# \#data-mapping **URL:** https://community.n8n.io/tag/data-mapping/171.md [Latest](https://community.n8n.io/latest.md) · [Categories](https://community.n8n.io/categories.md) · [Tags](https://community.n8n.io/tags.md) --- ## [Map Data in n8n Without Writing Code: Meet the Data Mapper Node](https://community.n8n.io/t/map-data-in-n8n-without-writing-code-meet-the-data-mapper-node/322172)
**Author:** [@SilentJMA](https://community.n8n.io/u/SilentJMA)\ **Replies:** 0\ **Last updated:** [October 17, 2026, 9:54am UTC](https://community.n8n.io/t/map-data-in-n8n-without-writing-code-meet-the-data-mapper-node/322172 "2026-10-17T09:54:21Z")
Almost every integration ends up with the same chore: the data you receive does not look like the data you need to send. The shop’s API calls it customer.name, your ERP wants buyer.name. One system sends quantities as t… --- ## [Array Mapping Issue: How to Create Single Shopify Order with Multiple Line Items](https://community.n8n.io/t/array-mapping-issue-how-to-create-single-shopify-order-with-multiple-line-items/225995)
**Author:** [@endrust](https://community.n8n.io/u/endrust)\ **Replies:** 9\ **Last updated:** [November 28, 2025, 10:18am UTC](https://community.n8n.io/t/array-mapping-issue-how-to-create-single-shopify-order-with-multiple-line-items/225995 "2025-11-28T10:18:02Z")
Describe the problem/error/question: My incoming data contains a single item with an array of line item objects, accessible at {{ $json.line\_items }}. This array contains all the necessary fields (variant\_id, quantity,… --- ## [Feature Request: Native Support for Mapping Arrays into Single API Requests (Without Auto-Splitting)](https://community.n8n.io/t/feature-request-native-support-for-mapping-arrays-into-single-api-requests-without-auto-splitting/227159)
**Author:** [@endrust](https://community.n8n.io/u/endrust)\ **Replies:** 0\ **Last updated:** [November 26, 2025, 10:29pm UTC](https://community.n8n.io/t/feature-request-native-support-for-mapping-arrays-into-single-api-requests-without-auto-splitting/227159 "2025-11-26T22:29:29Z")
The idea is: Add native support in n8n to map arrays into nested request fields without automatically splitting executions. Users should be able to: Map array fields into request bodies as-is Control whether arrays sh… --- ## [Data Handling Design in n8n Workflows](https://community.n8n.io/t/data-handling-design-in-n8n-workflows/192508)
**Author:** [@Aaron\_Gathrid](https://community.n8n.io/u/Aaron_Gathrid)\ **Replies:** 0\ **Last updated:** [September 23, 2025, 4:10am UTC](https://community.n8n.io/t/data-handling-design-in-n8n-workflows/192508 "2025-09-23T04:10:07Z")
Would love some advice on data handling in my workflow - I have a lot of moving parts, and no clean solution to provide the proper data to the following nodes without a bunch of ‘set fields’ and ‘aggregates.’ You can see… --- ## [Convert json array values into complete key-value pairs](https://community.n8n.io/t/convert-json-array-values-into-complete-key-value-pairs/105883)
**Author:** [@Omid](https://community.n8n.io/u/Omid)\ **Replies:** 1\ **Last updated:** [April 25, 2025, 5:41am UTC](https://community.n8n.io/t/convert-json-array-values-into-complete-key-value-pairs/105883 "2025-04-25T05:41:01Z")
Hi all, I’m a newbie here. I’m working with a HTTP request node that produces results in a format that I believe is not optimal for ChatGPT to recognize or work-with. For example, the data comes out as follows: \[ { … --- ## [My fields are not being mapped correctly](https://community.n8n.io/t/my-fields-are-not-being-mapped-correctly/74493)
**Author:** [@Renveer\_Ramsaha](https://community.n8n.io/u/Renveer_Ramsaha)\ **Replies:** 2\ **Last updated:** [February 12, 2025, 7:42pm UTC](https://community.n8n.io/t/my-fields-are-not-being-mapped-correctly/74493 "2025-02-12T19:42:56Z")
My fields are not being mapped correctly I’m having trouble mapping fields correctly in my n8n workflow. My workflow retrieves data from a Google Sheet, processes it using multiple AI agents, and then writes the manipula… --- ## [PostgreSQL Node - Issue with JSONB\[\] Data Type Handling](https://community.n8n.io/t/postgresql-node-issue-with-jsonb-data-type-handling/67216)
**Author:** [@Burak\_Bayraktaroglu](https://community.n8n.io/u/Burak_Bayraktaroglu)\ **Replies:** 3\ **Last updated:** [December 24, 2024, 10:10pm UTC](https://community.n8n.io/t/postgresql-node-issue-with-jsonb-data-type-handling/67216 "2024-12-24T22:10:26Z")
Hey n8n community, I’m encountering an issue with the PostgreSQL node when trying to insert or update data into a jsonb\[\] column. Here’s the situation: What I’m Trying to Achieve: I have a column named assets in my P… --- ## [LangChain Chat Memory vs App Data](https://community.n8n.io/t/langchain-chat-memory-vs-app-data/62983)
**Author:** [@jeffscottward](https://community.n8n.io/u/jeffscottward)\ **Replies:** 5\ **Last updated:** [November 26, 2024, 1:44am UTC](https://community.n8n.io/t/langchain-chat-memory-vs-app-data/62983 "2024-11-26T01:44:19Z")
AI Chat Memory + App Data Question: ————————————————- I see there are a few options for a plug+play chat memory node that hooks into the LangChain AI node. Some of the options include Redis Postgres and more I’m t… --- ## [No map function in Set/IF nodes](https://community.n8n.io/t/no-map-function-in-set-if-nodes/31245)
**Author:** [@barn4k](https://community.n8n.io/u/barn4k)\ **Replies:** 3\ **Last updated:** [October 6, 2023, 12:42pm UTC](https://community.n8n.io/t/no-map-function-in-set-if-nodes/31245 "2023-10-06T12:42:37Z")
Describe the problem/error/question I’m wondering why the map function is not working in the Set/IF and other nodes that use expressions. What is the error message (if any)? Invalid syntax :frowning: Please share your … --- ## [UI: Using Set/Rename Nodes With Large JSON Objects](https://community.n8n.io/t/ui-using-set-rename-nodes-with-large-json-objects/18560)
**Author:** [@barnesew](https://community.n8n.io/u/barnesew)\ **Replies:** 3\ **Last updated:** [October 11, 2022, 6:26pm UTC](https://community.n8n.io/t/ui-using-set-rename-nodes-with-large-json-objects/18560 "2022-10-11T18:26:04Z")
One area I feel like could be improved is the UI/UX around the set and rename nodes specifically when dealing with larger JSON objects. Say I make an HTTP GET request that returns a JSON body with 30-40 fields and I nee… --- ## [Data Mapping - Instruction Video for Multiple Elements in Table](https://community.n8n.io/t/data-mapping-instruction-video-for-multiple-elements-in-table/16304)
**Author:** [@spessex](https://community.n8n.io/u/spessex)\ **Replies:** 0\ **Last updated:** [August 3, 2022, 3:19pm UTC](https://community.n8n.io/t/data-mapping-instruction-video-for-multiple-elements-in-table/16304 "2022-08-03T15:19:30Z")
I realise we have Data mapping - n8n Documentation but it would be great to have a slightly more in depth instructional video on how to use it, ‘particularly’ when the table has multiple elements to drag in. For example … --- ## [Data Mapping - Dragging Table Headings Not Working](https://community.n8n.io/t/data-mapping-dragging-table-headings-not-working/16277)
**Author:** [@spessex](https://community.n8n.io/u/spessex)\ **Replies:** 5\ **Last updated:** [August 3, 2022, 9:52am UTC](https://community.n8n.io/t/data-mapping-dragging-table-headings-not-working/16277 "2022-08-03T09:52:22Z")
I’m on the latest ‘stable’ cloud version of n8n and can’t appear to drag ad drop table headings for data mapping purposes as it shows in Data mapping - n8n Documentation Table headings are always greyed out and no matte…