Correctly get short body

Pipfile

@@ -15,6 +15,7 @@ whitenoise = "*"
 waitress = "*"
 wagtail-markdown = "*"
 wagtail-metadata = "*"
+"bs4" = "*"
 
 [dev-packages]
 mypy = "*"

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "5ffa0692528697679dcd7085a5f33c448b989d70f53afa989c7a6a213377fc3e"
+            "sha256": "6398b48732255dbfe41aeaace62f3f4e09fd282f2521716bdb43d388cee0e928"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -31,6 +31,13 @@
             ],
             "version": "==2.1.3"
         },
+        "bs4": {
+            "hashes": [
+                "sha256:36ecea1fd7cc5c0c6e4a1ff075df26d50da647b75376626cc186e2212886dd3a"
+            ],
+            "index": "pypi",
+            "version": "==0.0.1"
+        },
         "certifi": {
             "hashes": [
                 "sha256:13e698f54293db9f89122b0581843a782ad0934a4fe0172d2a980ba77fc61bb7",

project/common/models.py

@@ -3,6 +3,10 @@ from django.db import models
 from wagtail.admin.edit_handlers import FieldPanel, MultiFieldPanel
 from wagtail.images.edit_handlers import ImageChooserPanel
 from wagtailmetadata.models import MetadataPageMixin
+from bs4 import BeautifulSoup
+
+
+SHORT_BODY_LENGTH = 30
 
 
 class Entity(MetadataPageMixin, Page):
@@ -30,7 +34,9 @@ class Entity(MetadataPageMixin, Page):
         return self.search_description
 
     def get_short_body(self):
-        return "Short body"
+        body_words = BeautifulSoup(str(self.body), 'html5lib').get_text().split(' ')
+        ending = '...' if len(body_words) > SHORT_BODY_LENGTH else ''
+        return ' '.join(body_words[:SHORT_BODY_LENGTH]) + ending # limit to 30 words (ish)
 
     class Meta:
         abstract = True