feat: Add Bubble chart migration logic

superset-frontend/plugins/plugin-chart-echarts/src/Bubble/transformProps.ts

@@ -104,7 +104,7 @@ export default function transformProps(chartProps: EchartsBubbleChartProps) {
 
   const colorFn = CategoricalColorNamespace.getScale(colorScheme as string);
 
-  const legends: string[] = [];
+  const legends = new Set<string>();
   const series: ScatterSeriesOption[] = [];
 
   const xAxisLabel: string = getMetricLabel(x);
@@ -114,9 +114,8 @@ export default function transformProps(chartProps: EchartsBubbleChartProps) {
   const refs: Refs = {};
 
   data.forEach(datum => {
-    const name =
-      ((bubbleSeries ? datum[bubbleSeries] : datum[entity]) as string) ||
-      NULL_STRING;
+    const dataName = bubbleSeries ? datum[bubbleSeries] : datum[entity];
+    const name = dataName ? String(dataName) : NULL_STRING;
     const bubbleSeriesValue = bubbleSeries ? datum[bubbleSeries] : null;
 
     series.push({
@@ -133,7 +132,7 @@ export default function transformProps(chartProps: EchartsBubbleChartProps) {
       type: 'scatter',
       itemStyle: { color: colorFn(name), opacity },
     });
-    legends.push(name);
+    legends.add(name);
   });
 
   normalizeSymbolSize(series, maxBubbleSize);
@@ -196,7 +195,7 @@ export default function transformProps(chartProps: EchartsBubbleChartProps) {
     },
     legend: {
       ...getLegendProps(legendType, legendOrientation, showLegend, theme),
-      data: legends,
+      data: Array.from(legends),
     },
     tooltip: {
       show: !inContextMenu,

superset/cli/viz_migrations.py

@@ -25,6 +25,7 @@
 
 class VizType(str, Enum):
     AREA = "area"
+    BUBBLE = "bubble"
     DUAL_LINE = "dual_line"
     LINE = "line"
     PIVOT_TABLE = "pivot_table"
@@ -76,6 +77,7 @@ def migrate(viz_type: VizType, is_downgrade: bool = False) -> None:
     # pylint: disable=import-outside-toplevel
     from superset.migrations.shared.migrate_viz.processors import (
         MigrateAreaChart,
+        MigrateBubbleChart,
         MigrateDualLine,
         MigrateLineChart,
         MigratePivotTable,
@@ -85,6 +87,7 @@ def migrate(viz_type: VizType, is_downgrade: bool = False) -> None:
 
     migrations = {
         VizType.AREA: MigrateAreaChart,
+        VizType.BUBBLE: MigrateBubbleChart,
         VizType.DUAL_LINE: MigrateDualLine,
         VizType.LINE: MigrateLineChart,
         VizType.PIVOT_TABLE: MigratePivotTable,

superset/migrations/shared/migrate_viz/processors.py

@@ -184,3 +184,32 @@ def _pre_action(self) -> None:
         )
 
         self.data["opacity"] = 0.7
+
+
+class MigrateBubbleChart(MigrateViz):
+    source_viz_type = "bubble"
+    target_viz_type = "bubble_v2"
+    rename_keys = {
+        "bottom_margin": "x_axis_title_margin",
+        "left_margin": "y_axis_title_margin",
+        "limit": "row_limit",
+        "x_axis_format": "xAxisFormat",
+        "x_log_scale": "logXAxis",
+        "x_ticks_layout": "xAxisLabelRotation",
+        "y_axis_showminmax": "truncateYAxis",
+        "y_log_scale": "logYAxis",
+    }
+    remove_keys = {"x_axis_showminmax"}
+
+    def _pre_action(self) -> None:
+        bottom_margin = self.data.get("bottom_margin")
+        if self.data.get("x_axis_label") and (
+            not bottom_margin or bottom_margin == "auto"
+        ):
+            self.data["bottom_margin"] = 30
+
+        if x_ticks_layout := self.data.get("x_ticks_layout"):
+            self.data["x_ticks_layout"] = 45 if x_ticks_layout == "45°" else 0
+
+        # Truncate y-axis by default to preserve layout
+        self.data["y_axis_showminmax"] = True

tests/unit_tests/migrations/viz/nvd3_bubble_chart_to_echarts_test.py

@@ -0,0 +1,76 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+from typing import Any
+
+from superset.migrations.shared.migrate_viz import MigrateBubbleChart
+from tests.unit_tests.migrations.viz.utils import migrate_and_assert
+
+SOURCE_FORM_DATA: dict[str, Any] = {
+    "adhoc_filters": [],
+    "bottom_margin": 20,
+    "color_scheme": "default",
+    "entity": "count",
+    "left_margin": 20,
+    "limit": 100,
+    "max_bubble_size": 50,
+    "series": ["region"],
+    "show_legend": True,
+    "size": 75,
+    "viz_type": "bubble",
+    "x": "year",
+    "x_axis_format": "SMART_DATE",
+    "x_axis_label": "Year",
+    "x_axis_showminmax": True,
+    "x_log_scale": True,
+    "x_ticks_layout": "45°",
+    "y": "country",
+    "y_axis_bounds": [0, 100],
+    "y_axis_format": "SMART_DATE",
+    "y_axis_label": "Year",
+    "y_axis_showminmax": False,
+    "y_log_scale": True,
+}
+
+TARGET_FORM_DATA: dict[str, Any] = {
+    "adhoc_filters": [],
+    "color_scheme": "default",
+    "entity": "count",
+    "form_data_bak": SOURCE_FORM_DATA,
+    "logXAxis": True,
+    "logYAxis": True,
+    "max_bubble_size": 50,
+    "row_limit": 100,
+    "series": ["region"],
+    "show_legend": True,
+    "size": 75,
+    "truncateYAxis": True,
+    "viz_type": "bubble_v2",
+    "x": "year",
+    "xAxisFormat": "SMART_DATE",
+    "xAxisLabelRotation": 45,
+    "x_axis_label": "Year",
+    "x_axis_title_margin": 20,
+    "y": "country",
+    "y_axis_bounds": [0, 100],
+    "y_axis_format": "SMART_DATE",
+    "y_axis_label": "Year",
+    "y_axis_title_margin": 20,
+}
+
+
+def test_migration() -> None:
+    migrate_and_assert(MigrateBubbleChart, SOURCE_FORM_DATA, TARGET_FORM_DATA)