py2.7
mongoengine 0.10.5
pop() 某些key时出现异常（同时更新3个key或以上）。不知原因。
from mongoengine import connect, Document
from mongoengine import StringField, DictField
connect('default-db')
class User(Document):
# name = StringField(max_length=50, default='') # 用户名
properties = DictField()
# User(properties={'show_1': True, 'show_2': True, 'show_3': True, 'show_4': True}).save()
u = User.objects.all().first()
if not u.properties:
u.properties = {}
print(u.properties)
show_1 = 1
show_2 = 1
show_3 = 0
show_4 = 1
def __fun(attr, name, d):
if attr:
d[name] = True
elif not attr and name in d:
d.pop(name) # error
# d[name] = False # ok
__fun(show_1, 'show_1', u.properties)
__fun(show_2, 'show_2', u.properties)
__fun(show_3, 'show_3', u.properties)
__fun(show_4, 'show_4', u.properties)
# u.properties['show_1'] = True
# u.properties['show_2'] = True
# u.properties['show_4'] = True
# u.properties.pop('show_3') # error
print(u.properties)
# mongoengine.errors.OperationError: Could not save document (Cannot update 'properties' and 'properties.show_2' at the same time)
u.save()
py3.5
mongoengine 0.11.0 正常
