echarts-chart-renderer-flat-row-shape-assumption

The ChartRenderer multi-series ECharts option builder in R-Dash assumes Cube query results arrive as flat [{x, y, series}] rows. This shape matches Cube’s pivot output for simple measures but has not been tested against real Cube.js responses with multiple dimensions, time dimensions, or granularity settings. Validate actual Cube response shapes before marking Chart visualization production-ready.

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