Merge branch '16-fix-the-path-for-organization-logo' into 'master'

Resolve "Fix the path for organization logo"

Closes #16

See merge request !5

picampaign/organization/serializers.py

-from picampaign.organization.models import FeedbackCategory, Group, GroupType, Organization
+from django.contrib.sites.shortcuts import get_current_site
 from rest_framework import serializers
 
+from picampaign.organization.models import FeedbackCategory, Group, GroupType, Organization
+
 
 class CategorySerializer(serializers.ModelSerializer):
 
@@ -24,6 +26,12 @@ class GroupTypeSerializer(serializers.ModelSerializer):
 
 
 class OrganizationSerializer(serializers.ModelSerializer):
+    logo = serializers.SerializerMethodField()
     class Meta:
         model = Organization
         fields = ('id', 'name', 'description', 'website', 'logo',)
+
+    def get_logo(self, obj):
+        if obj.logo:
+            return get_current_site + obj.logo.url
+        return None