I have a python dictionary that has {objctID},'GUID',{'A':A's score'},{ 'B':'B's score}.I have got 5 guid's in the dictionary.
The same format document is already stored in mongoDB.
I want to check if the guid's in python dict are there in mongodb collection. If exist it has be to updated else insert to mongoDB.
How can I do this using pyMongo?
Assuming that RESULT is a dict with keys that match yourIDs and that contains your scores, you can do the following :
ids = RESULT.keys()
for id in ids:
collection.update({"ID": id}, {$set : {id : RESULT[id]}}, true)
The true, will insert if the document doesn't already exist.
Here are the pymongo docs
Related
I have a dictionary object in python,
dic = {"_id":1,
"A":123,
"B":234,
"C":222}
and a collection in mongo that has stored the same ID document in mongo which looks like,
mongodoc= {"_id":1,"A":233,"B":234,"D":999}
I want to update the documents in mongo directly based on the dictionary values using pymongo,
mongodoc={"_id":1,"A":123,"B":234,"D":999,"C":222}
If the keys matches between the dictionary and mongo document, update the values else insert new key value pairs.
I tried using
collection.update{"_id:1",{"set"}}
but this needs to be given a specific keys which doesn't work for my problem statement. Not sure how to proceed.
Kindly help.
The $set operator takes a dictionary which will achieve what you are looking to do:
collection.update_one({'_id': dic['_id']}, {'$set': dic})
i have saved one json using Rejson against a key,now i would like to filter/query out data using ReJson.
Please let me know how can i do it ...python prefered .
print("Abount to execute coomnad")
response=redisClient.execute_command('JSON.SET', 'object', '.', json.dumps(data))
print(response)
reply = json.loads(redisClient.execute_command('JSON.GET', 'object'))
print(reply)
using the above code i was able to set data using ReJson .now lets suppose i want to filer data .
my test json is :
data = {
'foo': 'bar',
'ans': 42
}
How can you filter say json in which foo has value as bar
Redis in general, and ReJSON specifically, do not provide search-by-value functionality. For that, you'll have to either index the values yourself (see https://redis.io/topics/indexes) or use RediSearch.
I have checked following, but didn't work.
https://redis.io/commands/keys
KEYS Room:*
1) "Room:120"
2) "Room:121"
3) "Room:122"
Following is the redis key/values (HMSET)
Room:120 [SocketId:mOQDJusPjDTBN5L-AAAC,TimeStamp:10-10-2017 12:10:00 AM]
Room:121 ....
Room:122 ....
...
Need to search as Room:* SocketId:mOQDJusPjDTBN5L-AAAC
How can I search for SocketId in the collection ?
Need to search with:
mOQDJusPjDTBN5L-AAAC
The question is not so clear
as u mentioned hmset i am assuming that you are using hashes to store your data.
As per your data,
'room120' should be the key, 'socketId' should be the field and 'mOQDJusPjDTBN5L-AAAC' should be the value.
so in order to search for socketId you can use hscan,where hscan iterates through the field of a particular key.https://redis.io/commands/scan
in case if you are just using key/value storage i.e
'socketId' being the key ,'mOQDJusPjDTBN5L-AAAC' being the value.
here u can just use the command Keys *socket*to search for the key socketId
I see that all examples for JSON uses the query as string like
String cqlStatement = "INSERT INTO users JSON '{\"id\":888 , \"age\":21 ,\"state\":\"TX\"}'";
but I want to use QueryBuilder, since I would like to insert in batch.
Thanks
Use Insert.json() method
Inserts the provided object, using the INSERT INTO ... JSON syntax introduced in Cassandra 2.2.
Example :
QueryBuilder.insertInto("my_data").json("{\"id\": 1, \"value\": \"This is a test\"}");
Note : Any columns which are omitted from the JSON string will be defaulted to a NULL value (which will result in a tombstone being created).
In my application, I get some values from MSSQL using PyMSSQL. Python interpret one of this values as UUID. I assigned this value to a variable called id. When I do
print (type(id),id)
I get
<class 'uuid.UUID'> cc26ce03-b6cb-4a90-9d0b-395c313fc968
Everything is as expected so far. Now, I need to make a query in MongoDb using this id. But the type of my field in MongoDb is ".NET UUID(Legacy)", which is NUUID. But I don't get any result when I query with
client.db.collectionname.find_one({"_id" : id})
This is because I need to convert UUID to NUUID.
Note: I also tried
client.db.collectionname.find_one({"_id" : NUUID("cc26ce03-b6cb-4a90-9d0b-395c313fc968")})
But it didn't work. Any ideas?
Assuming you are using PyMongo 3.x:
from bson.binary import CSHARP_LEGACY
from bson.codec_options import CodecOptions
options = CodecOptions(uuid_representation=CSHARP_LEGACY)
coll = client.db.get_collection('collectionname', options)
coll.find_one({"_id": id})
If instead you are using PyMongo 2.x
from bson.binary import CSHARP_LEGACY
coll = client.db.collectionname
coll.uuid_subtype = CSHARP_LEGACY
coll.find_one({"_id": id})
You have to tell PyMongo what format the UUID was originally stored in. There is also a JAVA_LEGACY representation.