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Re: Fishing for constraint => SQL designs

by nferraz (Monk)
on May 23, 2007 at 10:32 UTC ( #616969=note: print w/ replies, xml ) Need Help??

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  1. or download this
        <table name="foo">
            <field name="a" required="1"/>
            <field name="b" validate="\d+\.\d+\.\d+"/>
            <field name="c" required="if a"/>
  2. or download this
        package Model::Validate::Foo;
                die "c is required if a" if $value_of{a};
  3. or download this
        <table name="foo">
            <constraint name="avg_a" value="average(a) > 100"/>
  4. or download this
        sub avg_a {
            # called on insert, update of table foo
            # check if average(a) > 100

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