Evaluate function

Question

Is there a better way to write the following?

<cfloop list="#qry.Columnlist#" index="FieldName">
   <cfset "form.#FieldName#" = Evaluate("qry.#FieldName#")>
</cfloop>

This loop is assigning every field in the query to a corresponding form field. I understand the evaluate function is shunned.

Jotun

Answer 1

<cfloop list="#qry.Columnlist#" index="FieldName">
    <cfset form[FieldName] = qry[FieldName][1]>
</cfloop>

?

Coalesce

Good answer! I was looking for a solution to this today too. – Palsgrave

What about evaluate("qry.#myArr[i].foo#") I tried qry[myArr[i][foo]] but no luck – Ana

@Ana not sure what u're asking there, but for array object, it's [fieldName][rowIndex]. Is foo the rowIndex? if so, set myArr[1] to some var first, then use that. CF might not like nested [] – Coalesce

myArr is an array of structs, so foo is an attribute in the struct. – Ana

Answer 2

Assuming you are returning a single recordset the following will work.

<cfloop list="#qry.Columnlist#" index="FieldName">
<cfset "form.#FieldName#" = qry[FieldName][1]>
</cfloop>

Joashus

Technically, there is nothing wrong with that. But you may as well go the whole way and use array notation for both sides of the cfset ;) – Casement

Answer 3

Tangential, but if you were looping over multiple rows of a query, you could use the currentRow variable in the query object to do the same thing as the accepted answer.

<cfset var someStruct = {} />
<cfset var colummnList = queryObj.columnList />

<cfloop query="queryObj">
    <cfset someStruct[currentRow] = {} />        

    <cfloop list="#columnList#" index="fieldName">
        <cfset someStruct[currentRow][fieldName] = queryObj[fieldName][currentRow] />
    </cfloop>
</cfloop>

Lith

Very interesting. I'm getting confused mixing struct notation and array notation, but I'll look into this. Thanks! – Jotun

Yah sorry, {} is shorthand for StructNew() and [] is shorthand for ArrayNew(1) – Lith