Allow searching for drivers in booking admin list page

by denormalizing driver values from booking vehicles to booking model.

docker-compose.yml

@@ -23,7 +23,7 @@ services:
     restart: on-failure
 
   db:
-    image: postgres:latest
+    image: postgres:10.8
     volumes:
       - ./pgdata:/var/lib/postgresql/data
     environment:

opencabs/admin.py

@@ -143,7 +143,7 @@ class BookingAdmin(ExportMixin, admin.ModelAdmin):
     list_filter = ('booking_type', 'status', 'travel_date',
                    'created', 'payment_status', 'payment_method')
     search_fields = ('booking_id', 'customer_name', 'customer_mobile',
-                     'travel_date')
+                     'travel_date', 'drivers')
     readonly_fields = ('total_fare', 'payment_due', 'payment_done',
                        'payment_status', 'revenue',
                        'last_payment_date',)

opencabs/migrations/0028_booking_drivers.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.5 on 2019-05-28 13:55
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('opencabs', '0027_auto_20190210_1507'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='booking',
+            name='drivers',
+            field=models.CharField(blank=True, default='', max_length=500),
+        ),
+    ]

opencabs/models.py

@@ -254,6 +254,8 @@ class Booking(models.Model):
     created = models.DateTimeField(auto_now_add=True, blank=True)
     last_updated = models.DateTimeField(auto_now=True, blank=True)
 
+    drivers = models.CharField(max_length=500, default="", blank=True)
+
     def __str__(self):
         return self.booking_id
 
@@ -476,6 +478,13 @@ def request(self):
         self.save()
         self.send_trip_status_to_customer()
 
+    def update_drivers(self):
+        drivers = ""
+        for vehicle in self.bookingvehicle_set.all().select_related('driver'):
+            if vehicle.driver:
+                drivers += vehicle.driver.name
+        self.drivers = drivers
+        self.save()
 
 class BookingVehicle(models.Model):
     booking = models.ForeignKey(Booking)

opencabs/signals.py

@@ -3,10 +3,17 @@
 
 from finance.models import Payment
 
+from .models import BookingVehicle
+
 
 @receiver([post_save, post_delete], sender=Payment)
 def update_booking_payment_info(sender, instance, **kwargs):
     if instance.item_content_type.app_label == 'opencabs' and \
             instance.item_content_type.model == 'booking':
         if instance.item_object:
             instance.item_object.save()
+
+
+@receiver([post_save, post_delete], sender=BookingVehicle)
+def update_booking_drivers(sender, instance, **kwargs):
+    instance.booking.update_drivers()