entry.find(function(err,user){
for(var i=0;i<user.length;i++){
if(user[i].tablenumber==-1){
assigntable(user[i]);
}
}
});
In this code snippet, the goal is to ensure that each iteration of the for loop completes before invoking the asynchronous `assigntable` function. The purpose of `assigntable` is to modify the database by utilizing a callback function. However, the issue at hand arises from the fact that the `assigntable` function's callback is triggered after the completion of the for loop, resulting in all users being assigned to table 1. Instead, the desired behavior is as follows: assign the first user to table 1 -> upon the next iteration detecting table 1 has been assigned, proceed to assign the second user to table 2, and so on. How can this be achieved?
Edit: It should be noted that `Assgintable` is a recursive function that alters the database within a callback. While the update operation is conditional based on the outcome of the previous loop's database state, this detail might not be pertinent to the current discussion.
function assigntable(user,tableindex){
console.log("in recursion with tableindex "+tableindex);
if(tableindex==3)
return;
console.log(user.date + user.time + tableindex);
entry.find({
$and: [
{ "tablenumber": tableindex },
{ "date": user.date },
{ "time": user.time }
]
}, function(err, result) {
if(result.length==0){
console.log(result+"result is ");
entry.update({"_id": user._id}, {"tablenumber": tableindex}, function(err, numberAffected) {
if(!numberAffected){
}
else
{
console.log("entry updated with "+tableindex)
}
});
return;
}
else{
console.log(tableindex);
assigntable(user, tableindex+1);
}
})
}