Passing values to a view

[J V-3]

Hi all and excuse me if a dumb question but...

Let's say I have two views (EmployeeView and CustomerView) with a common
part that shows personal information and I create a common view file to
deal with if (dspPersonInfo.cfm).

<event-handler name="employee.info">
  <broadcasts>
    <message name="NeedEmployee" />
  </broadcasts>
  <views>
    <include name="personInfo" template="dspPersonInfo.cfm">
      <value name="person" value="??????????" />
    </include>
    <include name="employeeView" template="dspEmployeeView.cfm" />
  </views>
  <results>
    <result do="view.template" />
  </results>
</event-handler>

<event-handler name="customer.info">
  <broadcasts>
    <message name="NeedCustomer" />
  </broadcasts>
  <views>
    <include name="personInfo" template="dspPersonInfo.cfm">
      <value name="person" value="??????????" />
    </include>
    <include name="customerView" template="dspCustomerView.cfm" />
  </views>
  <results>
    <result do="view.template" />
  </results>
</event-handler>

Before calling the views I send a message to get the Employee or
Customer info (NeedEmployee / NeedCustomer). These messages call two
different controller methods that write into event/viewstate two
different variables (employee or customer).

<function name="getEmployee" ...>
  ...
  <cfset event.setValue("employee", local.employee)>
</function>

<function name="getCustomer" ...>
  ...
  <cfset event.setValue("customer", local.customer)>
</function>


The question is: is it possible to pass a variable value in

    <include name="personInfo" template="dspPersonInfo.cfm">
      <value name="person" value="??????????" />
    </include>

instead of a literal?

The only workaround I can think about is passing to the view not the
value but the name of the event variable that contains the value (i.e.
passing "employee" or "customer") but I don't like this very much as I  
don't consider this natural when writing the dspPersonInfo view.

Thanks for the help,

Jesús

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[Ryan Stocker-2]

Jesús,

I'm not a model-glue "pattern guru" by any means, so please take this  
with a grain of salt :)  I would consider:

1. make the dspPersonInfo.cfm have a if/elseif so you can determine  
whether you have a customer or employee object.  Something like:

<cfif viewState.Exists("customer")>

//fetch the customer, do some customer view stuff here

<cfelseif viewState.Exists("employee")>

//fetch the employee do some employee view stuff here

</cfif>

(optionally you could wait and do view stuff here, depending on how  
different customer and employee are for this view)

or

2. you could create two partial view templates, dspCustomerInfo.cfm  
and dspEmployeeInfo.cfm, each being specialized to deal with their  
respective types of people.  Since model-glue allows you to name  
partial views, your layout page could still just output the  
"personInfo" from the viewCollection.

or

3. Use the argument you're passing to the view (from ModelGlue.xml)  
and then fetch the object accordingly:

<cfset personType = viewState.GetValue("person") /> <!--- get the  
literal passed from ModelGlue.xml --->
<cfset objMyPerson = viewState.GetValue(personType) />

<cfoutput>
<p>Hello, #objMyPerson.getFirstName()# #objMyPerson.getLastName()#</p>
</cfoutput>


.. hope that helps!



On May 7, 2007, at 4:58 AM, jesupi@... wrote:

> Hi all and excuse me if a dumb question but...
>
> Let's say I have two views (EmployeeView and CustomerView) with a  
> common
> part that shows personal information and I create a common view  
> file to
> deal with if (dspPersonInfo.cfm).
>
> <event-handler name="employee.info">
>   <broadcasts>
>     <message name="NeedEmployee" />
>   </broadcasts>
>   <views>
>     <include name="personInfo" template="dspPersonInfo.cfm">
>       <value name="person" value="??????????" />
>     </include>
>     <include name="employeeView" template="dspEmployeeView.cfm" />
>   </views>
>   <results>
>     <result do="view.template" />
>   </results>
> </event-handler>
>
> <event-handler name="customer.info">
>   <broadcasts>
>     <message name="NeedCustomer" />
>   </broadcasts>
>   <views>
>     <include name="personInfo" template="dspPersonInfo.cfm">
>       <value name="person" value="??????????" />
>     </include>
>     <include name="customerView" template="dspCustomerView.cfm" />
>   </views>
>   <results>
>     <result do="view.template" />
>   </results>
> </event-handler>
>
> Before calling the views I send a message to get the Employee or
> Customer info (NeedEmployee / NeedCustomer). These messages call two
> different controller methods that write into event/viewstate two
> different variables (employee or customer).
>
> <function name="getEmployee" ...>
>   ...
>   <cfset event.setValue("employee", local.employee)>
> </function>
>
> <function name="getCustomer" ...>
>   ...
>   <cfset event.setValue("customer", local.customer)>
> </function>
>
>
> The question is: is it possible to pass a variable value in
>
>     <include name="personInfo" template="dspPersonInfo.cfm">
>       <value name="person" value="??????????" />
>     </include>
>
> instead of a literal?
>
> The only workaround I can think about is passing to the view not the
> value but the name of the event variable that contains the value (i.e.
> passing "employee" or "customer") but I don't like this very much as I
> don't consider this natural when writing the dspPersonInfo view.
>
> Thanks for the help,
>
> Jesús
>
>
>
>
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[J V-3]

Hi Ryan,

It sure helps, at least to think on the alternatives.

The problem I see with the two first suggestions is that they make
dspPersonInfo.cfm tightly coupled to the person type or you have to
replicate files that are "almost" identical. They could be the solution
in some cases, but...

Whilst there is no direct way to pass a "variable" value to the view
from the Model-Glue.xml, I prefer using the last solution because it
allows a more general approach.

Thanks,

Jesús

Ryan Stocker wrote:

>
> Jesús,
>
> I'm not a model-glue "pattern guru" by any means, so please take this  
> with a grain of salt :)  I would consider:
>
> 1. make the dspPersonInfo.cfm have a if/elseif so you can determine  
> whether you have a customer or employee object.  Something like:
>
> <cfif viewState.Exists("customer")>
>
> //fetch the customer, do some customer view stuff here
>
> <cfelseif viewState.Exists("employee")>
>
> //fetch the employee do some employee view stuff here
>
> </cfif>
>
> (optionally you could wait and do view stuff here, depending on how  
> different customer and employee are for this view)
>
> or
>
> 2. you could create two partial view templates, dspCustomerInfo.cfm  
> and dspEmployeeInfo.cfm, each being specialized to deal with their  
> respective types of people.  Since model-glue allows you to name  
> partial views, your layout page could still just output the  
> "personInfo" from the viewCollection.
>
> or
>
> 3. Use the argument you're passing to the view (from ModelGlue.xml)  
> and then fetch the object accordingly:
>
> <cfset personType = viewState.GetValue("person") /> <!--- get the  
> literal passed from ModelGlue.xml --->
> <cfset objMyPerson = viewState.GetValue(personType) />
>
> <cfoutput>
> <p>Hello, #objMyPerson.getFirstName()# #objMyPerson.getLastName()#</p>
> </cfoutput>
>
>
> .. hope that helps!
>
>
>
> On May 7, 2007, at 4:58 AM, jesupi@... wrote:
>
> > Hi all and excuse me if a dumb question but...
> >
> > Let's say I have two views (EmployeeView and CustomerView) with a  
> > common
> > part that shows personal information and I create a common view  
> > file to
> > deal with if (dspPersonInfo.cfm).
> >
> > <event-handler name="employee.info">
> >   <broadcasts>
> >     <message name="NeedEmployee" />
> >   </broadcasts>
> >   <views>
> >     <include name="personInfo" template="dspPersonInfo.cfm">
> >       <value name="person" value="??????????" />
> >     </include>
> >     <include name="employeeView" template="dspEmployeeView.cfm" />
> >   </views>
> >   <results>
> >     <result do="view.template" />
> >   </results>
> > </event-handler>
> >
> > <event-handler name="customer.info">
> >   <broadcasts>
> >     <message name="NeedCustomer" />
> >   </broadcasts>
> >   <views>
> >     <include name="personInfo" template="dspPersonInfo.cfm">
> >       <value name="person" value="??????????" />
> >     </include>
> >     <include name="customerView" template="dspCustomerView.cfm" />
> >   </views>
> >   <results>
> >     <result do="view.template" />
> >   </results>
> > </event-handler>
> >
> > Before calling the views I send a message to get the Employee or
> > Customer info (NeedEmployee / NeedCustomer). These messages call two
> > different controller methods that write into event/viewstate two
> > different variables (employee or customer).
> >
> > <function name="getEmployee" ...>
> >   ...
> >   <cfset event.setValue("employee", local.employee)>
> > </function>
> >
> > <function name="getCustomer" ...>
> >   ...
> >   <cfset event.setValue("customer", local.customer)>
> > </function>
> >
> >
> > The question is: is it possible to pass a variable value in
> >
> >     <include name="personInfo" template="dspPersonInfo.cfm">
> >       <value name="person" value="??????????" />
> >     </include>
> >
> > instead of a literal?
> >
> > The only workaround I can think about is passing to the view not the
> > value but the name of the event variable that contains the value (i.e.
> > passing "employee" or "customer") but I don't like this very much as I
> > don't consider this natural when writing the dspPersonInfo view.
> >
> > Thanks for the help,
> >
> > Jesús
> >
> >
> >
> >
> > --
> > BEGIN-ANTISPAM-VOTING-LINKS
> > ------------------------------------------------------
> >
> > Teach CanIt if this mail (ID 297627046) is spam:
> > Spam:        https://antispam.osu.edu/b.php?
> > c=s&i=297627046&m=ecfafb79d2ee
> > Not spam:    https://antispam.osu.edu/b.php?
> > c=n&i=297627046&m=ecfafb79d2ee
> > Forget vote: https://antispam.osu.edu/b.php?
> > c=f&i=297627046&m=ecfafb79d2ee
> > ------------------------------------------------------
> > END-ANTISPAM-VOTING-LINKS
> >
>

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