Issues with Pyramid and traversal

Question

When I tried to point my url to http://localhost:6543/admin/product/50b0d01ce815af3c4167040e/edit, somehow it shows a 404 error. I believe somewhere, my views is wrong, but I can't seem to find out what went wrong after numerous tries.

Contents of resources.py:

    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

Contents of views/admin.py:

    @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!'}

---

I've made some changes to the source code. http://localhost:6543/admin/product is definitely working. However, seems like now http://localhost:6543/admin/product/add isn't showing the layout nor is http://localhost:6543/admin/product/YYYY/edit showing the layout.

Contents of views/admin.py:

    @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>'}

Contents of resources.py:

    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

In my console, when I point my url to http://localhost:6543/admin/product/add, the output is:

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

However, it is showing a 404 error, so I'm guessing my views/admin.py is wrong somewhere? I've tried switching the order of the view_config around, but to no avail:

    @view_config(context='mycart:resources.ProductName', name='add',  ... )
    ....

    @view_config(context='mycart:resources.ProductName', name='edit',  ... ) 

As for when editing using the following url: http://localhost:6543/admin/vendor/50b0d01ce815af3c4167040e/edit, the console output is:

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

So I know that in my context, I should use context='mycart:resources.ProductName', and the name set it edit. However, it isn't showing the edit message in the console that I have set in the views/admin.py.

Where could I have gone wrong?

Answer 1

If you do if key == 'somefing' in __getitem__ it is sign that you don't need pure traversal. Use URLdispatch or Hybrid aproach.

ADDED:localhost:6543/admin/product/add shows not found, becoze you register 'add' view for ProductName, but from this path you get Product object, that have not view 'add' registred for it, thats why 404 not found