外部データソースのデータタイプへの追加

Create a new data object to query the NHTSA REST service for vehicle model information.

1. In App Studio, from the left navigation pane, click Data > Data objects and integrations to open the Data objects and integrations landing page.
   
2. In the upper-right corner of the landing page, click New to open the Data Object wizard and create a data object to access the NHTSA service.
3. In the Data Object wizard, in the Data objects name field, enter NHTSA Model data.
4. In the System drop-down, select Create new. The wizard updates to display additional fields to define the new data source.
5. In the Name field, enter NHTSA vPIC.
6. In the Description field, enter NHTSA Product Information Catalog Vehicle Listing.
   
7. In the Endpoint URL field, enter https://vpic.nhtsa.dot.gov/api/vehicles/GetModelsForMakeYear/make/Ford/modelyear/2015/vehicletype/Truck?format=json to specify the URL for the NHTSA web service. The Parameters section expands to display the URL parts for the service URL.
8. Using the following table, add parameters for the make, model year, and vehicle type parts of the service URL.

   URL part	Parameter name
   Ford	make
   2015	modelyear
   Truck	vehicletype

   
9. Click Initialize call to call the REST service and advance to the second step of the wizard.

View a sample of the response data from the NHTSA REST service and map the response to the data model for the data object.

1. In the SearchCriteria row, click Add new to map the SearchCriteria field from the REST response to a field for the data object. The contents of the row update to display the Map to field and a drop-down listing field types.
2. In the SearchCriteria row, click the Add/Edit map to icon to accept the default mapping and create a text field named SearchCriteria in the data object.
   
3. Repeat steps 1 and 2 for the Results array and the Make_Name, Model_Name, and VehicleTypeName response fields.
   
4. Click Next to complete the data mapping and advance to the third step of the wizard.

Enter the integration settings to finish configuring the integration to the NHTSA REST service.

1. Under Endpoint URL, in the Name field, enter GetVehicleModels_BaseURL to identify the connection settings.
2. Under Stage, in the Base URL field, enter https://vpic.nhtsa.dot.gov to complete the URL used after migrating the application to a staging system.
3. Under Prod, in the Base URL field, enter https://vpic.nhtsa.dot.gov to complete the URL used after migrating the application to a production system.
4. Under Authentication, in the Name field, enter AuthProfile_NHTSA_vPIC.
   
5. Click Submit to complete the configuration of the data object and REST integration.

Configure the current simulated data source to call the NHTSA REST service twice to obtain a listing of vehicle models for both passenger cars and trucks.

1. In Dev Studio, from the left navigation pane, click Data types to list the data objects defined for the GoGoRoad application.
2. Expand the Vehicle model entry to list the data views configured for the data object.
3. Click List vehicle models to open the D_VehiclemodelsList data page, which caches a listing of vehicle models.
4. Clear the Simulate data source check box to remove the simulated data source from the data page.
5. In the Source drop-down, select Aggregate sources to source the data page using two REST calls.
6. In the Aggregate source name field, enter NHTSA vPIC to identify the data source for the data page.
7. In the Source drop-down, select Data transform.
8. Click Add source to add a second source for the data page.
9. In the second Source drop-down, select Data transform.
   

Configure a data transform to populate the data page with results from the NHTSA service.

1. For the first source, in the Data transform field, enter MapModels.
2. Click the open icon to create the data transform.
3. Click Create and open to accept the default settings and open the data transform rule form.
4. Define parameters for the data required by the NHTSA service.
   1. Click the Parameters tab to define three parameters needed by the NHTSA service.
   2. On the Parameters tab, click the add icon to add a row to define a parameter.
   3. In the empty parameter row, in the Name field, enter make.
   4. In the Required drop-down, select Yes.
   5. Repeat steps b-d to add two more parameters to the data transform, using the information in the following table.

      Name	Required
      modelyear	Yes
      vehicletype	Yes

5. Add information to resolve references to pages accessed by the data transform.
   1. Click the Pages & Classes tab to identify the pages used by the data transform and the class of each page.
   2. On the Pages & Classes tab, in the Page name field, enter Primary.pxResults to identify the page that contains the output of the data transform.
   3. In the Class field, enter or select GoGo-GoGoRoad-Data-VehicleModels to identify the class of the output page.
   4. Click the Add item icon to add a second row to the Pages & Classes tab.
   5. In the Page name field, enter D_NHTSAModelData.Results to identify the page that contains the output of the data transform.
   6. In the Class field, enter or select GoGo-GoGoRoad-Data-NHTSAModelData-Results to identify the class of the output page.
      
6. Configure the data transform logic.
   1. Click the Definition tab to configure the data transform logic.
   2. For step 1, in the Action drop down, select Append and Map to to create a new results page for each result returned. The data transform adds a child row labeled 1.1 below step 1.
   3. For step 1, in the Target field, enter Primary.pxResults.
   4. In the Relation drop-down, select each page in.
   5. In the Source field, enter D_NHTSAModelData[vehicletype:param.vehicletype,modelyear:param.modelyear,make:param.make].Results to pass the required parameters to the data page that calls the NHTSA service and caches the response.
   6. For step 1.1, in the Target field, enter or select .Make to set the value of the Make property on the target page.
   7. In the Source field, enter or select .Make_Name to identify the property to copy to the target.
   8. Click the plus icon twice to add steps 1.2 and 1.3 to the data transform.
   9. Complete the fields of steps 1.2 and 1.3 by using the information in the following table.

      	Action	Target	Source
      1.2	Set	.Model	.Model_Name
      1.3	Set	.VehicleType	.VehicleTypeName

      
7. Click Save to complete the configuration of the data transform.

Add parameters to the D_VehiclemodelsList data page and configure parameters for the aggregated data sources.

1. In Dev Studio, click the D_VehiclemodelsList tab to return to the data page rule form.
2. On the D_VehiclemodelsList data page rule form, click the Parameters tab to add parameters to the data page.
3. In the empty row, in the Name field, enter make to define a parameter for the make to pass to the data transform.
4. In the Required drop-down, select Yes to mark the parameter as required.
5. Click the add icon to add a second parameter to the data page.
6. In the second row, in the Name field, enter modelyear to define a parameter for the model year to pass to the data transform.
7. In the Required drop-down, select Yes to mark the parameter as required.
8. Click the Definition tab to resume configuration of the aggregate sources.
9. For the first aggregated source, set values for the parameters passed to the data transform.
   1. Below the Data transform name field, click Parameters to open a dialog box for setting values to pass to the data transform.
   2. In the dialog box, in the Value field for the make parameter, enter param.make to pass the value of the make parameter passed to the data page.
   3. In the Value field for the modelyear parameter, enter param.modelyear to pass the value of the model year parameter passed to the data page.
   4. In the Value field for the vehicletype parameter, enter "Passenger Car" to pass a constant string.
   5. Click Submit to close the modal dialog and save the parameter configuration.
10. For the second aggregate source, in the Data transform name field, enter or select MapModels to call the data transform a second time to populate the data page.
11. Press the [Tab] key to exit the field. The Parameters link is displayed below the Data transform name field.
12. Repeat step 9 for the second aggregated source to add parameter values for the MapModels data transform by using the information in the following table.

    Parameter	Value
    make	param.make
    modelyear	param.modelyear
    vehicletype	"Truck"

13. Click Save to complete the configuration of the data page.