所以...wtforms-alchemy - 如何预先填充关系数据的表单?
此:
model_dictionary = model.as_dict() # some kind of dictionary
form = TheModelsForm(**model_dictionary) # https://wtforms-alchemy.readthedocs.io/en/latest/advanced.html
form.populate_obj(model)
return form
这让我的预填充模型的形式与那些db.Columns模型领域..嗯..怎么样型号db.relationships ?
上面的代码不预先填充关系字段;他们出现,但留空。无论我是否在model_dictonary中包含关系值(例如,model_dictionary ['key_from_other_object'] = associated value),只有db.Column字段预先填充了值。
这可以完成吗? --Can't找到这样的东西..
编辑: 我解决了我最初的问题:
form = TheModelsForm(obj=model)
form.populate_obj(model)
return form
现在,我试图找出如何获得该位置的事件模型实际显示的位置表格上...
class Event(Base):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String())
location_id = db.Column(db.Integer, db.ForeignKey('location.id'))
class Location(Base):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String())
events = db.relationship('Event', backref=db.backref('events'))
我敢肯定有就是为什么所有我注释掉的东西是不工作..我得到“NoneType”对象是一个合乎逻辑的理由不可迭代
class EventForm(ModelForm):
class Meta:
model = models.Event
location_id = fields.SelectField(u'Location', coerce=int)
class LocationForm(ModelForm):
class Meta:
model = models.Location
#events = fields.SelectField(u'Event', choices=[(g.id, g.selector) for g in models.Event.query.all()], coerce=int)
# events = fields.SelectMultipleField('Event',
# choices=[(g.id, g.selector) for g in models.Event.query.all()],
# coerce=int,
# option_widget=widgets.CheckboxInput(),
# widget=widgets.ListWidget(prefix_label=False)
# )
#events = ModelFieldList(fields.FormField(EventForm))