old_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  import json
  from os.path import join
  
  from django.db import models, migrations
  from django.conf import settings
  
  from loadmapping.models import LVFVerb
  
  def import_verbs(apps, schema_editor):
      LVFVerb = apps.get_model('loadmapping', 'LVFVerb')
      with open(join(settings.SITE_ROOT, 'loadmapping/fixtures/lvfverb.json')) as fixture:
              for entry in json.loads(fixture.read()):
                  assert entry['model'] == 'loadmapping.lvfverb'
                  fields = entry['fields']
                  LVFVerb(
                      lemma=fields['lemma'],
                      sense=fields['sense'],
                      lvf_class=fields['lvf_class'],
                      construction=fields['construction']).save()
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('loadmapping', '0001_initial'),
      ]
  
      operations = [
          migrations.RunPython(import_verbs)
      ]
  
new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  import json
  from os.path import join
  
  from django.db import models, migrations
  from django.conf import settings
  
  from loadmapping.models import LVFVerb
  
  def import_verbs(apps, schema_editor):
      LVFVerb = apps.get_model('loadmapping', 'LVFVerb')
      LVFVerb.objects.all().delete()
      with open(join(settings.SITE_ROOT, 'loadmapping/fixtures/lvfverb.json')) as fixture:
              for entry in json.loads(fixture.read()):
                  assert entry['model'] == 'loadmapping.lvfverb'
                  fields = entry['fields']
                  LVFVerb(
                      lemma=fields['lemma'],
                      sense=fields['sense'],
                      lvf_class=fields['lvf_class'],
                      construction=fields['construction']).save()
  
  def delete_verbs(apps, schema_editor):
      LVFVerb = apps.get_model('loadmapping', 'LVFVerb')
      LVFVerb.objects.all().delete()
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('loadmapping', '0001_initial'),
      ]
  
      operations = [
          migrations.RunPython(import_verbs, delete_verbs)
      ]
  
subject: Allow to reverse LVFVerb migration