Adding migration for edoardo milotti to cwb pipeline

gracedb/migrations/guardian/0008_add_edoardo_milotti_to_cwb.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.5 on 2017-11-01 16:19
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+# Creates UserObjectPermission objects which allow specific users
+# to add events for pipelines.  Based on current production database
+# content (27 October 2017)
+
+# List of pipeline names and lists of usernames who should
+# be allowed to add events for them
+PP_LIST = [
+    {
+        'pipeline': 'cwb',
+        'usernames': [
+            'edoardo.milotti@ligo.org',
+        ]
+    },
+]
+
+def add_permissions(apps, schema_editor):
+    User = apps.get_model('auth', 'User')
+    Permission = apps.get_model('auth', 'Permission')
+    UserObjectPermission = apps.get_model('guardian', 'UserObjectPermission')
+    Pipeline = apps.get_model('events', 'Pipeline')
+    ContentType = apps.get_model('contenttypes', 'ContentType')
+
+    perm = Permission.objects.get(codename='populate_pipeline')
+    ctype = ContentType.objects.get_for_model(Pipeline)
+    for pp_dict in PP_LIST:
+        pipeline = Pipeline.objects.get(name=pp_dict['pipeline'])
+
+        # Loop over users
+        for username in pp_dict['usernames']:
+
+            # Robot users should have been already created by ligoauth 0003,
+            # but we have to create human user accounts here
+            user, _ = User.objects.get_or_create(username=username)
+
+            # Create UserObjectPermission
+            uop, uop_created = UserObjectPermission.objects.get_or_create(
+                user=user, permission=perm, content_type=ctype,
+                object_pk=pipeline.id)
+
+def remove_permissions(apps, schema_editor):
+    pass
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('guardian', '0007_add_gareth_davies_to_pycbc'),
+    ]
+
+    operations = [
+        migrations.RunPython(add_permissions, remove_permissions),
+    ]
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