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Day 245/300 JS foreach data cannot be updated to the object after multi-layer nesting
2022-07-06 06:40:00 【Arden Zhao】
( One ) demand
Add objects and edit objects , The default value of the attribute value under the business scenario should be distinguished , Set different default values .
( Two ) Realization
1、forEach Failed to update data
Try it at first , After getting the asynchronous request , Direct data processing , But it failed , Choose different business scenarios on the other side , Can't update .
- Deep copy of complex object data , I tried. No
- nextTick To the next micro task asynchronous queue , I tried. No
- setTimeout To the next macro task asynchronous queue , Is it OK to try
A slight breakdown of mood , Just not ;
2、 Further investigation
The discovery is after selecting the business scenario , Data will be re assigned ; And choose the old object used by reassignment .
Although I still don't understand it until now , Why? , After data rendering , Still not rendered to the original object , Here's a record of . I'll add later .
this.toolsList.forEach(function (item) {
item.checked= true
if (_this.newState) {
if (item.tool_name === 'other') {
const attributes = item.attributes
attributes.forEach((attr) => {
if (attr.name === 'edit_object_model') {
console.log('attr2', attr)
attr.value = '10'
}
})
}
}
})
Write it at the end
On the way to study , Often slack off
《 There are students who want to learn technology and need supervision ~》
https://mp.weixin.qq.com/s/FyuddlwRY7DsHUejCjiVug
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