问题
I am trying to figure out how to match a key and return all the values for that key. Is it possible to give the value as a wildcard? I want to return everything for that specific key using wildcard on the value.
db.collection.find({"key" :"*"})
Also I was hoping this would return the entire collection as well that had the key with the wildcard value match as well.
回答1:
You may be looking for something like this:
db.collection.find({"key": {$exists: true}})
This will return all documents in the collection where the key "key" is present. The entire document is returned.
回答2:
Yes:
db.collection.distinct("key")
来源：https://stackoverflow.com/questions/44616276/mongodb-wildcard-match-all-values-for-specific-key