Step 4
Data Mapping
Renamed Standardize data — cleanses the raw dummyjson shape into our own field names, applies a couple of transforms, and derives one new field.
Only listed fields survive
In default (rule-based) mode, Data Mapping builds a brand-new output object containing only the fields listed in
dataMappings. Anything not explicitly listed is silently dropped — nothing is auto-carried through. (dataMappingMode: "passthrough" copies the whole record verbatim instead, but then none of your renames/transforms apply — it's all-or-nothing.) That's why the mapping below lists every field from the product record, not just the ones being renamed.
Configuration
dataMappingMode: left on default (rule-based mapping).
| sourceField | targetField | transform |
|---|---|---|
| id | productId | — |
| title | productName | uppercase |
| description | description | — |
| category | category | — |
| price | price | — |
| discountPercentage | discountPercent | — |
| rating | rating | — |
| stock | inStockQty | — |
| tags | tags | — |
| brand | brand | — |
| sku | sku | — |
| weight | weight | — |
| dimensions | dimensions | — |
| warrantyInformation | warrantyInformation | — |
| shippingInformation | shippingInformation | — |
| availabilityStatus | availabilityStatus | — |
| reviews | reviews | — |
| returnPolicy | returnPolicy | — |
| minimumOrderQuantity | minimumOrderQuantity | — |
| meta | meta | — |
| images | images | — |
| thumbnail | thumbnail | — |
| category (reused) | summary | expression: item.category + ': ' + item.title |
The last row reuses category as the source for a derived field (summary) — a rule's sourceField doesn't have to be unique across rules.
Before / After — Product 1
Before:
{ "id": 1, "title": "Essence Mascara Lash Princess", "discountPercentage": 10.48, "stock": 99, "category": "beauty" }After:
{
"productId": 1,
"productName": "ESSENCE MASCARA LASH PRINCESS",
"discountPercent": 10.48,
"inStockQty": 99,
"category": "beauty",
"summary": "beauty: Essence Mascara Lash Princess",
"...": "...(every other field carried through under its original name)"
}