使用遍历在 Pyramid 中构建 REST API

Question

我正在尝试使用 Python 金字塔框架构建一个简单的 REST API。当我嵌套 classes 时，我无法执行可调用视图。 (webkey class inside the auth class)

我这样定义我的资源

from __future__ import absolute_import
from pyramid.traversal import find_root

import logging
log = logging.getLogger(__name__)


class Resource(dict):
    def __init__(self, ref, parent):
        self.__name__ = ref
        self.__parent__ = parent

    def __repr__(self):
        # use standard object representation (not dict's)
        return object.__repr__(self)

    def add_child(self, ref, klass):
        resource = klass(ref=ref, parent=self)
        self[ref] = resource

class Root(Resource):
    def __init__(self, request):
        Resource.__init__(self, ref='', parent=None)
        self.request = request
        self.add_child('auth', auth)
        self['auth'].add_child('webkey', webkey)

class auth(Resource):
    def __init__(self, ref, parent):
        self.__name__ = ref
        self.__parent__ = parent            

    def collection(self):
        root = find_root(self)
        request = root.request
        return request.db[self.collection_name]

    def retrieve(self):
        return [elem for elem in self.collection.find()]

    def create(self, document):
        object_id = self.collection.insert(document)

        return self.resource_name(ref=str(object_id), parent=self)

    def __getitem__(self, ref):
        return auth(ref, self)

    def getDesc(self):
        return 'Base authentication class'

class webkey(Resource):

    def __init__(self, ref, parent):
        self.__name__ = ref
        self.__parent__ = parent

    def collection(self):
        root = find_root(self)
        request = root.request
        return request.db[self.collection_name]

    def retrieve(self):
        return [elem for elem in self.collection.find()]

    def create(self, document):
        object_id = self.collection.insert(document)

        return self.resource_name(ref=str(object_id), parent=self)

    def __getitem__(self, ref):
        return webkey(ref, self)

    def getDesc(self):
        return 'Web key authentication class'

我的观点是

from pyramid.view import view_config

from patientapi.resources.resources import Root, auth, webkey

import logging
log = logging.getLogger(__name__)

@view_config(renderer='json', context=Root)
def home(context, request):
    return {'info': 'DigiDoc API'}

@view_config(renderer='json', context=auth)
def getbasic(context, request):
    return {'AuthModule': context.getDesc()}

@view_config(renderer='json', context=webkey)
def getweb(context, request):
    return {'WEBAuthModule': context.getDesc()}

初始化也很基础

def main(global_config, **settings):
    """ This function returns a Pyramid WSGI application.
    """
    config = Configurator(settings=settings, root_factory=Root)

    config.scan('.views')
    return config.make_wsgi_app()

当我使用 curl localhost:6543/auth/webkey 获取 webkey URI 时执行可调用的 getBasic 视图。我想弄清楚为什么 getWeb 视图可调用未执行。我在资源脚本中以错误的方式嵌套了 classes 吗？当我在 pshell 中查看字典结构时，它看起来像这样：

    print(root.keys())
    dict_keys(['auth'])
    print(root['auth'].keys())
    dict_keys(['webkey'])
    print(root['auth']['webkey'].keys())
    dict_keys([])

Answer 1

在查找操作中 class auth 每次 returns 一个新的自身实例，这就是为什么 getweb 视图从未被调用的原因。

class auth(Resource):
    ...
    def __getitem__(self, ref):
        # it always returns a new instance of auth class, 
        # and that is why context will always by `auth`
        return auth(ref, self)
    ...

同时在查找操作中创建 class 的新实例感觉不对。 Pyramid's traversal tutorial has very nice and simple examples of how to build a traversal application. For complex examples I would recommend to check Kotti source code.

使用遍历在 Pyramid 中构建 REST API

Building a REST API in Pyramid using traversal

python

pyramid