Solved

checking nil object

Posted on 2007-11-15
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Last Modified: 2012-06-21
hi,

I am wondering if there is smart/elegant ways of checking nil object.

I have this in controller:

 @attending_ip = AttendingIp.find_by_sql("SELECT .....")

In view:

<% if @attending_ip != nil%>
<% @attending_ip.each do |u|  %>
...
...

<%if u.admit_date != nil%><%= u.admit_date.to_formatted_s(:my_format_0)  %><%end%>

...
...

I am checking  whether u.admit_date is nil otherwise, it throws error message since admit_date can be null. So, do I always have to check for all the columns? Are there better ways of doing this?

thx,
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Question by:dkim18
2 Comments
 
LVL 19

Accepted Solution

by:
peh803 earned 350 total points
ID: 20294959
With ruby, there is always a better way :-)

Try this...just a little bit cleaner.

Regards,
Phil
<%= u.admit_date.to_formatted_s(:my_format_0) if u.admit_date %>

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Author Closing Comment

by:dkim18
ID: 31409416
Ok, that is good enough. thx!
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