3245 datastore_active race condition

`datastore_create` directly updates database and solr index and
this reduces possibility of conflicts inside simultaneous calls

ckanext/datastore/logic/action.py

@@ -1,9 +1,10 @@
 import logging
+import json
 
 import pylons
 import sqlalchemy
 
-import ckan.lib.base as base
+import ckan.lib.search as search
 import ckan.lib.navl.dictization_functions
 import ckan.logic as logic
 import ckan.plugins as p
@@ -147,9 +148,47 @@ def datastore_create(context, data_dict):
         log.debug(
             'Setting datastore_active=True on resource {0}'.format(resource.id)
         )
-        p.toolkit.get_action('resource_patch')(
-            context,
-            {'id': data_dict['resource_id'], 'datastore_active': True})
+        # issue #3245: race condition
+        update_dict = {'datastore_active': True}
+
+        # get extras(for entity update) and package_id(for search index update)
+        res_query = model.Session.query(
+            model.resource_table.c.extras,
+            model.resource_table.c.package_id
+        ).filter(
+            model.Resource.id == data_dict['resource_id']
+        )
+        extras, package_id = res_query.one()
+
+        # update extras in database for record and its revision
+        extras.update(update_dict)
+        res_query.update({'extras': extras}, synchronize_session=False)
+
+        model.Session.query(model.resource_revision_table).filter(
+            model.ResourceRevision.id == data_dict['resource_id'],
+            model.ResourceRevision.current is True
+        ).update({'extras': extras}, synchronize_session=False)
+
+        model.Session.commit()
+
+        # get package with  updated resource from solr
+        # find changed resource, patch it and reindex package
+        psi = search.PackageSearchIndex()
+        solr_query = search.PackageSearchQuery()
+        q = {
+            'q': 'id:"{0}"'.format(package_id),
+            'fl': 'data_dict',
+            'wt': 'json',
+            'fq': 'site_id:"%s"' % config.get('ckan.site_id'),
+            'rows': 1
+        }
+        for record in solr_query.run(q)['results']:
+            solr_data_dict = json.loads(record['data_dict'])
+            for resource in solr_data_dict['resources']:
+                if resource['id'] == data_dict['resource_id']:
+                    resource.update(update_dict)
+                    psi.index_package(solr_data_dict)
+                    break
 
     result.pop('id', None)
     result.pop('private', None)