Revision b6bc4afa snf-django-lib/snf_django/lib/api/utils.py

b/snf-django-lib/snf_django/lib/api/utils.py
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import datetime
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from dateutil.parser import parse as date_parse
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from django.utils import simplejson as json
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from django.http import HttpResponse
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from django.conf import settings


  		





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from snf_django.lib.api import faults


  		





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        prefix += '/'


  		





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    pattern = '^' + prefix


  		





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    return pattern


  		





  
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def filter_modified_since(request, objects):


  		





  
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    """Filter DB objects based on 'changes-since' request parameter.


  		





  
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    Parse request for 'changes-since' parameter and get only the DB objects


  		





  
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    that have been updated after that time. Otherwise, return the non-deleted


  		





  
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    objects.


  		





  
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    """


  		





  
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    since = isoparse(request.GET.get("changes-since"))


  		





  
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    if since:


  		





  
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        modified_objs = objects.filter(updated__gte=since)


  		





  
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        if not modified_objs:


  		





  
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            return HttpResponse(status=304)


  		





  
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        return modified_objs


  		





  
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    else:


  		





  
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        return objects.filter(deleted=False)


  		












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