Тип web2py 'exceptions.AttributeError'

Question

view
#show.html
{{extend 'layout.html'}}
<h1>{{=page.title}}</h1>
[ {{=A('edit', _href=URL('edit', args=request.args))}} ]<br />
{{=MARKMIN(page.body)}}
<h2>Comments</h2>
{{for post in comments:}}
  <p>{{=db.auth_user[post.created_by].first_name}} on {{=post.created_on}}
     says <i>{{=post.body}}</i></p>
{{pass}}
<h2>Post a comment</h2>
{{=form}}

#controller
#default.py
def user():
    return dict(form=auth())
@auth.requires_login()
def index():
    pages = db().select(db.course.id,db.course.title,db.course.Instructor,orderby=db.course.title)
    return dict(pages=pages)
@auth.requires_login()
def createcourse():
     """creates a new empty wiki page"""
     form = SQLFORM(db.course).process(next=URL('index'))
     return dict(form=form)
def show():
     """shows a wiki page"""
     this_page = db.course(request.args(0,cast=int)) or redirect(URL('index'))
     db.post.course_id.default = this_page.id
     form = SQLFORM(db.post).process() if auth.user else None
     pagecomments = db(db.post.course_id==this_page.id).select()
     return dict(page=this_page, comments=pagecomments, form=form)

#model
#db.py
db = DAL("sqlite://storage.sqlite")
from gluon.tools import Auth
auth = Auth(db)
auth.define_tables(username=True)
db.define_table('course',
   Field('title', unique=True),
   Field('Instructor','text', unique=True),
   Field('Dateofcoursecreation','datetime'),
                Field('Courseid'),
   format = '%(title)s')

db.define_table('post',
    Field('course_id'),
    Field('body', 'text'),
    Field('created_on', 'datetime', default=request.now),
    Field('created_by', 'reference auth_user', default=auth.user_id))

#ticket issued

Error ticket for "courseapp"
Ticket ID

127.0.0.1.2016-03-16.20-55-17.d72cc1b2-28ab-4aea-be40-a372034830a5
<type 'exceptions.AttributeError'>
Version
web2py™     Version 2.13.4-stable+timestamp.2015.12.26.04.59.39
Python  Python 2.7.6: /usr/bin/python (prefix: /usr)
Traceback

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Traceback (most recent call last):
  File "/home/nikhil/Downloads/web2py/gluon/restricted.py", line 227, in restricted
    exec ccode in environment
  File "/home/nikhil/Downloads/web2py/applications/courseapp/views/default/show.html", line 79, in <module>
  File "/home/nikhil/Downloads/web2py/gluon/packages/dal/pydal/objects.py", line 90, in __getattr__
    raise AttributeError
AttributeError

Error snapshot help

<type 'exceptions.AttributeError'>()

inspect attributes
Frames

    File /home/nikhil/Downloads/web2py/gluon/restricted.py in restricted at line 227 code arguments variables

    File /home/nikhil/Downloads/web2py/applications/courseapp/views/default/show.html in <module> at line 79 code arguments variables

    File /home/nikhil/Downloads/web2py/gluon/packages/dal/pydal/objects.py in __getattr__ at line 90 code arguments variables
    Function argument list

    (self=<Row {'title': 'maths', 'Dateofcoursecreation': ... 'Instructor': 'indranil chakrabarty', 'id': 1L}>, k='body')
    Code listing

    85.
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        def __getattr__(self, k):
            try:
                return self.__getitem__(k)
            except KeyError:
                raise AttributeError


        def __copy__(self):
            return Row(self)

    Variables
    builtinAttributeError   <type 'exceptions.AttributeError'>

Пожалуйста, кто-нибудь может сказать, где ошибка?

Answer 1

{{=MARKMIN(page.body)}} относится к атрибуту под названием body, которого нет на столе: course, Это причина, по которой вы видите ошибку.