python - 从 API 调用返回的 XML 中分配变量

Question

我需要从 API 中提取一些数据。它以 XML 形式返回 GET，我在尝试弄清楚如何将 API 中的一些数据分配到 django/python 模型中的字段时遇到了一些问题。

activeCollab 的 API 不允许我创建自己的项目 ID 编号，它会自动为我生成该编号。所以我想获取该数字，然后将其分配给我的项目模型中的 API_id 字段。有人可以帮助我弄清楚如何获取 GET 返回的 XML 并将其分配给我的字段之一。

项目的 ActiveCollab API 文档: http://www.activecollab.com/docs/manuals/developers/api/projects

这是我的 models.py

class Project(models.Model):
client = models.ForeignKey(Clients, related_name='projects')
created_by = models.ForeignKey(User, related_name='created_by')


#general information
API_id = models.IntegerField(max_length=10, verbose_name='aC ProjectID', null=True, blank=True)
proj_name = models.CharField(max_length=255, verbose_name='Project Name')
pre_quote = models.CharField(max_length=3)
quote = models.IntegerField(max_length=10, verbose_name='Quote #', unique=True)
estimator = models.ForeignKey(User, related_name='Estimator', null=True)
desc = models.TextField(verbose_name='Description', null=True, blank=True)
starts_on = models.DateField(verbose_name='Start Date')
due_date = models.DateField(verbose_name='Due Date', null=True, blank=True)
completed_on = models.DateField(verbose_name='Finished On', null=True, blank=True)
notes = models.TextField(verbose_name='Notes', null=True, blank=True)

View .py

def addProject(request):
if request.method == 'POST':
    form = AddSingleProjectForm(request.POST)
    if form.is_valid():
        project = form.save(commit=False)
        project.created_by = request.user 
        today = datetime.date.today()
        project.pre_quote = "%s-" % (str(today.year)[2:4])
        project.quote = Project.objects.latest().quote+1
        project.save()

        project.status.create(
                value = form.cleaned_data.get('status', None)
        )            

        #API activeCollab
        params = urllib.urlencode({
              'format':'xml',
              'submitted':'submitted',
              'project[name]': project.proj_name,
              'project[overview]': project.desc,
              'project[starts_on]': project.starts_on,
              'project[leader_id]': 10,
        })
        req = urllib2.Request("web_url/public/api.php?path_info=/projects/add&token=####################", params)
        f = urllib2.urlopen(req)
        print f.read()


        return HttpResponseRedirect('/project/')
else:
    form = AddSingleProjectForm()

return render_to_response('project/addProject.html', {
'form': form, 'user':request.user}, context_instance=RequestContext(request))

如有任何建议，我们将不胜感激。

史蒂夫

诗。我展示的 api 调用是创建一个新项目

Answer 1

查看了您发布的链接...类似的内容可能会帮助您开始使用 lxml 和 xpath:

>>> from lxml import etree
>>> doc = etree.XML("""<projects>
...   <project>
...     <id>1</id>
...     <name>
...       <![CDATA[First Project]]>
...     </name>
...     <overview>
...       <![CDATA[<p>This is overview of the first project</p>]]>
...     </overview>
...     <status>
...       <![CDATA[active]]>
...     </status>
...     <type>...</type>
...     <permalink>...</permalink>
...     <leader_id>...</leader_id>
...     <company_id>...</company_id>
...     <group_id>...</group_id>
...   </project>
... </projects>""")
>>> data = {}
>>> for a in doc.xpath('/projects/project/*'):
...   data[a.tag] = str(a.text).strip()
...
>>> data
{'company_id': '...',
 'group_id': '...',
 'id': '1',
 'leader_id': '...',
 'name': 'First Project',
 'overview': '<p>This is overview of the first project</p>',
 'permalink': '...',
 'status': 'active',
 'type': '...'}

<小时/>

更新

稍微更明确的帮助:

假设您的文件中有一个 from lxml import etree 。这是 addProject 函数的代码片段:

req = urllib2.Request("web_url/public/api.php?path_info=/projects/add&token=####################", params)
resp = urllib2.urlopen(req)
resp_data = f.read()
if not resp.code == 200 and resp.headers.get('content-type') == 'text/xml':
  # Do your error handling.
  raise Exception('Unexpected response',req,resp)
data = etree.XML(resp_data)
api_id = int(data.xpath('/project/id/text()')[0])
project.API_id = api_id
project.save()