两个使用Flask-Restful的变量Url [英] Two Variable Urls using Flask-Restful

问题描述

我正在写一个api，我想要一个网址看起来像这样：

 '/ api / v1.0 / restaurant / Name& Address'
  

使用Flask-restful，我将url定义为

<$ p $ < code>'/ api / v1.0 / restaurant /< name>&< address>'

Werkzeug不喜欢这个，但是在werkzeug / routing.py中引发了一个BuildError

当我使用add_resource定义url时，

 '/ api / v1.0 / restaurant /< name>'
  

和硬连线地址，一切正常。

如何定义网址取两个变量？

$ p
$ b $ $ p $ $ $ $ c> Traceback（最近调用最后一个）：
文件/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask/app .py，第1475行，在full_dispatch_request
rv = self.dispatch_request（）
文件/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask/ app.py，第1461行，在dispatch_request
返回self.view_functions [rule.endpoint]（** req.view_args）
文件/home/ubuntu/.virtualenvs/data/local/lib/ python2.7 / site-packages / flask_restful / __init__.py，第397行，在包装中
resp = resource（* args，** kwargs）
文件/home/ubuntu/.virtualenvs/data /local/lib/python2.7/site-packages/flask/views.py，第84行，在
返回self.dispatch_request（* args，** kwargs）
文件/ home / ubuntu / .virtualenvs / data / local / lib / python2.7 / site-packages / flask_restful / __init__.py，第487行，在dispatch_request
resp = meth（* args，** kwargs）
/ home / subuntu / Hotsauce / api / app / views.py，第75行， Ubuntu的/ .virtualenvs /数据/ local / lib目录/ python2.7 / site-packages中/flask_restful/__init__.py，第533行，编组
返回OrderedDict（items）
文件/usr/lib/python2.7/collections.py，第52行，在__init__
self .__ update（* args，** kwds）
文件/home/ubuntu/.virtualenvs/data/lib/python2.7/_abcoll.py，第547行，更新
，其他值如下：
在< genexpr>文件中的/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask_restful/__init__.py，第532行。
for k，v in fields.items（））
文件/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask_restful/fields.py，第232行，输出
o = urlparse（url_for（self.endpoint，_external = self.absolute，** data））
文件/home/ubuntu/.virtualenvs/data/local/lib/python2 .7 / site-packages / flask / helpers.py，第312行，在url_for
中返回appctx.app.handle_url_build_error（error，endpoint，values）
文件/home/ubuntu/.virtualenvs/ data / local / lib / python2.7 / site-packages / flask / app.py，第1641行，在handle_url_build_error
reraise（exc_type，exc_value，tb）
文件/ home / ubuntu / virtualenvs / data / local / lib / python2.7 / site-packages / flask / helpers.py，第305行，在url_for
force_external = external）
文件/home/ubuntu/.virtualenvs/ data / local / lib / python2.7 / site-packages / werkzeug / routing.py，第1620行，在build
引发BuildError（endpoint，values，method）
BuildError :('restaurant' {u'city_id'：2468，u'score ：Decimal（'0E-10'），'id'：37247，u'nbhd_id'：6596，u'address_region'：u'NY'，u'phone_number'：u'[phone]'，'_sa_instance_state '：< sqlalchemy.orm.state.InstanceState object at 0x26f33d0> ;, u'complete'：False，u'name'：u'Asya'，u'address_locality'：u'New York'，u'address_updated'：True ，u'street_address'：u'46 Henry St'}，None）

这里是相关的生成错误的代码：

  resto_fields = {
'id'：fields.Integer，
'名字'：fields.String，
'street_address'：fields.String，
'address_locality'：fields.String，
'address_region'：fields.String，
'score' ：fields.Float，
'phone_number'：fields.String，
'uri'：fields.Url（'restaurant'）
} 
 
 def get（self ，姓名，地址）：
 restaurant = session.query（Restaurant）.filter_by（name = name）。 filter_by（address = address）
 
 resto = {'restaurant'：marshal（restaurant，resto_fields）} 
 
 return resto 
  

解决方案

这与& &符号无关也没有使用多个URL参数。

您只能使用 resto_fields 输出字段映射中的条目您的端点;在 resto_fields 映射中，您没有地址条目，但您的 restaurant 端点需要它建立URL。

添加一个地址字段添加到您的输出字段，或使用路径中现有的字段之一。

This seems like something that would come up a lot, but I can't find any documentation on it.

I'm writing an api and I want urls to look like this:

'/api/v1.0/restaurant/Name&Address'

Using Flask-restful, I've defined the url as

'/api/v1.0/restaurant/<name>&<address>'

Werkzeug doesn't like this however and raises a BuildError in werkzeug/routing.py

When I define the url, with add_resource, as

'/api/v1.0/restaurant/<name>'

and hard-wire the address, everything works fine.

How do I define the urls to take two variables?

Edit

Traceback (most recent call last):
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask_restful/__init__.py", line 397, in wrapper
    resp = resource(*args, **kwargs)
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask/views.py", line 84, in view
    return self.dispatch_request(*args, **kwargs)
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask_restful/__init__.py", line 487, in dispatch_request
    resp = meth(*args, **kwargs)
  File "/home/ubuntu/Hotsauce/api/app/views.py", line 75, in get
    resto = {'restaurant': marshal(restaurant, resto_fields)}
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask_restful/__init__.py", line 533, in marshal
    return OrderedDict(items)
  File "/usr/lib/python2.7/collections.py", line 52, in __init__
    self.__update(*args, **kwds)
  File "/home/ubuntu/.virtualenvs/data/lib/python2.7/_abcoll.py", line 547, in update
    for key, value in other:
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask_restful/__init__.py", line 532, in <genexpr>
    for k, v in fields.items())
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask_restful/fields.py", line 232, in output
    o = urlparse(url_for(self.endpoint, _external = self.absolute, **data))
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask/helpers.py", line 312, in url_for
    return appctx.app.handle_url_build_error(error, endpoint, values)
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask/app.py", line 1641, in handle_url_build_error
    reraise(exc_type, exc_value, tb)
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/flask/helpers.py", line 305, in url_for
    force_external=external)
  File "/home/ubuntu/.virtualenvs/data/local/lib/python2.7/site-packages/werkzeug/routing.py", line 1620, in build
    raise BuildError(endpoint, values, method)
BuildError: ('restaurant', {u'city_id': 2468, u’score’: Decimal('0E-10'), 'id': 37247, u'nbhd_id': 6596, u'address_region': u'NY', u'phone_number': u'[phone]', '_sa_instance_state': <sqlalchemy.orm.state.InstanceState object at 0x26f33d0>, u'complete': False, u'name': u'Asya', u'address_locality': u'New York', u'address_updated': True, u'street_address': u'46 Henry St'}, None)

And here is the relevant code that generates the error:

resto_fields = {
    'id': fields.Integer,
    'name': fields.String,
    'street_address': fields.String,
    'address_locality': fields.String,
    'address_region': fields.String,
    ‘score’: fields.Float,
    'phone_number': fields.String,
    'uri': fields.Url('restaurant')
    }

def get(self, name, address):
    restaurant = session.query(Restaurant).filter_by(name=name).filter_by(address=address)

    resto = {'restaurant': marshal(restaurant, resto_fields)}

    return resto

解决方案

This has nothing to do with the & ampersand nor with with using more than one URL parameter.

You can only use entries from the resto_fields output fields mapping in your endpoint; you don't have an address entry in your resto_fields mapping, but your restaurant endpoint requires it to build the URL.

Add an address field to your output fields, or use one of the existing fields in the route.

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