Hey everyone, I’ve run into a really strange issue with the Genesys Cloud Architect API when updating a flow via Terraform. The genesyscloud_flow resource fails with a 400 Bad Request during the apply phase.
Specifically, the conditional-group block throws a validation error when the condition type is set to expression and references a custom attribute from the interaction object. The HCL looks valid, and the same flow deploys fine via the UI. The error payload just says invalid condition expression without pointing to the specific syntax issue.
Here is the snippet causing the failure:
conditional_group {
name = "Check Custom Attr"
conditions {
type = "expression"
expression = "interaction.attributes.custom_value == 'test'"
}
}
Is there a known limitation with expression parsing in the v2 API for conditional groups?
Have you tried isolating the expression syntax within the conditional group?
While I usually focus on WFM scheduling and shift swaps, I see this pattern pop up in integration configs all the time. The issue often isn’t the HCL structure itself, but how the Genesys Cloud API parses nested objects from the interaction object. When using Terraform, the JSON serialization can sometimes flatten the structure in a way that breaks the strict schema validation for expression types.
Instead of passing the full object path in the condition string, try pre-defining the custom attribute in a local variable within your Terraform module. This forces a cleaner JSON structure for the API payload.
locals {
custom_attr_path = "interaction.custom_attributes.my_field"
}
resource "genesyscloud_flow" "example_flow" {
name = "Test Flow"
flow {
// ... other config
conditional_group {
name = "Check Custom Attr"
condition {
type = "expression"
# Use the local variable to ensure clean string interpolation
expression = "isPresent(${local.custom_attr_path})"
}
# ... outcomes
}
}
}
This approach mirrors how we handle dynamic timezone offsets in WFM API calls-keeping the core logic separate from the payload construction. It avoids the “Invalid timezone offset” style errors by ensuring the API receives a predictable, flattened string for evaluation.
Also, double-check that the custom attribute exists in the specific interaction type you are targeting. If the schema doesn’t include it for that specific interaction type (e.g., voice vs. digital), the API will reject the expression even if the syntax is perfect. This is a common gotcha when moving flows between environments with different attribute schemas.
This looks like a serialization mismatch in the conditional-group payload. The API often rejects nested expression types when the JSON structure doesn’t align with the strict schema expected by the Architect engine.
Verify that the interaction object references are fully qualified. Using an intermediate JSON validation tool before the Terraform apply step helps catch these structural discrepancies early, preventing unnecessary 400 Bad Request failures during deployment.
you need to check the json structure for the conditional group. the api is strict about nested objects. try validating the payload with a tool before terraform apply. we saw similar issues with interaction attributes during load tests. make sure the syntax matches the architect schema exactly.