Bar chart only shows first dataset when rendering batch API response (react-chartjs-2 + React)

[Biimaal]

Description:

I'm building a Shariah Compliance Investment Dashboard using React and react-chartjs-2. I fetch stock data in batch from an API. The response returns valid financial ratio data for each ticker. The console log confirms all tickers are processed. However, the Bar chart only shows the dataset for the first ticker.

Expected:

All tickers from the batch should display as individual datasets on the bar chart.

What I've tried:

• Confirmed API returns valid JSON for all tickers
• Used .map() to build datasets dynamically
• Checked console logs for dataset structure
• Tried restructuring the datasets format but no luck

Relevant Code Snippet:

// Example of how I build chart datasets from API response
const financialData = Object.entries(complianceData).map(([symbol, details]) => ({
label: ${symbol} Financial Ratios,
data: [
details.financial_health_ratios["Current Ratio"],
details.financial_health_ratios["Debt-to-Equity Ratio"],
details.financial_health_ratios["Profit Margin"],
details.financial_health_ratios["Return on Equity"]
],
backgroundColor: 'rgba(75, 192, 192, 0.6)',
}));

// In JSX
<Bar
data={{
labels: ["Current Ratio", "Debt-to-Equity Ratio", "Profit Margin", "Return on Equity"],
datasets: financialData
}}
options={{ responsive: true }}
/>

Sample:

• API Response (truncated or example)
• console.log(dataset)
• Screenshot of chart rendering
  
  
  

[manimovassagh]

The issue is that all your datasets share the same backgroundColor. Chart.js renders them, but they overlap visually because they are the same color, making it look like only the first one appears.

Assign a different color to each dataset:

const colors = [
  "rgba(75, 192, 192, 0.6)",
  "rgba(255, 99, 132, 0.6)",
  "rgba(54, 162, 235, 0.6)",
  "rgba(255, 206, 86, 0.6)",
  "rgba(153, 102, 255, 0.6)",
];

const financialData = Object.entries(complianceData).map(([symbol, details], index) => ({
  label: `${symbol} Financial Ratios`,
  data: [
    details.financial_health_ratios["Current Ratio"],
    details.financial_health_ratios["Debt-to-Equity Ratio"],
    details.financial_health_ratios["Profit Margin"],
    details.financial_health_ratios["Return on Equity"]
  ],
  backgroundColor: colors[index % colors.length],
}));

A few other things to verify:

1. Make sure complianceData actually has multiple entries by the time the chart renders. If it is populated asynchronously, the chart might render before the data arrives. With react-chartjs-2, pass the data as props and it should re-render when state changes — but double-check that the state update triggers properly.

2. Looking at your console screenshot, confirm that financialData has length > 1 before passing it to the <Bar> component.

3. If bars are grouped side-by-side (the default for non-stacked), you should see them once the colors differ. If you actually want them stacked, set options.scales.x.stacked: true and options.scales.y.stacked: true.