web finches updates

webfinches.py

#From models.py
shpTypeDict = {
			"0":"Null Shape", 	
			"1":"Point", 	
			"3":"Polyline", 	
			"5":"Polygon", 	
			"8":"MultiPoint", 	
			"11":"PointZ", 	
			"13":"PolylineZ", 	
			"15":"PolygonZ", 	
			"18":"MultiPointZ", 	
			"21":"PointM", 	
			"23":"PolylineM", 	
			"25":"PolygonM", 	
			"28":"MultiPointM", 	
			"31":"MultiPatch"
					} 	

class DataFile(Dated):
    """Data files represent individual file uploads.
    They are used to construct DataLayers.
    """
    file = models.FileField(upload_to=get_upload_path)
    upload = models.ForeignKey('UploadEvent', null=True, blank=True)
    def get_upload_path(self, filename):
        return 'uploads/%s/%s' % (self.upload.user.username, filename)
    def __unicode__(self):
        return "DataFile: %s" % self.file.url
    def get_layer_data(self):
        data = {}
        f = self.file
        zip_file = zipfile.ZipFile(f)
        contents = zip_file.namelist()
        proj = [n for n in contents if '.prj' in n]
        if proj:
            # guess the srs
            proj_text = zip_file.open( proj[0] ).read()
            data['notes'] = proj_text
            data['srs'] = '' 
        else:  
            data['srs'] = ''
        # give a default name and geometry type
        basename = os.path.splitext(contents[0])[0]
        extract = zip_file.extractall()
        shp = shapefile.Reader(basename).shapes()
        geometry_type = shpTypeDict[str(shp[3].shapeType)]
        data['name'] = basename
        data['geometry_type'] = geometry_type
        f.close()
        return data

#From views.py
@login_required
def review(request):
    """A view for uploading new data.
    """
					
    user=User.objects.get(username='carlos')
    if request.method == 'POST': # someone is giving us data
        formset = LayerReviewFormSet(request.POST)
        if formset.is_valid():
        		for form in formset:
        				srs = form.cleaned_data['srs']
        				layer = DataLayer(srs = srs)	
        				layer = form.save(commit=False)
        				
        				
        				layer.save() #keep getting errors here... null value in column "author_id" violates not-null constraint
    else: # we are asking them to review data
        # get the last upload of this user
        upload = UploadEvent.objects.filter(user=user).order_by('-date')[0]
        data_files = DataFile.objects.filter(upload=upload)   
        layer_data = [ f.get_layer_data() for f in data_files ]
        formset = LayerReviewFormSet( initial=layer_data )

It would be a bit simpler to just use the gdal api built into django for reading the shapefiles:

Also, you'll might need to add a line above layer.save that says somethiing to the effect of:

layer.author = request.user