fix(data-table): fix cannot click selection checkbox

CHANGELOG.en-US.md

@@ -6,6 +6,7 @@
 
 - Fix `n-switch` can't use keyboard operation when checked value is customized.
 - Fix `n-data-table`'s fixed column is covered by scroll content when placed inside popover.
+- Fix `n-data-table` cannot click selection checkbox if the selection column is a column's child.
 
 ### Feats
 

CHANGELOG.zh-CN.md

@@ -6,6 +6,7 @@
 
 - 修复 `n-switch` 在自定义选中值的时候无法使用键盘操作
 - 修复 `n-data-table` 放在 popover 内使用固定列滚动内容覆盖
+- 修复 `n-data-table` 当 selection column 为某个 column 的子 column 时无法点击全选复选框
 
 ### Feats
 

src/data-table/src/use-table-data.ts

@@ -32,14 +32,20 @@ export function useTableData (
   }
 ) {
   const selectionColumnRef = computed<TableSelectionColumn | null>(() => {
-    return (
-      (props.columns.find((col) => {
-        if (col.type === 'selection') {
-          return true
+    const getSelectionColumn = (
+      cols: typeof props.columns
+    ): TableSelectionColumn | null => {
+      for (let i = 0; i < cols.length; ++i) {
+        const col = cols[i]
+        if ('children' in col) {
+          return getSelectionColumn(col.children)
+        } else if (col.type === 'selection') {
+          return col
         }
-        return false
-      }) as TableSelectionColumn | undefined) || null
-    )
+      }
+      return null
+    }
+    return getSelectionColumn(props.columns)
   })
 
   const treeMateRef = computed(() => {