``` form st dob = 04052016 writedump isValid date form st do

Question

``` form st dob = 04052016 writedump isValid date form st dob writedump isDate form st dob writedump dateDiff d now form st dob writedump now diff d form st dob ``` make this make sense these kind of inconsistencies are nuts

sknowlton · Answer

works on Lucee interesting

sknowlton · Answer

tbh I d rather fewer things pass as valid dates whether with isValid or isDate seems like CFML is super eager to want to accept something as a date

sknowlton · Answer

making your date value `452016` causes Lucee to return `true` for isValid and `false` for isDate

websolete · Answer

<http form st|form st> dob is a string and it should be incumbent on you to validate that the string representation is valid before doing any date stuff with it imo i d treat it like a string and validate against regexes before testing with the bif for the reasons you re seeing

Dave Merrill · Answer

Practically speaking I agree but that said wth with the bif A validation function that requires you to validate the data before using it has missed the point IMO

websolete · Answer

i don t disagree date validation has been sketchy with cf for a long time not sure what to say

Adam Cameron · Answer

I think there s a point being missed here

Adam Cameron · Answer

This works ```dateDiff d now form st dob ``` This doesn t ```now diff d form st dob ``` They should be analogous

websolete · Answer

guess i missed that yeah that s a very good point i like the way you comb your hair around it

Adam Cameron · Answer

It s not to do with string date ambiguity It s to do with CF being shite

Adam Cameron · Answer

< Mark Takata Adobe > this is where you come in wink

websolete · Answer

i withdraw everything i said up to the combing part

Adam Cameron · Answer

< John Varady> your example could have been clearer that said And your question

sknowlton · Answer

also the point about `isDate ` and `isValid date ` having different definitions of a valid date no

websolete · Answer

i seem to recall isValid being the preferred replacement for isDate because of better date validation

Adam Cameron · Answer

I didn t even notice that f in hell

Adam Cameron · Answer

gt date or time any date time value including dates or times equivalent to the function gt

Adam Cameron · Answer

Sigh

Adam Cameron · Answer

However The behaviour does reflect what s documented yeah

John Varady · Answer

sorry for not being clearer my issue came down to this if else falling through and throwing a hard error when I expected the date to be valid Also I like to use the member functions whenever possible but they should have the same results as the function equivalent ``` if isValid date form st dob flash error Date of birth is required else if now diff d form st dob lt 0 flash error Date of birth is in the future else if now diff yyyy form st dob gt 20 flash error Date of birth is past deadline Student is over 20 years old ```

Mark Takata (Adobe) · Answer

``` Mark Takata Adobe this is where you come in wink ``` Not at 6am I don t LOL

Adam Cameron · Answer

HAHAHA

Adam Cameron · Answer

Sorry honey didn t mean to wake you

Mark Takata (Adobe) · Answer

s ok I m in training so I had to get up anyway lmao