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TEST FOR 0 OR ID (length of 11)
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TEST FOR 0 OR ID (length of 11) 14 Oct 2012 15:37 #4479

  • JoomGuy
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OK,

I needed to to be able to validate a zero value (0) or a valid integer with a max length of 11 digits for a parent_id field in a nested table (like com_categories table) that I'm working on...

This is how:
^([0-9]{1,1}|[1-9]([0-9]{1,10}))$

How it works:
  • The outer parentheses '()' allow separate arguments
  • The pipe '|' denotes an OR statement
  • Square brackets denote acceptable characters
  • Curly braces '{val1, val2}' specify, upper (val2) and lower (val1) length
So, this regex basically says,
  1. IF the first character matches anything between 0 and 9 ([0-9]) and is only 1 digit long ({1,1}) OR (|)
  2. IF the first character matches anything between 1 and 9 ([1-9]) AND any subsequent characters are between 0 and 9 to a total length of 10 and a minimum of 1 then... RETURN TRUE
ELSE
  • RETURN FALSE
    • **N.B.We only check for a length of 10 as we are only checking everything after the first character in the second case. There are 11 in total - the maximum length of ID fields in the DB**

    Hope this Helps!!!

    Gez
    Need help with your Cook/Joomla Project? . PM me to find out what I can help with. NO time wasters please!!!

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    Re: TEST FOR 0 OR ID (length of 11) 22 Dec 2012 15:18 #6242

    • JoomGuy
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    audibleid wrote: This is how:

    ^([0-9]{1,1}|[1-9]([0-9]{1,10}))$

    Shortens to by removing extra parentheses & {1,1}:
    ^([0-9]|[1-9][0-9]{1,10})$
    Gez
    Need help with your Cook/Joomla Project? . PM me to find out what I can help with. NO time wasters please!!!

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    Re: TEST FOR 0 OR ID (length of 11) 26 Dec 2012 09:24 #6274

    • g1smd
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    ^([0-9]|[1-9][0-9]{1,10})$

    Yes, that would work, but it simplifies even more:
    ^(0|[1-9][0-9]{0,10})$
    or
    ^(0|[1-9]\d{,10})$
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    TEST FOR 0 OR ID (length of 11)
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    This is what you call a component builder. I was able to master using this in a very short time and the resulting component works like a charm. Not just a basic component builder but a fully working component builder with forms fields tables all ready to go. You can make the list and item views to display in the front and back end. Also there is a great forum just starting to evolve and I'm sure this will grow very rapidly when you all realise how good this tool is.
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