I have content types Topics and Pamphlets. Pamphlets are related to topics (e.g. a pamphlet called 'Mass in B minor' could be related to the topic 'music') using 'relations' field-type:

```
pamphlet:
   ...
   relations:
      topics:
         multiple: false
   ...

```

What I want is to list all the Music pamphlets. More exactly, I want to be able to display each topic, with a list of pamphlets related to that topic.

There's a function `record.related()` but it works the other way, that is, I can use it when I display a pamphlet to show that the pamphlet is related to Music; but I can't use it when I display the Music topic to list all the pamphlets that are related to music.

(The documentation says that relations are always bi-directional, but I can't see how.)

Suggestions welcomed.