Is there a way to convert a Binary field of type 4 to type 0 using a Shell script?
I considered executing a simple script such as the one below:
db.places.find({}).forEach(function(data) {
// How can I access the data?
print(data.id);
// db.places.update(....)
});
However, I encountered difficulties in obtaining the binary data required to create a new Binary. Using Object.keys(), I observed that only two fields were present: type and len
It is impossible to manipulate the data type forcefully. I am not entirely clear on your motivation for wanting to do so, but you can modify the document to enforce a different data type:
db.places.insert( { id: new BinData( 0x04, "SEVMTE8=" ) } );
db.places.find();
{ "_id" : ObjectId("5204c4f252d346a74dd17755"), "id" : BinData(4,"SEVMTE8=") }
Therefore, in your script, you have the option to proceed as follows:
db.places.find({}).forEach(function(data) {
bindata = data.id.base64();
db.places.update( { _id: data._id }, { $set: { id : new BinData(0, bindata) } } );
});
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