how to implement a counter

Hi ,


i got a field in a form where i got a numeric value which represent a counter of the form data (  counter= counter +1, each time that a user try to open a new form data and try to save it )!.  any idea of how to implement this ?

and thanks

With Form Runner, or with your own load/save mechanism?

-Erik

On Sun, Apr 8, 2012 at 4:58 PM, globe <[hidden email]> wrote:

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Hi Eric,


with form runner; in fact i want to  do it threw a webservice ( that return a 'sequence' from the db  depending on the form/app ),  the only problem is how to retrieve the sequence from the webservice and load in the a field at the intialization of the form runner! , is there any example that show this manipulation ?.


and thanks

Mmh, I don't think we have an example. But you can create an action
that runs upon form load, calls the service, and then as action result
set the value of a hidden control (as just mentioned in a reply to
another question).

-Erik

On Tue, Apr 10, 2012 at 2:52 AM, globe <[hidden email]> wrote:

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Hi Globe

I don’t know if you got this working for you, but I thought I would share what I did for a similar situation:

I wanted to add a counter to forms created for ~application-name/form-name

Using Form Builder I created a new form definition ~application-name/counters.
This had one section – Counter (name:counter) and two output controls:

Form Name (form-name, include in summary)
Last Number (last-number)

In the form definition for the original form ~application-name/form-name:

2 Web Services:

Service Name: get-counter
Resource: /fr/service/persistence/crud/application-name/counters/data/form-name/data.xml
Method: GET
Serialization: XML
Request Body: <request/>

Service Name: update-counter
Resource: /fr/service/persistence/crud/application-name/counters/data/form-name/data.xml
Method: PUT
Serialization: XML
Request Body:
<form>
        <counter>
                <form-name>form-name</form-name>
                <last-number/>
        </counter>
</form>

1 Output Control: counter (or however you want to use the data)

2 Actions:

Action Name: populate-counter
Condition: Run on creation only
React to: Form Load
Service to call: get-counter
Response Control: Destination: Counter, Source XPath: (/form/counter/last-number+1)

Action Name: update-counter
Condition: Run always
React to: Value Change, Control: Counter
Service to call: update-counter
Service Request: Source: Counter, Destination XPath: /form/counter/last-number

The only customisation required is to add the scenario for the first form data (last-number doesn’t exist). For this you need to edit the source of the form definition:

Find the action definition <xf:action id="populate-counter-binding"> and add another action element as the last action:

…
        <xf:action ev:event="xforms-submit-error" ev:observer="get-counter-submission"
                        context="instance('fr-service-response-instance')">
                <xf:action class="fr-set-control-value-action">
                        <xf:var name="control-name" value="'counter'" as="xs:string"/>
                        <xf:var name="control-value" value="1" as="xs:string"/>
                        <xf:setvalue ref="instance('fr-form-instance')/*/*[name() = $control-name]"
                                     value="$control-value"/>
                </xf:action>
        </xf:action>
…

replace the control-name value of counter with the Output control defined above.

You don't really need to use Form Builder for the creation of the counter form definition, but doing it this way also means that you can view your counters at /fr/application-name/counters/summary and if you change the last-number to an input control you can restart your count easily using FR.

This solution allocates a counter on form load, to allocate on form save change the listener on the populate-counter-binding action to:

<xf:action ev:event="fr-data-save-prepare" ev:observer="fr-form-model" if="$fr-mode='new'">
                    <xf:send submission="get-counter-submission"/>

Regards

Jeremy

First please excuse my ignorance but I'm totally new to this. This is my second day with orbeon (still learning). I created what I thought was a great looking form, only to be told I needed a counter on the form to issue upon printing out as a pdf. I'm working with the free version.

Anyway, I found what I believe is what I need below. The counter, but how do I insert this?

Do I create a new formatted text control?
or Do I edit source then put the code somewhere in there?
or Do I put it in controls validation properties under Calculated Value?

Again be gentle I'm very new at this, and basically have no idea what I'm doing except for the easy drag drop and clicking of this program.

Thanks you for the help.
Randy

Randy,

You don't need a formatted text control: that is to do things like bold, italics, etc.

To clarify: what is the requirement of your counter? Where is the source of truth for that counter going to be? In a database?

-Erik

Although I would want it to go into the database as a unique ID. It is mostly to issue with the form (a permit with a unique number).

I don't know if that would work for you, but each form already has an automatically generated UUID.

You could use the following as an initial value for an output field:

    xxf:instance('fr-parameters')/document

That field will then hold the UUID generated by Form Runner.

-Erik

    So,  xxf:instance('fr-parameters')/document  would give me a or the
UUID on the form? I tried pasting that into the initial value of a text
output control and got nothing when I brought the new page of the form up?




On Mon, Mar 24, 2014 at 1:14 PM, Erik Bruchez [via Orbeon Forms community
mailing list] <ml-node+s24843n4658138h24@n4.nabble.com> wrote:

> I don't know if that would work for you, but each form already has an
> automatically generated UUID.
>
> You could use the following as an initial value for an output field:
>
>     xxf:instance('fr-parameters')/document
>
> That field will then hold the UUID generated by Form Runner.
>
> -Erik
>
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There was a typo in Erik's answer. Instead, try (note the '-instance'):

xxf:instance('fr-parameters-instance')/document

Alex