How can I call a function in another CFC file from within a query of a function in one cfc file?

问题

I have one cfc file (info.cfc) with multiple functions as shown below.

<cfcomponent output="true" extends="DateFunctions">
    <cffunction name="getStatuses" access="remote" returntype="any" output="true" returnformat="plain">
       ...
    </cffunction>

    <cffunction name="viewDate" access="remote" returntype="any" output="true" returnformat="plain">
        <cfquery  name="records">
              SELECT
                 dbo.tickets.Incident,
                 dbo.tickets.Start_Date,
                 dbo.tickets.Days_Due
              FROM
                 dbo.tickets    
        </cfquery>
    </cffunction>
</component>

And the other cfc file (DateFunctions.cfc) containing the a function with two arguments and returning a date. The DateFunctions.cfc file is as follows:

<cfcomponent output="true" name="DateFunctions"">
    <cffunction name="addBusinessDays" access="remote" returntype="any" output="true" returnformat="plain">
       <cfargument name="daysToAdd" 
                required="yes" 
                type="numeric" 
                hint="The number of whole business days to add or subtract from the given date">
        <cfargument name="date" 
                required="No" 
                type="date" 
                hint="The date object to start counting from.." 
                default="#NowDateTime#">

         ...
         ... <!--- Perform some tasks --->

         <cfreturn Date>
    </cffunction>
</cfcomponent>

Question: How can I invoke "addBusinessDays" from within the query in (info.cfc) also producing another column of results.

I thought I might have been able to do something like:

<cffunction name="viewDate" access="remote" returntype="any" output="true" returnformat="plain">
    <cfquery  name="records">
          SELECT
             dbo.tickets.Incident,
             dbo.tickets.Start_Date,
             dbo.tickets.Days_Due,
             (
               <cfinvoke component="DateFunctions" method="addBusinessDays" returnVariable="Date">
                  <cfinvokeargument name="daysToAdd" value="#dbo.tickets.Days_Due#">
                  <cfinvokeargument name="date" value="#dbo.tickets.Start_Date#">
               </cfinvoke>
             ) AS Due_DATE
          FROM
             dbo.tickets    
    </cfquery>
</cffunction>

回答1:

You could do the following with the caveat of there would be additional processing for the loop.

Edit: Per discussion below, updated cfoutput to cfloop

 <cffunction name="viewDate" access="remote" returntype="any" output="true" returnformat="plain">
    <cfquery  name="records">
          SELECT
             dbo.tickets.Incident,
             dbo.tickets.Start_Date,
             dbo.tickets.Days_Due, 
            '' as Due_DATE
          FROM
             dbo.tickets    
    </cfquery>

    <cfset df = createobject("component","DateFunctions")>

    <cfloop query="records">
        <cfset records.Due_DATE = df.addBusinessDays(Days_Due, Start_Date)>
    </cfloop>

   <cfreturn records>
</cffunction>

回答2:

Rather than creating the df object, it should be tied to the this scope. That way the object is created only once. This should make the viewDate function run faster as there is no overhead in creating df.

Also, new is just a cleaner syntax

<cfcomponent>

    <cfset this.df =  new DateFunctions()>

    <cffunction name="viewDate" access="remote" returntype="any" output="false" returnformat="plain">
        <cfquery  name="Local.records">
           SELECT
                dbo.tickets.Incident,
                dbo.tickets.Start_Date,
                dbo.tickets.Days_Due, 
                CAST(NULL AS datetime)
           FROM
                dbo.tickets    
       </cfquery>


      <cfloop query="Local.records">
         <cfset Local.records.Due_DATE = this.df.addBusinessDays( Local.records.Days_Due, Local.records.Start_Date)>
      </cfloop>

      <cfreturn Local.records>
    </cffunction>

<cfcomponent>

来源：https://stackoverflow.com/questions/37757359/how-can-i-call-a-function-in-another-cfc-file-from-within-a-query-of-a-function

标签

sql

methods

coldfusion

invoke