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1
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3
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from django.conf import settings
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2
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3
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from django.urls import NoReverseMatch
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3
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4
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3
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from rest_framework.reverse import _reverse
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5
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3
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from rest_framework.versioning import URLPathVersioning as BaseVersioning
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6
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7
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8
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def drf_reverse(viewname, args=None, kwargs=None, request=None, format=None, **extra):
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9
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"""
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10
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Copy and monkey-patch `rest_framework.reverse.reverse` to prevent adding unwarranted
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11
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query string parameters.
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12
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"""
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13
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scheme = getattr(request, 'versioning_scheme', None)
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14
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if scheme is not None:
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15
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try:
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16
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url = scheme.reverse(viewname, args, kwargs, request, format, **extra)
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17
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0
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except NoReverseMatch:
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18
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# In case the versioning scheme reversal fails, fallback to the
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# default implementation
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20
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0
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url = _reverse(viewname, args, kwargs, request, format, **extra)
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else:
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22
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3
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url = _reverse(viewname, args, kwargs, request, format, **extra)
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return url
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26
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27
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3
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def get_request_version(request):
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28
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"""
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29
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The API version of a request as an integer i.e., 1 or 2
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"""
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version = settings.REST_FRAMEWORK['DEFAULT_VERSION']
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32
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if request and hasattr(request, 'version'):
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33
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version = request.version
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34
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3
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if version is None:
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35
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# For requests to /api/
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36
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return None
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37
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return int(version.lstrip('v'))
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38
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39
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40
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3
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def reverse(viewname, args=None, kwargs=None, request=None, format=None, **extra):
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41
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3
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if request is None or getattr(request, 'version', None) is None:
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# We need the "current request" to determine the correct version to
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43
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# prepend to reverse URLs. If there is no "current request", assume
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# the latest API version.
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45
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3
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if kwargs is None:
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46
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0
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kwargs = {}
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47
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3
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if 'version' not in kwargs:
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48
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0
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kwargs['version'] = settings.REST_FRAMEWORK['DEFAULT_VERSION']
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49
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3
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return drf_reverse(viewname, args, kwargs, request, format, **extra)
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50
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51
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52
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3
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class URLPathVersioning(BaseVersioning):
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53
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54
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3
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def reverse(self, viewname, args=None, kwargs=None, request=None, format=None, **extra):
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55
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if request.version is not None:
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56
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kwargs = {} if (kwargs is None) else kwargs
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57
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kwargs[self.version_param] = request.version
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58
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request = None
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59
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60
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3
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return super(BaseVersioning, self).reverse(
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61
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viewname, args, kwargs, request, format, **extra
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62
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)
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Pelt10