Do not attempt to render budget graph when no data available

sstreasury/static/sstreasury/budget.js

@@ -156,52 +156,56 @@ function makeGrid() {
 function makeCharts() {
 	// Display expense, revenue charts on budget view page
 	
-	new Chart(document.getElementById('chartExpenses'), {
+	if (document.getElementById('chartExpenses')) {
-		type: 'pie',
+		new Chart(document.getElementById('chartExpenses'), {
-		data: {
+			type: 'pie',
-			labels: expense_data.map(e => e['Description']),
+			data: {
-			datasets: [{
+				labels: expense_data.map(e => e['Description']),
-				label: 'Expenses',
+				datasets: [{
-				data: expense_data.map(e => e['Unit price'] * e['Units'])
+					label: 'Expenses',
-			}]
+					data: expense_data.map(e => e['Unit price'] * e['Units'])
-		},
+				}]
-		options: {
+			},
-			plugins: {
+			options: {
-				tooltip: {
+				plugins: {
-					callbacks: {
+					tooltip: {
-						label: i => '$' + i.parsed.toFixed(2)
+						callbacks: {
+							label: i => '$' + i.parsed.toFixed(2)
+						}
 					}
 				}
-			}
-		},
-	});
-	
-	new Chart(document.getElementById('chartRevExp'), {
-		type: 'bar',
-		data: {
-			labels: ['Revenue', 'Expenses'],
-			datasets: [{
-				label: 'Budget',
-				data: [revTotal - revTotalIWT, (expTotal * (1 + emergency_fund_mult))],
-				backgroundColor: ['#36a2eb', '#ff6384']
-			}]
-		},
-		options: {
-			scales: {
-				y: {
-					beginAtZero: true
-				}
 			},
-			plugins: {
+		});
-				legend: {
+	}
-					display: false
+	
+	if (document.getElementById('chartRevExp')) {
+		new Chart(document.getElementById('chartRevExp'), {
+			type: 'bar',
+			data: {
+				labels: ['Revenue', 'Expenses'],
+				datasets: [{
+					label: 'Budget',
+					data: [revTotal - revTotalIWT, (expTotal * (1 + emergency_fund_mult))],
+					backgroundColor: ['#36a2eb', '#ff6384']
+				}]
+			},
+			options: {
+				scales: {
+					y: {
+						beginAtZero: true
+					}
 				},
-				tooltip: {
+				plugins: {
-					callbacks: {
+					legend: {
-						label: i => '$' + i.parsed.y.toFixed(2)
+						display: false
+					},
+					tooltip: {
+						callbacks: {
+							label: i => '$' + i.parsed.y.toFixed(2)
+						}
 					}
 				}
-			}
+			},
-		},
+		});
-	});
+	}
 }