Fixed #424 - Duplicate keys in TreeTable

src/components/treetable/TreeTableRow.vue

@@ -1,6 +1,6 @@
 <template>
     <tr :class="containerClass" @click="onClick" @keydown="onKeyDown" @touchend="onTouchEnd" :style="node.style" tabindex="0">
-        <td v-for="(col,i) of columns" :key="node.key + '_' + col.columnKey||col.field||i" :style="col.bodyStyle" :class="col.bodyClass">
+        <td v-for="(col,i) of columns" :key="col.columnKey||col.field||i" :style="col.bodyStyle" :class="col.bodyClass">
             <button type="button" class="p-treetable-toggler p-link" @click="toggle" v-if="col.expander" :style="togglerStyle" tabindex="-1" v-ripple>
                 <i :class="togglerIcon"></i>
             </button>

src/components/treetable/TreeTableRowLoader.vue

@@ -31,6 +31,7 @@ const TreeTableRowLoader = {
     },
     render(createElement, context) {
         const root = createElement(TreeTableRow, {
+            key: context.props.node.key,
             props: context.props,
             on: {
                 'node-toggle': context.listeners['node-toggle'],
@@ -51,6 +52,7 @@ const TreeTableRowLoader = {
                 childNodeProps.level = context.props.level + 1;
 
                 let childNodeElement = createElement(TreeTableRowLoader, {
+                    key: childNode.key,
                     props: childNodeProps,
                     on: {
                         'node-toggle': context.listeners['node-toggle'],