Ruby on Rails

Hi all,

In my application all users have the ability to upload a profile picture
through a file field but it is not compulsory.

On my index page it displays all users along with their profile pictures
but not all users have a profile picture and therefore some users have
no image at all.

How would I go about getting a generic image to display for the rest of
the users.

I have the following section in the index:

<% for user in @users %>
<tbody>
<td align = "center"><%= image_tag user.photo.url, :height => 50,
:width => 50 %></td>
<td align = "center"><%= user.username %></td>
<td align = "center"><%= user.favourite_console %></td>
<td align = "center"><%= user.games.count %></td>
<td align = "center"><%= link_to "Show", user %></body>
</tbody>
<% end %>

For the following line I want to do something like this:

If user has photo
<td align = "center"><%= image_tag user.photo.url, :height =>
50, :width => 50 %></td>
else
display this photo
end

How would I go about doing this?

Thanks

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