Unknown attribute from class between two custom extensions

[Juan Palacios]

Hello friends I hope you can help me

I am creating some extensions in itop but I have some doubts or small problems and I think it is because I am new and I have only guided myself from the documentation on the wiki.

I made an extension to register a vehicle which has a number_vehicle assigned (it works fine without problems).
I'm making another extension to create a device that goes inside the vehicle. As an example, I can tell you a POS.

This device (POS) have: name, org_id, status, business_criticity, brand_id, model_id, serialnumber but need to have the number_vehicle creating on the firts extension, i just call the item id on the datamodel.

 <item id="number_vehicle">
              <rank>50</rank>
 </item>

My problem is that when uploading the extension to the toolkit it generates an error “Unknown attribute number_vehicle from class POS“
I am using itop 3.0.0 and toolkit 3.0.0

[Vincent @ Combodo]

You must declare under class POS
1. a field "vehicle_id" as externalKey to the class Vehicle to specify in which vehicle your POS is installed
2. Then a field "number_vehicle" as an ExternalField based on "vehicule_id" and field "number_vehicle" from the remote class pointed by "vehicule_id" which would automatically display in the POS object a property of the Vehicle object

[Juan Palacios]

Thanks Vincent,

It worked just like you told me
But I realized that I have to make another change,
In my vehicle class, in addition to the number_vehicle field, which is an internal number, I also have a field called license_plate
When I call number_vehicle at the POS, it shows me to select among the registered vehicles and if I call the license plate it gives me the option to select as well and this should not be selectable, it should show me the license_plate associated with the number_vehicle, I don't know if you understand me.

I put the code I use.

<field id="number_vehicle" xsi:type="AttributeExternalKey"> 
          <sql>number_vehicle</sql>
          <is_null_allowed>true</is_null_allowed>
          <on_target_delete>DEL_AUTO</on_target_delete>
          <target_class>vehicle</target_class>
</field>
<field id="licence_plate" xsi:type="AttributeExternalKey"> 
          <sql>licence_plate</sql>
          <is_null_allowed>true</is_null_allowed>
          <on_target_delete>DEL_AUTO</on_target_delete>
          <target_class>vehicle</target_class>
</field>

I appreciate your help