transform_and_dump.py

import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings")

import subprocess
import json

from gscapi.widgets.models import Widget

def main():
    qs = Widget.objects.all()
    cnt, total, data = 0, qs.count(),{}
    for w in qs:
        _input = {
            "type":w.type,
            "layout":w.layout,
            "style": w.style
        }

        pipe = subprocess.Popen(['node','convert.js'] ,
                                stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        pipe.stdin.write(json.dumps(_input))

        data[w.id] = json.loads(pipe.communicate()[0])        
        pipe.stdin.close()

        print "\t%s/%s" % (cnt, total)
        cnt+=1

    json.dump(data, open('widget-styles.json','w'))

main()    

update.py

import os
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "settings")

import subprocess
import json

from gscapi.widgets.models import Widget

def main():
    qs = Widget.objects.all()
    cnt, cnt_not_found, total, data = 0, 0, qs.count(),{}
    data = json.load(open('widget-styles.json'))


    for w in qs:
        new_style = data.get(str(w.id))
        if new_style is None:
            cnt_not_found += 1
            print '%s not found'%w.id
            continue

        w.style = new_style['style']
        w.save(update_fields = ['style'])

        cnt+=1
        print "\t%s/%s" % (cnt, total)

main()