Files
habitica/migrations/duplicatedTasksFindAndRemove.js
2015-02-07 14:00:21 +10:00

91 lines
2.3 KiB
JavaScript

/*
* IMPORTANT:
*
* DO NOT TRUST THIS SCRIPT YET
*
*
* This has been written by Alys to identify and remove duplicated tasks
* i.e., tasks that have the same `id` value as another task.
* However it could almost certainly be improved (the aggregation step HAS
* to be easier that this!) and Alys is still working on it. Improvements
* welcome.
*
* If you use it, do ALL of the following things:
*
* - configuration, as described below
* - make a full backup of the user's data
* - be aware of how to restore the user's data from that backup
* - test the script first on a local copy of the database
* - dump the user's data to a text file before running the script so that
* it can later be compared to a dump made afterwards
* - run the script once first with both of the db.users.update() commands
* commented-out and check that the printed task IDs are correct
* - run the script with all code enabled
* - dump the user's data to a text file after running the script
* - diff the two dumps to ensure that only the correct tasks were removed
*
*
* When two tasks exist with the same ID, only one of those tasks will be
* removed (whichever copy the script finds first).
* If three tasks exist with the same ID, you'll probably need to run this
* script twice.
*
*/
// CONFIGURATION:
// - Change the uuid below to be the user's uuid.
// - Change ALL instances of "todos" to "habits"/"dailys"/"rewards" as
// needed. Do not miss any of them!
var uuid='30fb2640-7121-4968-ace5-f385e60ea6c5';
db.users.aggregate([
{$match: {
'_id': uuid
}},
{$project: {
'_id':0, 'todos':1
}},
{$unwind: '$todos'},
{$group: {
_id: { taskid: '$todos.id' },
count: { $sum: 1 }
}},
{$match: {
count: { $gt: 1 }
}},
{$project: {
'_id.taskid':1,
}},
{$group: {
_id: { taskid: '$todos.id' },
troublesomeIds: { $addToSet: "$_id.taskid" },
}},
{$project: {
'_id':0,
troublesomeIds:1,
}},
]).forEach(
function(data) {
// print( "\n" ); printjson(data);
data.troublesomeIds.forEach( function(taskid) {
print('non-unique task: ' + taskid);
db.users.update({
'_id': uuid,
'todos': { $elemMatch: { id: taskid } }
},{
$set: { "todos.$.id" : 'de666' }
});
});
}
);
db.users.update(
{'_id': uuid},
{$pull: { todos: { id: 'de666' } } },
{multi: false }
);