Exercise 24.4 in Appian Community Edition

hi antonios855139  that is the general example, in reality when you use you need to have your actual record type as mentioned in below image;

recordtype!yourrecordname.fileds.image

Actually i put my record type reference ... 

if( a!isNullOrEmpty(
fv!row['recordType!{aa4ce38f-1a9d-4827-af51-e2ccb80a2c8b-w2474as}W2474AS Vehicle.fields.{8b9b140f-deaf-4ca3-8066-1c4624cda5ea-w2474as}image']
),
a!EXAMPLE_DOCUMENT_IMAGE(),
fv!row['recordType!{aa4ce38f-1a9d-4827-af51-e2ccb80a2c8b-w2474as}W2474AS Vehicle.fields.{8b9b140f-deaf-4ca3-8066-1c4624cda5ea-w2474as}image']
)

can you show your grid code please

{
a!gridColumn(
label: "VIN",
sortField: 'recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{5c8fb76e-a709-41b6-ba8d-4b6df2a5328f}vin',
value: a!linkField(
links: {
a!recordLink(
label: fv!row['recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{5c8fb76e-a709-41b6-ba8d-4b6df2a5328f}vin'],
recordType: /*<add record type reference here>*/ 'recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle',
identifier: fv!identifier
)
}
)
),
a!gridColumn(
label: "Make",
sortField: 'recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{d5f04165-440d-42eb-9933-c7a124a6f6c4}make',
value: a!defaultValue(fv!row['recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{d5f04165-440d-42eb-9933-c7a124a6f6c4}make'], "–")
),
a!gridColumn(
label: "Model",
sortField: 'recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{8e80af0d-a875-47aa-8231-7b197cb43fc4}model',
value: a!defaultValue(fv!row['recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{8e80af0d-a875-47aa-8231-7b197cb43fc4}model'], "–")
),
a!gridColumn(
label: "Year",
sortField: 'recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{8bad8794-74af-448f-b993-260e9a2b7d34}year',
value: a!defaultValue(fv!row['recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{8bad8794-74af-448f-b993-260e9a2b7d34}year'], "–"),
align: "END"
),
a!gridColumn(
label: "Next Maintenance Date",
sortField: 'recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{2a791f61-c783-4789-9e32-765d0e51936d}nextMaintenanceDate',
value: a!defaultValue(fv!row['recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{2a791f61-c783-4789-9e32-765d0e51936d}nextMaintenanceDate'], "–"),
align: "END"
),
a!gridColumn(
label: "Added By",
sortField: 'recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{7cdf18f6-43e4-4330-84d8-2455475a9d1c}addedBy',
value: rule!W2474SA_FormatDisplayName_bis(user:fv!row['recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{7cdf18f6-43e4-4330-84d8-2455475a9d1c}addedBy'])
),
a!gridColumn(
label: "Mileage Category",
sortField: 'recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{91a4b61b-53c2-416d-adc7-eb3c4f90826c}mileageCategory',
value: fv!row['recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{91a4b61b-53c2-416d-adc7-eb3c4f90826c}mileageCategory'],
align: "START"
),
a!gridColumn(
label: "Image",
sortField: 'recordType!{8a9738bb-dd78-47a9-ab5d-35837741eaa9}W2474SA Vehicle.fields.{b15d91fc-012e-4f8f-9a65-4d873c922673}image',
value: a!imageField(
images: a!documentImage(
document: if( a!isNullOrEmpty(
fv!row['recordType!{aa4ce38f-1a9d-4827-af51-e2ccb80a2c8b-w2474as}W2474AS Vehicle.fields.{8b9b140f-deaf-4ca3-8066-1c4624cda5ea-w2474as}image']
),
a!EXAMPLE_DOCUMENT_IMAGE(),
fv!row['recordType!{aa4ce38f-1a9d-4827-af51-e2ccb80a2c8b-w2474as}W2474AS Vehicle.fields.{8b9b140f-deaf-4ca3-8066-1c4624cda5ea-w2474as}image']
)

),
size: "GALLERY"
),
align: "CENTER"
)
}

Hi antonios855139  could you try this code by the replacing your record type in the given code 

a!gridColumn(

        label: "Image",

        helpTooltip: "Test images may not represent the actual vehicle",

        value: a!imageField(

          images: a!documentImage(

            document: if(

            /*Replace with your record type*/

              isnull(

                fv!row['recordType!{99b0bb09-e2c0-4f75-a70b-26f247e2d095}AA Vehicle.fields.{c7d0b689-e98f-4cb7-8477-6c63943b30a0}image']

              ),

              a!EXAMPLE_DOCUMENT_IMAGE(),

              /*Replace with your record type*/

              fv!row['recordType!{99b0bb09-e2c0-4f75-a70b-26f247e2d095}AA Vehicle.fields.{c7d0b689-e98f-4cb7-8477-6c63943b30a0}image']

            )

          ),

          size: "SMALL"

        ),

        align: "CENTER"

      ),

tried but same error 

Is your record having any data ? Like is your record data consists of document ids ? Or is your record empty? In your database are there any rows ? Or empty 

I've looked into the cloud and AS_VEHICLE has 44 rows with data. Image field is null in all rows

You need to have document ID in that field, the error says that, since values are null it is unable to find the image 

Tks for the help Abhishek. 

I understand what you are saying, but the exercise tries to put a condition "if" that should bypass this problem. The expression that the exercise give me is to check if the value is null and if it is so, put the default image instead. So i dont understand where the problem is. 

From the execise book <<

if( a!isNullOrEmpty(
fv!row[recordType!W#SA Vehicle.fields.image]
),
a!EXAMPLE_DOCUMENT_IMAGE(),
fv!row[recordType!W#SA Vehicle.fields.image]
)
This expression checks whether the image field is null. If it is null, it displays an
example document image. The example document image is displayed for
existing vehicle data; you will be able to upload vehicle images when you add
new vehicles to the fleet in later exercises.

>>