Solved

Syntax for a regular_expression validation

Posted on 2003-10-22
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Last Modified: 2013-12-24
I need to validate a text field with a regular_expression.  I want to ensure that a user enters a time in the format HH:MM AM or HH:MM PM.

I thought I had the syntax correct...but it is not working correctly.

<cfinput type="text" validate="regular_expression" pattern="[0-9]{1,2}\:[0-9]{2}\s[AM|PM]" name="starttime" required="yes" message="Please enter a valid start time in the format HH:MM AM or HH:MM PM.">

Any suggestions?
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Question by:SherryG
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10 Comments
 
LVL 16

Expert Comment

by:_nn_
ID: 9600013
Wild guesses (I don't know CF, but I know regexps)

- ":" doesn't need to be escaped
- "(|)" instead of "[|]"

pattern="[0-9]{1,2}:[0-9]{2}\s(AM|PM|am|pm)"

Possibly, you'd like to prevent anything else in the expression

pattern="^[0-9]{1,2}:[0-9]{2}\s(AM|PM|am|pm)$"

HTH
0
 

Author Comment

by:SherryG
ID: 9600819
That partially works.

If I enter 1:00 I get the error indicating that I need to use the correct format, in which case I change it to 1:00 PM and it works fine.

If I enter 11:00 it goes directly into the DB without an error.  I need the user to be prompted to enter the AM or PM if they forget.  For some reason, the code is not catching that error.

Any suggestions.
0
 

Author Comment

by:SherryG
ID: 9600820
That partially works.

If I enter 1:00 I get the error indicating that I need to use the correct format, in which case I change it to 1:00 PM and it works fine.

If I enter 11:00 it goes directly into the DB without an error.  I need the user to be prompted to enter the AM or PM if they forget.  For some reason, the code is not catching that error.

Any suggestions.
0
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Author Comment

by:SherryG
ID: 9600821
That partially works.

If I enter 1:00 I get the error indicating that I need to use the correct format, in which case I change it to 1:00 PM and it works fine.

If I enter 11:00 it goes directly into the DB without an error.  I need the user to be prompted to enter the AM or PM if they forget.  For some reason, the code is not catching that error.

Any suggestions.
0
 
LVL 2

Expert Comment

by:jonnygo55
ID: 9601728
ignore this if it not an option but why dont you create a little dropdown with AM and PM and add the 12 hours accordingly on the server side...
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LVL 16

Accepted Solution

by:
_nn_ earned 50 total points
ID: 9605555
Hmm, strange. I've just finished testing following one in javascript and it works ok for my IE6 :

pattern="^\d{1,2}:\d\d\s(AM|PM|am|pm)$"

HTH
0
 

Author Comment

by:SherryG
ID: 9606823
Thanks HTH.  There was a problem on my page.  Once I resolved it your code worked perfectly.
0
 
LVL 16

Expert Comment

by:_nn_
ID: 9606900
Thanks and glad I could help a it.

PS: For future reference, HTH is not my name, it's an acronym and stands for "Hope This Helps" or "Hope That Helps" :)
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Author Comment

by:SherryG
ID: 9606911
Sorry about that...I just assumed they were your initials!
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LVL 16

Expert Comment

by:_nn_
ID: 9606936
>> Sorry about that...I just assumed they were your initials!

Your assumption was perfectly normal and I should be the one apologizing for being a lazy typer :)
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