aminghadersohi opened a new pull request, #38403:
URL: https://github.com/apache/superset/pull/38403
### SUMMARY
Add support for creating Big Number charts via the MCP service. This enables
AI assistants to create single-metric display charts with two variants:
- **big_number_total**: A standalone big number display showing a single
metric value
- **big_number** (with trendline): A big number with a time-series trendline
below it
The implementation includes:
- `BigNumberChartConfig` Pydantic schema with validators for metric
aggregates and trendline requirements
- `map_big_number_config()` for converting simplified config to Superset's
form_data format
- `_resolve_viz_type()` helper for centralized viz_type resolution across
chart types
- Pre-validation in `SchemaValidator` with user-friendly error messages and
codes
- Updated MCP instructions to document the new chart type
Supported features:
- Metric with required aggregate function (SUM, COUNT, AVG, MIN, MAX)
- Optional trendline with temporal column and time grain
- Subheader text, number formatting (y_axis_format), and period comparison
(compare_lag)
- Filter support
### BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF
N/A - Backend MCP service changes only
### TESTING INSTRUCTIONS
1. Run the new test suite:
```bash
pytest tests/unit_tests/mcp_service/chart/test_big_number_chart.py -v
```
2. Run the full MCP service test suite to verify no regressions:
```bash
pytest tests/unit_tests/mcp_service/ -x -q
```
3. Test via MCP client:
- Create a big number total: `generate_chart(dataset_id=1,
config={"chart_type": "big_number", "metric": {"name": "revenue", "aggregate":
"SUM"}})`
- Create a big number with trendline: `generate_chart(dataset_id=1,
config={"chart_type": "big_number", "metric": {"name": "revenue", "aggregate":
"SUM"}, "temporal_column": "ds", "show_trendline": true})`
### ADDITIONAL INFORMATION
- [x] Introduces new feature or API
- [ ] Has associated issue:
- [ ] Required feature flags:
- [ ] Changes UI
- [ ] Includes DB Migration
- [ ] Removes existing feature or API
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