使用 Python dict 查询 mongo 集合

Question

My MongoDB documents look like:

{
  'x': 1,
  'y': 2,
  'z': 3
},
{
  'x': 10,
  'y': 20,
  'z': 30
},
{
  'x': 100,
  'y': 200,
  'z': 300
},

and the queries look like:

query_1 = {
  'x': [1, 100]
}

query_2 = {
'x': [10],
'z': [2]
}

Unfortunately, when we do collection.find(query_1) or collection.find(query_2) , we get no results which is because of the lists in the queries. How can I make Mongo take my queries? Please note that the 'values' of my query dictionaries are always lists.

EDIT:

Expanding on Belly Buster's answer below, I believe if I do:

{
'$or': [
         {'x': {'$in': ['item1', 'item2']}},
         {'y': {'$in': ['item1', 'item2']}}
        ]
}

answers my question. However, I feel that there is a better way to achieve this. Is there?

Answer 1

Query 1 you are searching on a field x that contains a list [1, 100] . As there aren't any records matching, you get no results. Now if you wanted to search x for either 1 or 100, you need to use the $in operator; your query should be:

result = db.mycollection.find({'x': {'$in': [1, 100]}})

Query 2 you are searching on a field x containing a list [10] and a field z containing a list [2] . Again there's nothing matching that in your data.

I'm not sure what query you are trying to perform for this, but if it is x == 10 or z == 2 , then your query is :

result = db.mycollection.find({'$or': [{'x': 10}, {'z': 2}]})