Dropdown list configuration

Oct 13, 2025 by wbrum.org 124 views

BUG: Dropdown list (multi-choice) on node form not passing selected values to next node

Problem Description

We are experiencing an issue with a Dropdown list (multi-choice) on a node form in n8n. The selected values are not being passed to the next node, which is causing problems in our workflow. This issue was working fine yesterday, but today it stopped working.

Workflow and Screenshots

To better understand the issue, let's take a look at the workflow and the node configuration.

{
  "nodes": [
    {
      "parameters": {
        "formTitle": "Formulário",
        "formDescription": "Selecionar números",
        "formFields": {
          "values": [
            {
              "fieldLabel": "Selecione o número:",
              "fieldType": "dropdown",
              "fieldOptions": {
                "values": [
                  {
                    "option": "1"
                  },
                  {
                    "option": "2"
                  },
                  {
                    "option": "3"
                  }
                ]
              },
              "multiselect": true,
              "requiredField": true
            }
          ]
        },
        "options": {
          "buttonLabel": "Selecionar"
        }
      },
      "type": "n8n-nodes-base.formTrigger",
      "typeVersion": 2.2,
      "position": [
        1180,
        -120
      ],
      "id": "5a8aa9fd-646d-4c0f-a362-99eecb673272",
      "name": "On form submission1",
      "webhookId": "87c94725-3721-43d8-a9ae-71c19da18bd9"
    }
  ],
  "connections": {
    "On form submission1": {
      "main": [
        []
      ]
    }
  },
  "pinData": {},
  "meta": {
    "templateCredsSetupCompleted": true,
    "instanceId": "b7e22da359639f89c4cf4d87818e620b1e1bc9e4641d3f11e758a1749713cf1e"
  }
}

Output Returned by the Last Node

The output returned by the last node is as follows:

[
  {
    "Selecione o número:": null,
    "submittedAt": "2025-03-13T15:19:38.100-04:00",
    "formMode": "test"
  }
]

Debug Information

Here is the debug information:

core

n8nVersion: 1.82.3
platform: docker (self-hosted)
nodeJsVersion: 20.18.3
database: postgres
executionMode: regular
concurrency: -1
license: community

storage

success: all
error: all
progress: false
manual: true
binaryMode: memory

pruning

enabled: true
maxAge: 336 hours
maxCount: 10000 executions

client

userAgent: mozilla/5.0 (windows nt 10.0; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/134.0.0.0 safari/537.36
isTouchDevice: false

Possible Causes and Solutions

After analyzing the workflow and the debug information, we can identify a few possible causes for this issue:

Dropdown list configuration: The dropdown list is configured to allow multiple selections, but the selected values are not being passed to the next node. This could be due to a misconfiguration of the dropdown list or a bug in the n8n platform.
Node configuration: The node configuration might be causing the issue. The node is set to trigger on form submission, but the selected values are not being passed to the next node.
n8n platform issue: There might be an issue with the n8n platform that is causing the selected values to not be passed to the next node.

To solve this issue, we can try the following:

Check the dropdown list configuration: Verify that the dropdown list is configured correctly and that the selected values are being passed to the next node.
Check the node configuration: Verify that the node is configured correctly and that the selected values are being passed to the next node.
Update n8n platform: Update the n8n platform to the latest version to see if the issue is resolved.

Conclusion

In conclusion, the issue with the dropdown list (multi-choice) on the node form not passing selected values to the next node is a complex problem that requires a thorough analysis of the workflow and the debug information. By identifying the possible causes and solutions, we can try to resolve the issue and get the workflow working again.

Recommendations

Based on the analysis, we recommend the following:

Verify the dropdown list configuration: Verify that the dropdown list is configured correctly and that the selected values are being passed to the next node.
Verify the node configuration: Verify that the node is configured correctly and that the selected values are being passed to the next node.
Update n8n platform: Update the n8n platform to the latest version to see if the issue is resolved.

By following these recommendations, we can try to resolve the issue and get the workflow working again.

Future Work

In the future, we can try to:

Improve the dropdown list configuration: Improve the dropdown list configuration to make it more robust and reliable.
Improve the node configuration: Improve the node configuration to make it more robust and reliable.
Investigate n8n platform issues: Investigate any issues with the n8n platform that might be causing the selected values to not be passed to the next node.

By doing this, we can make the workflow more reliable and efficient, and reduce the likelihood of issues like this occurring in the future.
Q&A: Dropdown list (multi-choice) on node form not passing selected values to next node

Q: What is the issue with the dropdown list (multi-choice) on the node form?

A: The issue is that the selected values are not being passed to the next node, causing problems in the workflow.

Q: What are the possible causes of this issue?

A: The possible causes of this issue are:

Dropdown list configuration: The dropdown list is configured to allow multiple selections, but the selected values are not being passed to the next node.
Node configuration: The node configuration might be causing the issue. The node is set to trigger on form submission, but the selected values are not being passed to the next node.
n8n platform issue: There might be an issue with the n8n platform that is causing the selected values to not be passed to the next node.

Q: How can I verify the dropdown list configuration?

A: To verify the dropdown list configuration, follow these steps:

Check the dropdown list options: Verify that the dropdown list options are correctly configured and that the selected values are being passed to the next node.
Check the dropdown list settings: Verify that the dropdown list settings are correctly configured and that the selected values are being passed to the next node.
Check the node configuration: Verify that the node configuration is correctly configured and that the selected values are being passed to the next node.

Q: How can I verify the node configuration?

A: To verify the node configuration, follow these steps:

Check the node settings: Verify that the node settings are correctly configured and that the selected values are being passed to the next node.
Check the node connections: Verify that the node connections are correctly configured and that the selected values are being passed to the next node.
Check the node output: Verify that the node output is correctly configured and that the selected values are being passed to the next node.

Q: How can I update the n8n platform?

A: To update the n8n platform, follow these steps:

Check the n8n platform version: Verify that the n8n platform version is up-to-date.
Update the n8n platform: Update the n8n platform to the latest version.
Verify the update: Verify that the update has resolved the issue.

Q: What are the benefits of updating the n8n platform?

A: The benefits of updating the n8n platform are:

Improved reliability: Updating the n8n platform can improve the reliability of the workflow and reduce the likelihood of issues like this occurring in the future.
Improved efficiency: Updating the n8n platform can improve the efficiency of the workflow and reduce the time it takes to complete tasks.
Improved security: Updating the n8n platform can improve the security of the workflow and reduce the risk of data breaches.

Q: What are the next steps to resolve this issue?

A: The next steps to resolve this issue are:

Verify the dropdown list configuration: Verify that the dropdown list configuration is correct and that the selected values are being passed to the next node.
Verify the node configuration: Verify that the node configuration is correct and that the selected values are being passed to the next node.
Update the n8n platform: Update the n8n platform to the latest version and verify that the issue is resolved.

By following these steps, we can resolve the issue and get the workflow working again.