Get value from CDT array

RE: Get value from CDT array

Thomas Loiseau — Tue, 16 Jul 2019 07:23:40 GMT

Still the same error

An error occurred while evaluating expression: power:pv!response.eurotaxIdentificationResponse.VehicleList.Vehicle.Engine.Power (Cannot index "Power" because it is an array type (List of PSA_Unit_Value_Type). Only fields with scalar types can be indexed from an array.) (Data Outputs)

I put some screen and info down this post

RE: Get value from CDT array

Thomas Loiseau — Tue, 16 Jul 2019 07:18:54 GMT

Engine CDT

Unit_Value CDT

The API returns this:

{
  "eurotaxIdentificationResponse": {
    "Settings": {
      "ISOcountryCode": "FR",
      "ISOlanguageCode": "FR",
      "ISOcurrencyCode": "EUR"
    },
    "VehicleList": {
      "Vehicle": [
        {
          "VehicleType": {
            "VehicleTypeCode": "10",
            "Name": "Véhicule particulier",
            "ShortName": "VP"
          },
          "Make": {
            "MakeCode": "2",
            "Name": "PEUGEOT"
          },
          "Model": {
            "ModelCode": "6640",
            "Name": "308"
          },
          "Type": {
            "NationalVehicleCode": "193363",
            "InternationalVehicleCode": "10042205023",
            "Name": "308 1.6 BlueHDi 120ch S&S BVM6 BC",
            "TrimLineName": "Active",
            "ProductionPeriod": {
              "ProductionStartDate": {
                "Month": "05",
                "Year": "2017"
              },
              "ProductionEndDate": {
                "Month": "10",
                "Year": "2017"
              }
            },
            "NewPrice": {
              "RequestedLowerBound": "0.00",
              "Price": {
                "Amount": "26100.00",
                "ISOcurrencyCode": "EUR",
                "AmountDate": {
                  "Month": "07",
                  "Year": "2017"
                },
                "Indicator": "0"
              }
            },
            "SortCode": "3020"
          },
          "MarketSegment": {
            "MarketSegmentDescription": {
              "Code": "30004",
              "Name": "M1"
            }
          },
          "Body": {
            "BodyStyleDescription": {
              "Code": "10060",
              "Name": "Ber",
              "NameEx": "Berline"
            },
            "DoorsNumber": "5"
          },
          "Transmission": {
            "DriveType": {
              "Code": "50001",
              "Name": "TAV",
              "NameEx": "Traction avant"
            },
            "GearBox": {
              "Type": {
                "Code": "180001",
                "Name": "M",
                "NameEx": "Boîte manuelle"
              },
              "GearsNumber": "6"
            }
          },
          "Engine": {
            "Fuel": {
              "Code": "100003",
              "Name": "D",
              "NameEx": "Diesel"
            },
            "Layout": {
              "Name": "l"
            },
            "Power": [
              {
                "Value": "88.00",
                "Unit": "KW"
              },
              {
                "Value": "120.00",
                "Unit": "HP"
              }
            ],
            "Displacement": {
              "Value": "1560.00",
              "Unit": "ccm"
            },
            "CylindersNumber": "4",
            "ValvesPerCylinder": "2"
          },
          "Miscellaneous": {
            "TotalWeight": {
              "Value": "1810.00",
              "Unit": "kg"
            },
            "PayLoad": {
              "Value": "625.00",
              "Unit": "kg"
            },
            "Wheelbase": {
              "Value": "2620.00",
              "Unit": "mm"
            },
            "Wheelbase2": {
              "Value": "0.00",
              "Unit": "mm"
            },
            "SeatsNumber": "5",
            "CurbWeight": {
              "Value": "1185.00",
              "Unit": "kg"
            },
            "ManufacturerProductID": [
              "1PT9 A5LKD KB0 BM C0"
            ],
            "TaxHorsePower": {
              "Value": "5.00",
              "Unit": "HP"
            }
          }
        }
      ]
    },
    "status": "OK",
    "message": "success"
  }
}

I create a lot of type to parse this JSON data. I don't know if it's the right way.

RE: Get value from CDT array

ankitab0001 — Tue, 16 Jul 2019 04:45:08 GMT

Hi @thomas

Can you try something like this

load(
  
  local!engine: {
    Fuel: 
        {Code: "100003",
        Name: "D",
        NameEx: "Diesel"
        },
    Layout: 
        {Name: "l"},
    Power: {{
            Value: "88.00",
            Unit: "KW"
            },
            {
            Value: "120.00",
            Unit: "HP"
            }
            },
    Displacement: {
        Value: "1560.00",
        Unit: "ccm"
        },
    CylindersNumber: "4",
    ValvesPerCylinder: "2"
    },
    
    local!power: index(local!engine,"Power",{}),
    index(index(local!power,"Value",{}), wherecontains("HP",apply(tostring(_),index(local!power,"Unit",{}))),{})
)

RE: Get value from CDT array

davel001150 — Mon, 15 Jul 2019 20:21:28 GMT

The error states there's a vehicleList. The error explicitly states you're not able to index an array member from an array of CDT. You have to have 2 arrays at minimum in order to generate the error.

Perhaps it would be best to look at both how you call it in the rule and how you call it in the process model.

It might be something as simple as accidentally hitting the check box that says a PV is multiple. Even if it is only 1 item in that case, it's a 1 length list and won't let you index.

RE: Get value from CDT array

Mike Schmitt — Mon, 15 Jul 2019 15:17:26 GMT

Can you post some more information (i.e. a screenshot maybe) of the structure of the "pv!response" data type? Including how it's nested and what level(s) include array values as opposed to single values.

RE: Get value from CDT array

Thomas Loiseau — Mon, 15 Jul 2019 13:43:01 GMT

I call my expression rule and pass the following data:

Power=[Unit=KW, Value=88.00],[Unit=HP, Value=120.00]

from this:

Engine=[Fuel=[Code=100003, Name=D, NameEx=Diesel], unbounded=, Displacement=[Unit=ccm, Value=1560.00], ValvesPerCylinder=2, CylindersNumber=4, Power=[Unit=KW, Value=88.00],[Unit=HP, Value=120.00]]

The purpose of my expression rule is to get the value when the unit is equal to "HP"

The power is expressed in multiple units but I only need one.

I don't understand why you mention that I have multiple car.

RE: Get value from CDT array

davel001150 — Mon, 15 Jul 2019 13:35:59 GMT

Looking at your error, it appears to be farther upstream. It looks like you haven't included the entirety of your response. If your response has a Vehicle list, and each in a list of Vehicles has an Engine with a list of Power, you've got nested arrays. You can't index nested arrays all at once. If you had 10 Vehicles, you'd be trying to index 10 sets of 2 Powers. It can do a set of 2, or 10 things, but it can't do 10 sets of 2 all at once.

The solution is index all the vehicles one at a time in a larger parent rule with a!forEach. Call a helper rule on each vehicle. To that rule's perspective, you have only 1 Vehicle (10 times it thinks you only have 1 Vehicle), so you can pull the array of Powers out of just one vehicle. Then you can get the one "HP" based value and have the helper rule return that, which will return one at a time in the larger a!forEach, resulting in a list of HP values.