python wtf AttributeError：'ObjectIdField'对象没有属性'help_text' [英] python wtf AttributeError: 'ObjectIdField' object has no attribute 'help_text'
问题描述
基于这个教程我正在尝试创建一个表单来获得一些测量结果。似乎显示数据的部分正在工作，但是当使用 model_form 命令生成输入表单时，它会中断这个错误：
文件/myproject/lib/python3.4/site-packages/flask_mongoengine/wtf/orm.py，第49行，转换
'description'： field.help_text或''，
AttributeError：'ObjectIdField'对象没有'help_text'属性
错误发生在我的代码的这一行：
form_cls = model_form（Measurement，exclude = 'id'，'created_at'，'comments'））
这是我的view.py代码：
from flask导入Blueprint，request，redirect，render_template，url_for flask.views中的
import MethodView
from flask.ext.mongoengine.wtf从pyReefLog.models导入model_form
导入测量
度量= Blueprint（'measurements'， __name__，template_folder ='templates'）
class List（MethodView）：
cls =测量
def get（self）：
measurement = self.cls.objects.all（）
return render_template（'measurements / list.html'，measurements = measurements）
class Detail（MethodView）：
$ b $ def get_context（self，creator = None）：
form_cls = model_form（Measurement，exclude =（'id'，'created_at'，'comments'））
如果创建者：
measurement = Measurement.objects.get_or_404（creator = creator）
if request.method =='POST'：
form = form_cls（request.form，inital = measurement。 （$）
其他：
form = form_cls（obj = measurement）
else：
measurement = Measurement（）
form = form_cls（request.form）
context = {
measurement：measurement，
form：form，
create：creator是None
}
返回上下文
def get（self，creator）：
context = self.get_context（creator）
return render_template（'measurements / detail.html'，** context）
def post（self，creator）：
context = self.get_context （创建者）
form = context.get（'form'）
如果form.validate（）：
post = context.get（'post'）
form.populate_obj（post）
post.save（）
return redirect（url_for（'measurements.index'））
return render_template（'measurements / detail.html'， **上下文）
＃注册网址
measurements.add_url_rule（'/'，view_func = List.as_view（'index'））
measurements.add_url_rule （'/ create /'，defaults = {'creator'：None}，view_func = Detail.as_view（'create'））
measurements.add_url_rule（'/< creator> /'，v iew_func = Detail.as_view（'edit'））
这是我的models.py:
导入日期时间$ b $从烧瓶导入url_for
从pyReefLog导入数据库
class Comment（db.EmbeddedDocument）：
created_at = db.DateTimeField（default = datetime.datetime.now，required = True）
body = db.StringField（verbose_name =Comment，required = True）
author = db.StringField（verbose_name =Name，max_length = 255，required = True）
class测量（db.Document）：
created_at = db.DateTimeField（default = datetime.datetime.now，required = True）
measured_at = db.DateTimeField（default = datetime.datetime.now，required = True）
alkalinity = db.DecimalField默认= 0.0，精度= 2）
calcium = db.DecimalField（默认= 0.0，精度= 2）
镁= db.DecimalField（默认= 0.0，精度= 2）
ph = db.DecimalField（default = 0.0，precision = 2）
phosphate = db.DecimalField（defau （默认= 0.0，精度= 2）
温度= db.DecimalField（默认= 0.0，精度= 2）
创建者= db.stringField（required = True，max_length = 255）
comments = db.ListField（db.EmbeddedDocumentField（'Comment'））
$ b $ def get_absolute_url（self）：
return url_for（'measurement'，kwargs = {creator：self.creator}）
def __unicode __（self）：
return self.creator
meta = {
'allow_inheritance'：真，
'索引'：['-created_at'，'-measured_at'，'creator']，
'ordered'：['-measured_at']
}
wtForms教程没有提及与help_text属性相关的任何内容。
任何人都可以明白有什么不对吗？
根据用户Jérôme的评论＃2，当前版本（编辑时为0.7.5）烧瓶-mongoengine（和mongoengine 0.10.5）直接从框。测试和验证。
我正在做同样的教程，也遇到了错误。
code> help_text =Your helptext here。到models.py中的字段（这些是字符串字段），并解决了这个问题，但是你的错误指向ObjectIdField，这使得它很多令人费解的。
所以这不是很有帮助，但也许它会激励你在正确的方向。编辑：
我为此苦苦挣扎了一阵子，结果发现mongoengine发生了变化，破坏了flask_mongoengine。 这个在flask_mongoengine中的提交反过来修复了这个问题。
至于实际的解决方案，使用以前版本的mongoengine（0.10.1）为我工作。所以：
$ pip uninstall mongoengine
$ pip install mongoengine == 0.10.1
Based on this tutorial I am trying to create a form to get a few measurements. It seems that the part to display the data is working but when using the model_form command to generate the input form it breaks with this error:
File "/myproject/lib/python3.4/site-packages/flask_mongoengine/wtf/orm.py", line 49, in convert 'description': field.help_text or '',
AttributeError: 'ObjectIdField' object has no attribute 'help_text'
The error happens on this line of my code:
form_cls = model_form(Measurement, exclude=('id', 'created_at', 'comments'))
This is my view.py code:
from flask import Blueprint, request, redirect, render_template, url_for
from flask.views import MethodView
from flask.ext.mongoengine.wtf import model_form
from pyReefLog.models import Measurement
measurements = Blueprint('measurements', __name__, template_folder='templates')
class List(MethodView):
cls = Measurement
def get(self):
measurements = self.cls.objects.all()
return render_template('measurements/list.html', measurements=measurements)
class Detail(MethodView):
def get_context(self, creator=None):
form_cls = model_form(Measurement, exclude=('id', 'created_at', 'comments'))
if creator:
measurement = Measurement.objects.get_or_404(creator=creator)
if request.method == 'POST':
form = form_cls(request.form, inital=measurement._data)
else:
form = form_cls(obj=measurement)
else:
measurement = Measurement()
form = form_cls(request.form)
context = {
"measurement": measurement,
"form": form,
"create": creator is None
}
return context
def get(self, creator):
context = self.get_context(creator)
return render_template('measurements/detail.html', **context)
def post(self, creator):
context = self.get_context(creator)
form = context.get('form')
if form.validate():
post = context.get('post')
form.populate_obj(post)
post.save()
return redirect(url_for('measurements.index'))
return render_template('measurements/detail.html', **context)
# Register the urls
measurements.add_url_rule('/', view_func=List.as_view('index'))
measurements.add_url_rule('/create/', defaults={'creator': None}, view_func=Detail.as_view('create'))
measurements.add_url_rule('/<creator>/', view_func=Detail.as_view('edit'))
And this is my models.py:
import datetime
from flask import url_for
from pyReefLog import db
class Comment(db.EmbeddedDocument):
created_at = db.DateTimeField(default=datetime.datetime.now, required=True)
body = db.StringField(verbose_name="Comment", required=True)
author = db.StringField(verbose_name="Name", max_length=255, required=True)
class Measurement(db.Document):
created_at = db.DateTimeField(default=datetime.datetime.now, required=True)
measured_at = db.DateTimeField(default=datetime.datetime.now, required=True)
alkalinity = db.DecimalField(default=0.0, precision=2)
calcium = db.DecimalField(default=0.0, precision=2)
magnesium = db.DecimalField(default=0.0, precision=2)
ph = db.DecimalField(default=0.0, precision=2)
phosphate = db.DecimalField(default=0.0, precision=2)
salinity = db.DecimalField(default=0.0, precision=2)
temperature = db.DecimalField(default=0.0, precision=2)
creator = db.StringField(required=True, max_length=255)
comments = db.ListField(db.EmbeddedDocumentField('Comment'))
def get_absolute_url(self):
return url_for('measurement', kwargs={"creator": self.creator})
def __unicode__(self):
return self.creator
meta = {
'allow_inheritance': True,
'indexes': ['-created_at', '-measured_at', 'creator'],
'ordering': ['-measured_at']
}
None of the wtForms tutorial mention anything related to help_text attribute. Can anyone understand what is wrong there?
Edit:
As per comment #2 by user Jérôme, the current version (0.7.5 at the moment of this edit) of flask-mongoengine (and mongoengine 0.10.5) works straight out of the box. Tested and verified.
I'm doing the same tutorial and encountered that error too.
I added help_text="Your helptext here." to the fields (these were StringFields) in models.py and that solved the issue, but your error points to ObjectIdField, and that makes it a lot more puzzling.
So this isn't horribly helpful, but maybe it'll inspire you in the right direction.
Edit:
I wrestled with this for a while more, and turns out there's been a change in mongoengine that broke flask_mongoengine. This commit in flask_mongoengine in turn fixes that.
As for actual solutions, using a previous version of mongoengine (0.10.1) worked for me. So:
$ pip uninstall mongoengine
$ pip install mongoengine==0.10.1
这篇关于python wtf AttributeError：'ObjectIdField'对象没有属性'help_text'的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
