Multiple delete in nodejs mysql using checkboxes - mysql

Question

How do you perform multiple delete in nodeJs MySql? Where I need to check check-boxes to select the id's to be deleted in my blogger form.
front end
<% for(var i = 0 ; i < data.length ; i++) { %>
</td>
<td> <%= data[i].catname %> </td>
<td> <%= data[i].status %> </td>
<td> <%= data[i].id %> </td>
<td> delete</td>
<td> view</td>
<td> update</td>
<td> <input type="checkbox" name="check[]" value="data[i].id">delete <%=data[i].id %> </td>
<!-- making checkboxes -->
</tr>
back-end
app.post('/deletechecks',function(req,res){
var ch= req.body.check;
console.log(ch);
for(i=0;i<ch.length;i++)
{
var h= "delete from mydata where id='"+ch[i]+"''";
con.query(h,function(err,result){
if(submit==deleteselected)
{
console.log("deleted");
}
});
}
res.redirect('/viewdata');
});p.s i dont know what to do after this.

Answer 1

So hi there it's bit late while I am answering this .
So same situation I was there but the DB I was using was Mongo.
In my case it was a TO-DO list app where the user need to have a functionality of multipple delete so there were checkboxes were provided before the tasks.
I will attach a screenshot also for refernce.
While figuring it what I did I made a form there and first selected all task that I want to mark as done in case first and then hit delete so basically all will be deleted at once .
What happened I added a field 'name' in each task whose value I filled with the ObjectID in DB in order to make it unique OKAY! (As in the home page via EJS i had that info precomputed with me) (By EJS i mean View part or templating engine)
As once the Delete Button would be pressed (basically Submit) button then all these task values would be appended inside req.body (I think this you understad ) so what I did I casted the string values to ObjectID and called delete on the ID's .
So Now I am sending the pic and then code if still any issues in this do ask.
enter image description here The UI that I was talking above that will make things clear
And this is the delete function for reference :
Code:
app.post('/deleteTasks',function(req,resp){
let targetTask = req.body;
console.log('Hello there',targetTask);
let obj = [];
for(itr in targetTask){
const { ObjectId } = require('mongodb');
const _id = ObjectId(itr);
obj.push(_id);
}
console.log(obj);
for(itr of obj){
Task.findByIdAndDelete(itr,function(err){
if(err){
console.log('Error occured ',err.message);
return;
}
});
}
return resp.redirect('back');
});
Hope this can help and you can do some subsequent changes as per your quest .