The use of el-tree requires that you can click on each administrative area to find out the area inside.
< el-tree
:data="dataTree"
show-checkbox
node-key="districtId"
:default-expanded-keys="["-1"]"
:default-checked-keys="["2540102"]"
:props="defaultProps"
@node-click="handleNodeClick"
>
< / el-tree >
I can only achieve that when I load the first level, what I get is equal to dataTree, and then I click to get dataTree, but I will not insert the newly found data into the corresponding node in the data queried for the first time
how should I use this el-tree? query the expansion node, this data is not all found at once, but the point node is queried
.
answer angrily. I did this last month.
< H2 > be sure to distinguish whether it is the first query and whether it is a leaf node. < / H2 >
it took a long time to figure out the problem at that time.
<el-tree
:props="treeProps"
:load="loadNode"
node-key="id"
ref="tree"
:expand-on-click-node="false"
highlight-current
:render-content="renderContent"
default-expand-all
@node-click="handleNodeClick"
lazy>
</el-tree>
getManageList(node,resolve,initFirst) {
let params = {};
if (node && node.data) {
params.unitId = node.data.id;
}
this.$http.get('/v1/workunit/list/managed/straight',{params: params})
.then((res) => {
if (res.data.code === 0) {
let temp = [];
if (initFirst) {
temp.push({
name: res.data.data.parent.unitName,
id: res.data.data.parent.id,
isLeaf: res.data.data.children.length < 1
});
resolve(temp);
} else {
let children = [];
res.data.data.children.map(item => {
children.push({
name: item.unitName,
id: item.id,
isLeaf: !item.hasChildren
});
});
resolve(children);
}
}
});
},
loadNode(node, resolve) {
if (node.level === 0) {
this.getManageList(node,resolve,true);
} else if (node.level >= 1) {
this.getManageList(node,resolve);
}
},
this.options.forEach((val, key) => {
if (!val.children) {
this.$set(val, 'children', [])
}
})
first you need to have an array of children, and then when you click, you can get index, and push in the corresponding children
.
the correct answer on the first floor can be loaded lazily
