Allow banner with no text. If so, details post text is used

boards/migrations/0038_auto_20151123_1203.py

@@ -0,0 +1,19 b''
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('boards', '0037_auto_20151122_2155'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='banner',
+            name='text',
+            field=models.TextField(null=True, blank=True),
+        ),
+    ]

boards/locale/ru/LC_MESSAGES/django.po

@@ -143,8 +143,8 b' msgid "This page does not exist"'
 msgstr "Этой страницы не существует"
 
 #: templates/boards/all_threads.html:35
-msgid "Related message"
-msgstr "Связанное сообщение"
+msgid "Details"
+msgstr "Подробности"
 
 #: templates/boards/all_threads.html:69
 msgid "Edit tag"

boards/models/banner.py

@@ -3,8 +3,11 b' from django.db import models'
 
 class Banner(models.Model):
     title = models.TextField()
-    text = models.TextField()
+    text = models.TextField(blank=True, null=True)
     post = models.ForeignKey('Post')
 
     def __str__(self):
         return self.title
+
+    def get_text(self) -> str:
+        return self.text or self.post.get_text()

boards/templates/boards/all_threads.html

@@ -31,8 +31,8 b''
     {% for banner in banners %}
         <div class="post">
             <div class="title">{{ banner.title }}</div>
-            <div>{{ banner.text }}</div>
-            <div>{% trans 'Related message' %}: <a href="{{ banner.post.get_absolute_url }}">>>{{ banner.post.id }}</a></div>
+            <div>{{ banner.get_text }}</div>
+            <div>{% trans 'Details' %}: <a href="{{ banner.post.get_absolute_url }}">>>{{ banner.post.id }}</a></div>
         </div>
     {% endfor %}