GitHub user dosubot[bot] added a comment to the discussion: Warm up charts 
cache via API

<!-- Answer -->
Yes, you can create a chart with `query_context` in a **single API call** — no 
need to create first and update later.

The 
[ChartPostSchema](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/charts/schemas.py#L167-L226)
 accepts [`query_context` as an optional 
field](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/charts/schemas.py#L86-L90)
 during chart creation:

```python
POST /api/v1/chart/
{
    "slice_name": "My Chart",
    "datasource_id": 1,
    "datasource_type": "table",
    "viz_type": "table",
    "params": "{...}",  # your form_data as JSON string
    "query_context": "{...}"  # your query_context as JSON string
}
```

So your workflow can be:
1. Build your `params` (form_data) and `query_context` JSON strings
2. Create the chart with both in one POST request
3. Then `warm_up_cache` will work immediately since `query_context` is already 
stored


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GitHub link: 
https://github.com/apache/superset/discussions/38718#discussioncomment-16207244

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