I followed Flask-MongoEngine tutorial and use the code below:
tag = Tag.objects.get_or_404(slug=tag_slug)
it raised an AttriubteError:
AttributeError: 'QuerySet' object has no attribute 'get_or_404'
my pip freeze:
mongoengine==0.11.0
pymongo==3.4.0
Flask==0.12
flask-mongoengine==0.8.2
Flask-WTF==0.14
Just remove mongoengine from your pip freeze and in model definition import Document from flask_mongoengine, not from mongoengine.
Try it like that tag = Tag.objects().get_or_404(slug=tag_slug)
You need to add BaseQuerySet as the "queryset_class"
WRONG:
import mongoengine
from mongoengine import Document
db = mongoengine
class Tag(db.Document):
field = db.StringField()
meta = { 'collection': 'tags' }
RIGHT:
import mongoengine
from flask_mongoengine import BaseQuerySet
from mongoengine import Document
db = mongoengine
class Tag(db.Document):
field = db.StringField()
meta = { 'collection': 'tags', 'queryset_class': BaseQuerySet}
Could you attach the Tag class to the model scheme?
Maybe you have an error in model file.
You could create a model file that includes a Tag class to test if the get_or_404 method works now.
model.py
from mongoengine import *
class Tag(Document):
slug = StringField()
name = StringField()
....
other attributes
And maybe now you can do it that:
def slug(tag_slug):
tag = Tag.objects.get_or_404(slug=tag_slug)
Try it and you tell us.
