set',))]        
        FlaskForm.__init__(self, *args, **kwargs)

相关模型的Flask-WTF选择永远不会有效

0 个答案: