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dongzky
Inspiring
July 11, 2008
Question

date object validation

  • July 11, 2008
  • 3 replies
  • 602 views
Hi All,

I've been looking at date and decision functions but I can't seem to find one which will check if a certain value/variable is a date object or not. I can't use IsDate 'coz this will only check if a certain string can be converted to a date. What I mean is, example, I will know that a certain value is a date object if that value is returned by a Now() function or a CreateDate/CreateDateTime function. These functions will return date objects. But how do I check if a certain value is a date object or not?

Example: Now() returns a date object, so this is a date object. But if I manually input, say "2008-07-11", this is not a date object since I just input it as a string.

Thanks.
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    3 replies

    D
    dongzkyAuthor
    Inspiring
    July 11, 2008
    i want to check an object if it is a date object just as i want to check a variable if it is of float data type or not. Something like it.

    the isdate doesn't give me what i wanted since even if i input this as a string "2008-07-11", it still gives me true, Isdate just tests if that string can be converted to a date.

    scenario:
    if i manualy type "2008-07-11", this is just a string and not a date object.

    if i say createdate(2008,7,11), this is a date object.

    I hope I make sense on this. Thanks.
    D
    Dan_Bracuk
    Inspiring
    July 11, 2008
    quote:
    Originally posted by: dongzky
    i want to check an object if it is a date object just as i want to check a variable if it is of float data type or not. Something like it.

    the isdate doesn't give me what i wanted since even if i input this as a string "2008-07-11", it still gives me true, Isdate just tests if that string can be converted to a date.

    scenario:
    if i manualy type "2008-07-11", this is just a string and not a date object.

    if i say createdate(2008,7,11), this is a date object.

    I hope I make sense on this. Thanks.

    If you are talking about user inputs, they will never be valid date objects. They will be strings. What else did you want to test?
    D
    Dan_Bracuk
    Inspiring
    July 11, 2008
    IsDate() is pretty good except that the last time I tried it, it would return true on the occasional non date such as "Apr 31".

    In my apps, I only get data from user inputs (forms), or dbs. If I select a date field from a db, I don't have to check anything. Starting with CF7, the combination of masks and validate attributes in cfinput make it easy to prevent users from submitting anything that is not a date. I combine this with a couple of custom tags I wrote several years ago that use isDate().

    What scenario do you have that makes isDate inadequate?
    D
    Daverms
    Inspiring
    July 11, 2008
    Hi,

    Have you tried the "CheckPattern" udf?
    D
    dongzkyAuthor
    Inspiring
    July 11, 2008
    quote:
    Originally posted by: Daverms
    Hi,

    Have you tried the "CheckPattern" udf?


    I tried the udf, but still failed to give me the result I want. By the way, is the "isDate" checking there suppose to determine if it is a date object? It seems like it just looks for patterns. I'm not sure though. What I am trying to achieve is to validate a value/variable if it is a date object. Just like when you want to validate a variable if it is an integer data type, or maybe if it is a srting data type, or maybe it is a boolean data type, etc. Maybe there is a core java for this? But how? What function? Thanks.

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