Details
Description
The 'validwhen' rule defines the literal this, which contains the
value of the field currently being tested.
It would be nice to have something like this.index or [].count, which
contains the index of the property being tested.
That way, I could, for example, create a rule that applies to every
other indexed property:
<var-value>((this.index % 2 == '0') and (this != null))</var-value>
.. or, I could create a more meaniningful validation message, such as:
"Employment #2: must specify a start date for primary employer 'Motown Music'."
.. using something like:
<field property="startDate" indexedListProperty="emps" depends="validwhen">
<msg name="validwhen" key="errors.startdate.required" />
<arg0 property="this.index"/>
<arg1 property="emps[].employerName"/>
<var>
<var-name>test</var-name>
<var-value>(((this.index == '0') and (this != null)) or (this.index
== '0'))</var-value>
</var>
</field>
There is actually another enhancement disguised in the above. Currently,
arg0-arg3 only accept the attribute 'key'. I suggest adding another
attribute called 'property' (for example) that allows me to pass values
of indexed properties as message params. You should be allowed to use
this or a similar attribute to pass the index value (this.index) too.
While I'm at it, here's another suggestion too – how about an 'invalidwhen'
rule. So that I don't have to have ugly rules like the above:
<var-value>(((this.index == '0') and (this != null)) or (this.index !
= '0'))</var-value>
.. If I had a 'invalidwhen' rule, I could use the following instead:
((this.index == '0') and (this == null))
Just a few suggestions. Let me know what you think.
-jim
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Issue Links
- is duplicated by
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STR-2312 [validator] Validation message - value, index not accessible
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- Open
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