feat: List popular event locations at /event-locations

app/api/event_locations.py

@@ -1,17 +1,45 @@
 from flask_rest_jsonapi import ResourceList
+from flask_rest_jsonapi.querystring import QueryStringManager as QSManager
+from flask_rest_jsonapi.pagination import add_pagination_links
 
+from flask import request, url_for
 from app.api.bootstrap import api
 from app.api.schema.event_locations import EventLocationSchema
 from app.models import db
+from app.models.event import Event
 from app.models.event_location import EventLocation
+from sqlalchemy import func, desc
 
 
 class EventLocationList(ResourceList):
 
     """
     List event locations
     """
+    def get(self, *args, **kwargs):
+        qs = QSManager(request.args, self.schema)
+        popular_locations = db.session.query(Event.searchable_location_name, func.count(Event.id).label('counts')) \
+            .group_by(Event.searchable_location_name) \
+            .order_by(desc('counts')) \
+            .limit(6)
+        locations = []
+        for location, _ in popular_locations:
+            if location is not None:
+                new_location = EventLocation(location)
+                new_location.id = len(locations)
+                locations.append(new_location)
+        schema = EventLocationSchema()
+        result = schema.dump(locations, many=True).data
+        view_kwargs = request.view_args if getattr(self, 'view_kwargs', None) is True else dict()
+        add_pagination_links(result,
+                             len(locations),
+                             qs,
+                             url_for(self.view, **view_kwargs))
+        result.update({'meta': {'count': len(locations)}})
+        return result
+
     decorators = (api.has_permission('is_admin', methods="POST"),)
     schema = EventLocationSchema
     data_layer = {'session': db.session,
-                  'model': EventLocation}
+                  'model': EventLocation
+                  }