删除所有集合，除了其中的一些

Question

I want to run remove script on all collection except some of them.

The whole collections which don't want remove are from only one(ie XYZ) client so every time the collections from XYZ client's collections will increase. thats why I am not able to fix the removal with below script. because every time I need to mention increased collections over there.

    // making variable for date before 93 days
var monthdate = new Date();
monthdate.setDate(monthdate.getDate() - 93);

//Date format should be : '2019/09/16'  (yyyy/MM/dd)

function objectIdWithTimestamp(timestamp) {
    // Convert string date to Date object (otherwise assume timestamp is a date)
    if (typeof(timestamp) == 'string') {
        timestamp = new Date(timestamp);
    }
    // Convert date object to hex seconds since Unix epoch
    var hexSeconds = Math.floor(timestamp/1000).toString(16);
    // Create an ObjectId with that hex timestamp
    var constructedObjectId = ObjectId(hexSeconds + "0000000000000000");
    return constructedObjectId
}
db.getCollectionNames().forEach(function(c) {
    if(c.match("AggBalances_") && 
    (!c.endsWith("AggBalances_910")) &&
    (!c.endsWith("AggBalances_934")) &&
    (!c.endsWith("AggBalances_966")) &&
    (!c.endsWith("AggBalances_981")) &&
    (!c.endsWith("AggBalances_999")) &&
    (!c.endsWith("AggBalances_1045")) &&
    (!c.endsWith("AggBalances_1073")) &&
    (!c.endsWith("AggBalances_1094")) &&
    (!c.endsWith("AggBalances_1105")) &&
    (!c.endsWith("AggBalances_1068")) 
    ) {    
   db.getCollection(c).remove({ _id: { $lt: objectIdWithTimestamp(monthdate) } })
        print(c);
    }
    else if(c.match("RecBalance_") &&
    (!c.endsWith("RecBalance_910")) &&
    (!c.endsWith("RecBalance_934")) &&
    (!c.endsWith("RecBalance_966")) &&
    (!c.endsWith("RecBalance_981")) &&
    (!c.endsWith("RecBalance_999")) &&
    (!c.endsWith("RecBalance_1045")) &&
    (!c.endsWith("RecBalance_1073")) &&
    (!c.endsWith("RecBalance_1094")) &&
    (!c.endsWith("RecBalance_1105")) &&
    (!c.endsWith("RecBalance_1068"))
    ) { 
   db.getCollection(c).remove({ _id: { $lt: objectIdWithTimestamp(monthdate) } })
        print(c);
    }
  });

@jiri Where do you get the names of the collections that you want to leave untouched?

var setupArr = [];

db.setup.aggregate([
                     { $match: { "ClientID": "5c1cf5e29bbee71ac083b312" } }, // XYZ client Setup codes
                     { $project: { "SetupCode": 1} }
                     ]).forEach(function(user){
//print(user.SetupCode);
setupArr.push(user.SetupCode)
});

print(setupArr) 

from here I am getting these name of collections_setupcodes but not able to skip them using this ( setupArr ) array.

Could you load the names dynamically?

as I am a DBA and very less knowledge of scripting thats why I have raised this query.

Could you save the one client's data to a different database?

No its PROD.

Answer 1

I'm not running the code but I think this should point you to the right direction:

const codes = db.setup.distinct("SetupCode", {
  ClientID: "5c1cf5e29bbee71ac083b312"
});

db.getCollectionNames()
  .filter(function(name) {
    // Does it end with AggBalance or RecBalance and a number?
    const match = name.match(".*(?:AggBalance|RecBalance)_([0-9]+)$");

    if (!match)
      return true;

    // Convert the match to an actual number and see if it's present in the
    // array
    const code = parseInt(match[1], 10);
    return !codes.includes(code);
  })
  .forEach(function(name) {
    print("About to remove from", name);
    // Test it first!
    // db.getCollection(name).remove({
    //   _id: {
    //     $lt: objectIdWithTimestamp(monthdate)
    //   }
    // });
  });