in the user model you can add to_s method, then here you can just use column.user also in the views you will be able to use the object directly <%=post.user%>. The to_s method coverts the object to a string using some of the columns like this:
```
def to_s; full_name end
```
or the long syntax if you prefer:
```
def to_s
  full_name
end
```