Thread: Feature request
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Old April 21st, 2015, 10:37 AM
Dan Korn's Avatar
Dan Korn Dan Korn is offline
FusionPro Senior Engineer / Forum Moderator
Join Date: Aug 2008
Location: Chicago, IL
Posts: 4,442
Default Re: Feature request

That's not a bad idea. But the devil is in the details.

What specifically do you intend that this "re-mapping" feature would do? It's probably fine to replace variable call-outs in text, where a variable is inserted into the Variable Text Editor dialog, similar to how Font Replacement works. But there are some problems with this approach, since data fields are also used in rules. Automatically replacing field names in Drag-and-Drop rules, XML Template rules, and Switch Wizard rules could work, but things can get tricky in JavaScript.

For instance, would you expect that such "re-mapping" would search through JavaScript rules and replace calls to the Field function? What if the Field name was itself specified in a JavaScript variable, such as in this example?
var fieldName = (Field("Gender") == "M") ? "MalePhoto" : "FemalePhoto";
return CreateResource(Field(fieldName));
Or what if a rule iterates through multiple fields, like so?
var r = [];
for (var i = 1; i <= 10; i++)
    r.push(Field("Item " + i));
return r.join("\n");
Another common thing is to create a rule with the same name as a data field, to override the field's value, such as:
// Rule "State"
return ToUpper(Field(State));
Other scenarios include using the data file as an ExternalDataFileEx to aggregate data field values from multiple records together, calling alternative functions such as FieldChanged, TaggedDataField, and OptionalRuleOrField, and lots of other specialized functionality.

It would be almost impossible for any kind of "field mapper" to account for all of these kinds of ways that fields can be used in rules, so something that merely replaced field names in text could lead to jobs where those are mismatched from what rules are doing.
Dan Korn
FusionPro Developer / JavaScript Guru / Forum Moderator
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