Automation Data Is Missing Between Two Apps: How to Trace the Full Data Flow
When data is missing between two apps, the source has the record but the destination does not. The sync ran but the data did not arrive. The break is somewhere in the flow between the source record and the destination record. Trace the full path to find where the value exists on one side and is absent on the other.
Table of Contents
- 01.The full data flow
- 02.What to check first
- 03.Did the trigger fire for the change
- 04.Is the field in the payload
- 05.Field mapping problems
- 06.Required fields and null values
- 07.Permissions and field access
- 08.How to test it
The full data flow
Data moves from a source record through a trigger, a payload, an integration, field mapping and a destination record. Missing data means the value existed at one stage and was absent at the next. Unlike a delay, the data never arrives. The question is which stage dropped it.
| Stage | What to check | How to confirm |
|---|---|---|
| Source record | Value exists in the source | Open the source record and check the field |
| Trigger | Trigger fired for the change | Check the automation history for an entry |
| Payload | Field included in the payload | Inspect the webhook or API request body |
| Mapping | Source field maps to destination | Open the field mapping configuration |
| Destination | Field accepts the value | Check the destination field type and permissions |
What to check first
- Confirm the value exists in the source record.
- Check the automation history to see whether the trigger fired.
- Inspect the payload the integration sends for the field and value.
- Open the field mapping and confirm the source maps to the right destination.
- Check the destination field type and whether it accepts the incoming value.
Did the trigger fire for the change
If the source has the value but the destination does not, first confirm the trigger fired. Open the automation history and look for an entry after the source change. If there is no entry, the trigger did not detect the change. This can happen when the trigger watches the wrong event, the change was made in a way the trigger does not monitor or the trigger is inactive. A missing trigger entry means the data never started its journey.
Is the field in the payload
If the trigger fired, inspect the payload the integration sends. The field may be absent from the payload if the source does not include it in the event data. Some triggers send a limited payload that omits certain fields, requiring a follow-up API call to fetch the full record. If the field is not in the payload, the mapping has nothing to work with. Confirm the payload includes the field or configure the integration to fetch the full record.
Field mapping problems
Even when the payload has the value, the mapping can drop it. A source field mapped to the wrong destination field sends the value somewhere unexpected. A field name mismatch between the payload and the mapping leaves the value unmapped. Open the mapping and confirm each source field points to the intended destination. Field mapping is covered in detail in the guide on webhook data mapping wrong.
Required fields and null values
The destination may reject the value if a required field is missing or the value is null when a non-null is expected. Some APIs silently reject records that fail validation, so the record never appears in the destination. Check the integration logs for validation errors. If the source value is empty, the destination may need a default or the source needs to capture the field. Handling empty fields safely is covered in the guide on automation fails when a field is empty.
Permissions and field access
The connected account may lack permission to read the source field or write the destination field. A value that exists in the source may not be included in the payload if the integration's token lacks read access. A value that arrives at the destination may not be written if the token lacks write access. Confirm the connected account has the required permissions for both the source and destination fields.
How to test it
- 1.Confirm the value exists in the source record.
- 2.Check the automation history for a trigger entry after the change.
- 3.Inspect the payload for the field and value.
- 4.Open the mapping and confirm the source maps to the right destination.
- 5.Check the destination field type, permissions and any validation errors.
- 6.Fix the trigger, payload, mapping or permissions and resync.
Frequently Asked Questions
Why is data missing between my two connected apps?
The trigger may not have fired, the field may be absent from the payload, the mapping may send the value to the wrong destination or the destination may have rejected the value. Trace the value through each stage to find where it drops.
How do I find where my sync drops data?
Confirm the value exists in the source, check the automation history for a trigger entry, inspect the payload for the field, review the mapping and check the destination for validation or permission errors. The stage where the value disappears is the problem.
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