added search to surveys in snippets

server/surveys/models.py

@@ -2,15 +2,21 @@ from django.contrib.auth import get_user_model
 from django.db import models
 from django.db.models import JSONField
 from wagtail.snippets.models import register_snippet
+from wagtail.search import index
 
 
 @register_snippet
-class Survey(models.Model):
+class Survey(models.Model, index.Indexed):
     title = models.CharField(max_length=255)
     module = models.ForeignKey('books.Module', related_name='surveys', on_delete=models.CASCADE, null=True,
                                blank=True)
     data = JSONField()
 
+    search_fields = [
+        index.SearchField('title', partial_match=True),
+        index.SearchField('module__meta_title', partial_match=True),
+    ]
+
     def __str__(self):
         return self.title