MongoDB String to Date? - mongodb

Question

Following is the JSON of the data:
{
projectName: String,
projectDescription: String,
users: [
],
projectManager: [
],
teamLead: [
],
createdBy: String,
superAdmin: String,
createdAt: Date,
task: [
{
userID: String,
name: String,
taskName: String,
nohrs: Number,
description: String,
comments: String,
date: String,
from: String,
to: String,
lastUpdatedDate: String
}
]
}
The array of task contains many tasks for each project. And each task has a date in string format. I need to convert each string date to ISO date format.
How can we achieve this?
I have tried this :
db.projects.find({}).forEach(function(task){
task.date = new Date(task.date);
db.collection.save(task);})
but this is adding a column date and not editing the date in task array?

Answer 1

You were really close to the solution. The correct code snippet would be:
db.projects.find({}).forEach(function(project){
project.task.forEach(function(task){
task.date = new Date(task.date);
});
db.projects.save(project);
})
You needed one more loop in your code :)

Answer 2

Well guys this worked
db.projects.find({}).forEach(function(project){
project.task.forEach(function(task){
// printjson(task)
task.date = new Date(task.date);
print(task.date)
db.projects.save(project);
})})

Answer 3

db.projects.find({},function(err,data){
//this find query will return the array of documents through which we need to iterate
for(var i =0; i<data.length;i++){
//then we want convert the date string into Date we need to iterate task array with in each document.
for(var j = 0;j<data[i].task.length;j++){
data[i].task[j].date = new Date(data[i].task[j].date);
}
}
//now save the new data
data.save();
})