[Rails] Add a "filter" on the ERB <%= ... %>

I have a site with a lot of view code like this:

<p>
<%=@post.user.name%>
</p>

Unfortunately a lot of old posts have had their users deleted, so the
code above breaks the entire view. I am working on a larger cleanup on
the code, but in the meantime I would like to make a quickfix to get the
views working.

What I would like is to convert

<%=@post.user.name%>

to

<%=(@post.user.name) rescue ''%>

Is there any way to override <%= to do the above? Thus fixing all errors
on the spot.

Thanks

- Carsten
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