Python 金字塔和遍历的问题

当我试图将我的url指向

http://localhost:6543/admin/product/50b0d01ce815af3c4167040e/edit

，不知怎的，它显示了404错误。我相信在某个地方，我的观点是错误的，但经过无数次的尝试，我似乎无法找出哪里出了问题

resources.py的内容

：

    from pyramid.security import Authenticated
    from pyramid.security import Allow
    from pyramid.response import Response


    class Root(object):
        __name__ = ''
        __parent__ = None

        def __init__(self, request):
            pass

        def __getitem__(self, key):

            if key == 'admin_login':
               return Admin()

            elif key == 'admin':
               return Admin()

            raise KeyError


    class Admin(object):

        __name__ = ''
        __parent__ = Root
        __acl__ = [
          (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            pass

        def __getitem__(self, key):

            if key == 'product':
               print ('admin: ' , key)
               return Product()

            if key == 'category':
               print ('admin: ' + key)
               return Category()

            raise KeyError


    class Product(object):

        __name__ = ''
        __parent__ = Admin
        __acl__ = [
          (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            pass

        def __getitem__(self, key):
            if key :
               return ProductName(key)

            print ('Approaching KeyError: ', key)
            raise KeyError


    class ProductName(object):

        __parent__ = Product
        __acl__ = [
            (Allow, Authenticated, 'admin')
        ]

        def __init__(self, _str):
            self.__name__ = _str;
            self.__parent__ = Settings;

            print ('ProductName: ' + _str)
            pass

    @view_config(context='mycart:resources.Product', renderer='post.jinja2')
    @view_config(context='mycart:resources.ProductName', name='edit', renderer='admin/settings/commissions.jinja2', permission = 'admin')
        print (' in product edit? ')
        return {'msg': 'yay editing!'}

    @view_config(context='mycart:resources.ProductName', name='edit',    renderer='admin/product/test.jinja2', permission = 'admin')
    def product_edit(context, request):
        print 'edit here?'
        return { 'msg': '<div class="alert alert-success">Product Edit!</div>'}

    @view_config(context='mycart:resources.ProductName', name='add', renderer='admin/product/test.jinja2', permission = 'admin')
    def product_add(context, request):
        print 'add in here?'
        return { 'msg': '<div class="alert alert-success">Product Add</div>'}

    @view_config(context='mycart:resources.ProductName',  name="add" , request_method="POST", renderer='admin/product/add.jinja2', permission = 'admin')
    def product_add_post(context, request):
    return { 'msg': '<div class="alert alert-success">Product Added Successfully!</div>'}

    @view_config(context='mycart:resources.Product', name='', renderer='admin/product/list.jinja2', permission = 'admin')
    def product_list(context, request):

        return { 'msg': '<div class="alert alert-success">Listing of products</div>'}

    from pyramid.security import Authenticated
    from pyramid.security import Allow
    from pyramid.response import Response

    class Root(object):
        __name__ = __parent__ = None

        def __init__(self, request):
            pass

        def __getitem__(self, key):

            if key == 'admin_login':
                return Admin()

            elif key == 'admin':
                return Admin()

           raise KeyError


    class Admin(object):

        __name__ = ''
        __parent__ = Root
        __acl__ = [
            (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            pass

        def __getitem__(self, key):

            if key == 'product':
               return Product()

           #if key == 'category':
          #    return Category()

            raise KeyError

    class Product(object):
        __name__ = ''
        __parent__ = Admin
        __acl__ = [
            (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            print ('Product() self _name: ' , self.__name__, ' parent: ', self.__parent__)
            pass

        def __getitem__(self, key):
            print ('product: ' , key)

            if key:
                print ('key is true: ' , key)
                return ProductName(key)

            raise KeyError

     class ProductName(object):
        __name__ = ''
        __acl__ = [
           ( Allow, Authenticated, 'admin')
        ]

        def __init__(self, _key):
            p = Product()
            p.__name__ = _key
            p.__parent__ = self

            print ( 'ProductName() init: ', _key)
            print ( p.__parent__)
            print ( p.__name__)

            print ('\n\n')
            pass


        def __getitem__(self, _key):
            print ( 'ProductName() __get__item key: ', _key)

            if _key == 'edit':
                p = Product()
                p.__name__ = _key
                p.__parent__ = self
                print ('ProductName()->edit  parent: ')
                print ( p.__parent__)
                print ( p.__name__)
                print ('\n\n')
                return p

            raise KeyError

视图/admin.py的内容

：

    from pyramid.security import Authenticated
    from pyramid.security import Allow
    from pyramid.response import Response


    class Root(object):
        __name__ = ''
        __parent__ = None

        def __init__(self, request):
            pass

        def __getitem__(self, key):

            if key == 'admin_login':
               return Admin()

            elif key == 'admin':
               return Admin()

            raise KeyError


    class Admin(object):

        __name__ = ''
        __parent__ = Root
        __acl__ = [
          (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            pass

        def __getitem__(self, key):

            if key == 'product':
               print ('admin: ' , key)
               return Product()

            if key == 'category':
               print ('admin: ' + key)
               return Category()

            raise KeyError


    class Product(object):

        __name__ = ''
        __parent__ = Admin
        __acl__ = [
          (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            pass

        def __getitem__(self, key):
            if key :
               return ProductName(key)

            print ('Approaching KeyError: ', key)
            raise KeyError


    class ProductName(object):

        __parent__ = Product
        __acl__ = [
            (Allow, Authenticated, 'admin')
        ]

        def __init__(self, _str):
            self.__name__ = _str;
            self.__parent__ = Settings;

            print ('ProductName: ' + _str)
            pass

    @view_config(context='mycart:resources.Product', renderer='post.jinja2')
    @view_config(context='mycart:resources.ProductName', name='edit', renderer='admin/settings/commissions.jinja2', permission = 'admin')
        print (' in product edit? ')
        return {'msg': 'yay editing!'}

    @view_config(context='mycart:resources.ProductName', name='edit',    renderer='admin/product/test.jinja2', permission = 'admin')
    def product_edit(context, request):
        print 'edit here?'
        return { 'msg': '<div class="alert alert-success">Product Edit!</div>'}

    @view_config(context='mycart:resources.ProductName', name='add', renderer='admin/product/test.jinja2', permission = 'admin')
    def product_add(context, request):
        print 'add in here?'
        return { 'msg': '<div class="alert alert-success">Product Add</div>'}

    @view_config(context='mycart:resources.ProductName',  name="add" , request_method="POST", renderer='admin/product/add.jinja2', permission = 'admin')
    def product_add_post(context, request):
    return { 'msg': '<div class="alert alert-success">Product Added Successfully!</div>'}

    @view_config(context='mycart:resources.Product', name='', renderer='admin/product/list.jinja2', permission = 'admin')
    def product_list(context, request):

        return { 'msg': '<div class="alert alert-success">Listing of products</div>'}

    from pyramid.security import Authenticated
    from pyramid.security import Allow
    from pyramid.response import Response

    class Root(object):
        __name__ = __parent__ = None

        def __init__(self, request):
            pass

        def __getitem__(self, key):

            if key == 'admin_login':
                return Admin()

            elif key == 'admin':
                return Admin()

           raise KeyError


    class Admin(object):

        __name__ = ''
        __parent__ = Root
        __acl__ = [
            (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            pass

        def __getitem__(self, key):

            if key == 'product':
               return Product()

           #if key == 'category':
          #    return Category()

            raise KeyError

    class Product(object):
        __name__ = ''
        __parent__ = Admin
        __acl__ = [
            (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            print ('Product() self _name: ' , self.__name__, ' parent: ', self.__parent__)
            pass

        def __getitem__(self, key):
            print ('product: ' , key)

            if key:
                print ('key is true: ' , key)
                return ProductName(key)

            raise KeyError

     class ProductName(object):
        __name__ = ''
        __acl__ = [
           ( Allow, Authenticated, 'admin')
        ]

        def __init__(self, _key):
            p = Product()
            p.__name__ = _key
            p.__parent__ = self

            print ( 'ProductName() init: ', _key)
            print ( p.__parent__)
            print ( p.__name__)

            print ('\n\n')
            pass


        def __getitem__(self, _key):
            print ( 'ProductName() __get__item key: ', _key)

            if _key == 'edit':
                p = Product()
                p.__name__ = _key
                p.__parent__ = self
                print ('ProductName()->edit  parent: ')
                print ( p.__parent__)
                print ( p.__name__)
                print ('\n\n')
                return p

            raise KeyError

---

我对源代码做了一些修改<代码>http://localhost:6543/admin/product肯定在工作。然而，现在似乎

http://localhost:6543/admin/product/add

未显示布局，也未显示

http://localhost:6543/admin/product/YYYY/edit

显示布局

视图/admin.py的内容

：

    from pyramid.security import Authenticated
    from pyramid.security import Allow
    from pyramid.response import Response


    class Root(object):
        __name__ = ''
        __parent__ = None

        def __init__(self, request):
            pass

        def __getitem__(self, key):

            if key == 'admin_login':
               return Admin()

            elif key == 'admin':
               return Admin()

            raise KeyError


    class Admin(object):

        __name__ = ''
        __parent__ = Root
        __acl__ = [
          (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            pass

        def __getitem__(self, key):

            if key == 'product':
               print ('admin: ' , key)
               return Product()

            if key == 'category':
               print ('admin: ' + key)
               return Category()

            raise KeyError


    class Product(object):

        __name__ = ''
        __parent__ = Admin
        __acl__ = [
          (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            pass

        def __getitem__(self, key):
            if key :
               return ProductName(key)

            print ('Approaching KeyError: ', key)
            raise KeyError


    class ProductName(object):

        __parent__ = Product
        __acl__ = [
            (Allow, Authenticated, 'admin')
        ]

        def __init__(self, _str):
            self.__name__ = _str;
            self.__parent__ = Settings;

            print ('ProductName: ' + _str)
            pass

    @view_config(context='mycart:resources.Product', renderer='post.jinja2')
    @view_config(context='mycart:resources.ProductName', name='edit', renderer='admin/settings/commissions.jinja2', permission = 'admin')
        print (' in product edit? ')
        return {'msg': 'yay editing!'}

    @view_config(context='mycart:resources.ProductName', name='edit',    renderer='admin/product/test.jinja2', permission = 'admin')
    def product_edit(context, request):
        print 'edit here?'
        return { 'msg': '<div class="alert alert-success">Product Edit!</div>'}

    @view_config(context='mycart:resources.ProductName', name='add', renderer='admin/product/test.jinja2', permission = 'admin')
    def product_add(context, request):
        print 'add in here?'
        return { 'msg': '<div class="alert alert-success">Product Add</div>'}

    @view_config(context='mycart:resources.ProductName',  name="add" , request_method="POST", renderer='admin/product/add.jinja2', permission = 'admin')
    def product_add_post(context, request):
    return { 'msg': '<div class="alert alert-success">Product Added Successfully!</div>'}

    @view_config(context='mycart:resources.Product', name='', renderer='admin/product/list.jinja2', permission = 'admin')
    def product_list(context, request):

        return { 'msg': '<div class="alert alert-success">Listing of products</div>'}

    from pyramid.security import Authenticated
    from pyramid.security import Allow
    from pyramid.response import Response

    class Root(object):
        __name__ = __parent__ = None

        def __init__(self, request):
            pass

        def __getitem__(self, key):

            if key == 'admin_login':
                return Admin()

            elif key == 'admin':
                return Admin()

           raise KeyError


    class Admin(object):

        __name__ = ''
        __parent__ = Root
        __acl__ = [
            (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            pass

        def __getitem__(self, key):

            if key == 'product':
               return Product()

           #if key == 'category':
          #    return Category()

            raise KeyError

    class Product(object):
        __name__ = ''
        __parent__ = Admin
        __acl__ = [
            (Allow, Authenticated, 'admin')
        ]

        def __init__(self):
            print ('Product() self _name: ' , self.__name__, ' parent: ', self.__parent__)
            pass

        def __getitem__(self, key):
            print ('product: ' , key)

            if key:
                print ('key is true: ' , key)
                return ProductName(key)

            raise KeyError

     class ProductName(object):
        __name__ = ''
        __acl__ = [
           ( Allow, Authenticated, 'admin')
        ]

        def __init__(self, _key):
            p = Product()
            p.__name__ = _key
            p.__parent__ = self

            print ( 'ProductName() init: ', _key)
            print ( p.__parent__)
            print ( p.__name__)

            print ('\n\n')
            pass


        def __getitem__(self, _key):
            print ( 'ProductName() __get__item key: ', _key)

            if _key == 'edit':
                p = Product()
                p.__name__ = _key
                p.__parent__ = self
                print ('ProductName()->edit  parent: ')
                print ( p.__parent__)
                print ( p.__name__)
                print ('\n\n')
                return p

            raise KeyError

在我的控制台中，当我将url指向

http://localhost:6543/admin/product/add

，输出为：

    < mycart.resources.ProductName object at 0x10abb7990 >
    add

    < mycart.resources.ProductName object at 0x10abb4bd0 >
    edit

至于使用以下url进行编辑：

http://localhost:6543/admin/vendor/50b0d01ce815af3c4167040e/edit

，控制台输出为：

    < mycart.resources.ProductName object at 0x10abb7990 >
    add

    < mycart.resources.ProductName object at 0x10abb4bd0 >
    edit

编辑

因此，我知道在我的上下文中，我应该使用context='mycart:resources.ProductName'，并将其名称设置为edit。但是，它没有在控制台中显示我在

视图/admin.py

中设置的编辑消息

---

我哪里会出错

如果在

\uu getitem\uuu

中执行

If key==“somefing”

，则表明不需要纯遍历。 使用URLdispatch或混合aproach

---

添加：

localhost:6543/admin/product/add

显示未找到，因为您注册了ProductName的“添加”视图，但从该路径可以获得尚未注册“添加”视图的产品对象，这就是为什么404找不到

您的视图引用了

ProductName

，而您的

产品

资源我正在加载

设置名称

。这是复制/粘贴问题，还是您真正的问题？请注意，

\uuuu parent\uuuu

属性应该是实际的实例，而不是类。因此，您应该执行类似于

p=Product（）；p、 _u_父母_;=自己；返回p

。如果你不解决这个问题，你将在稍后发布另一个关于一个模糊错误的问题。哦，那应该是一个ProductName而不是SettingsName，我在这里发布后注意到了这个错误，忘记了编辑帖子。谢谢，我要再试一次。会不会有一个关于traversal+mongodb的dummy分步指南，教给那些没有python/pyramid背景的人一些像localhost:6543/admin/product/{arbitral_url}，localhost:6543/admin/settings/{arbitral_url}之类的东西？我试着四处看看，但大多数人都认为人们对pylon的了解很少。因此，对于父级，如果它应该是一个实际实例，如果url是localhost:6543/admin/product，在产品类（resources.py）中，父级应该=admin（），和productname parent=Product（）？但这是否解释了视图无法工作的原因？这纯粹是一个练习，让我了解遍历是如何工作的，即使终端显示了相关的消息shm。。。在终端控制台中，我得到了add，因此我认为上下文是ProductName而不是Product。尽管如此，我已经将上下文更改为Product，并添加了名称，但是没有，它仍然显示404关于所提出的第二个问题，关于0x10abb4bd0处的编辑。。。一直在尝试不同的方法，但不知怎么的，它没有呈现编辑视图哈，我明白了，只需要删除ProductName中的getitem，保持init不变并删除pass，感谢您的帮助