pymongo

问题 I am doing something wrong or I don't understand $push (probably don't understand). Anyway I have the following document: { "_id" : ObjectId("501c83051d41c8753e000000"), "node" : "denver", "enc" : { "environment" : "production", "classes" : { "denver" : "" } }, "inherit" : "default" } And I am trying to make the document { "_id" : ObjectId("501c83051d41c8753e000000"), "node" : "denver", "enc" : { "environment" : "production", "classes" : { "denver" : "", "boulder" : ""} }, "inherit" :

问题 Mongo shell have the bsonsize() method to get BSON size of a given document retrieved from DB. Is there any way of getting the same using PyMongo driver? I have found the bson module in the documentation but it is not fully clear to me how to use it to get the size of a document retrieved from DB. 回答1: Based on @SSDMS suggestion (thanks!) the following can be used: len(bson.BSON.encode(document)) I have tested with a couple of documents in my DB, comparing the result at mongo shell and with

问题 I am trying to apply indexing for my mongodb collection through pymongo. I am using db[collection_name].ensure_index([("field_name" , "text"),("unique", 1), ("dropDups" , 1)]) and it works. But now how can apply it for multiple fields? Something like this db[collection_name].ensure_index([("field_name1" , "text"),("field_name2", "text"),("field_name3", "text"),("unique", 1), ("dropDups" , 1)]) I know we can use db.collection.ensureIndex({"$**":"text"},{"name":"TextIndex"}) in mongo shell but

问题 Im working a mongodb database using pymongo python module. I have a function in my code which when called updates the records in the collection as follows. for record in coll.find(<some query here>): #Code here #... #... coll.update({ '_id' : record['_id'] },record) Now, if i modify the code as follows : for record in coll.find(<some query here>): try: #Code here #... #... coll.update({ '_id' : record['_id'] },record,safe=True) except: #Handle exception here Does this mean an exception will

问题 I'm using MongoKit to perform iteration over a huge amount of data. During this process my cursor becomes invalid, and I'm getting OperationFailure: cursor id '369397057360964334' not valid at server I've read in mailing lists that I can pass parameter timeout=False to .find() method, but PyMongo FAQ says that I vave to take care of closing cursor myself. But I didn't find methods in MongoKit for that. Do I need to close cursor by hand, and if yes - how can I do it? 回答1: You'll have to close

问题 I'm looking at mongodb tutorials. I want to make use of some javascript mongodb functions, but I can't see how I can do this with pymongo. I can fire up mongo shell, but this has to be done via pymongo as a part of my wsgi app. pymongo seems to have Code object - How can I 1)put some Code objects into my db, and 2)use them with pymongo? 回答1: Any JavaScript functions you want to run on the server have to be executed with "eval" command. You can see how to invoke that from Python here. You can

问题 I am really new to Flask and MongoDB . I read the Flask documentation about MongoDB , and turns out I felt so confused that I did not know which one I need to install. In Flask document, it says if you want to operate MongoDB , you should install Mongokit , yes I did, I build the user structure like document said, and save it, but it did not work, I look up into MongoDB shell, nothing stored there. So, i keep searching that I need Pymongo , and another document say that Flask-PyMongo is the

问题 I'm trying to code up a script to do basic 2dsphere index operation mentioned here 2dsphere using pymongo. I could not find any example to figure it out, this is my attempt so far: from pymongo import GEOSPHERE client=MongoClient('localhost',27017) db=client['dbtest'] points=db['points'] points.create_index([("loc",GEOSPHERE)]) points.insert({"loc":[2 5]}) points.insert({"loc":[30,5]}) more points.insert for doc in points.find({"loc" : {"$near": { "$geometry" : {"type":"Point","coordinates":

问题 I have a db set up in mongo that I'm accessing with pymongo. I'd like to be able to pull a small set of fields into a list of dictionaries. So, something like what I get in the mongo shell when I type... db.find({},{"variable1_of_interest":1, "variable2_of_interest":1}).limit(2).pretty() I'd like a python statement like: x = db.find({},{"variable1_of_interest":1, "variable2_of_interest":1}) where x is an array structure of some kind rather than a cursor---that is, instead of iterating, like:

问题 I'm trying to import json_util in my environment file: from bson import json_util I get this import error: no module named bson . I tried to pip install and uninstall pymongo and bson - but nothing seemed to help. I found out that the bson package is included in pymongo so I installed it explicitly and then I received an EPOCH_AWARE import error. Currently, only pymongo is installed. It works when I force the virtual environment by using this line: #subprocess.Popen(['/home/.virtualenvs