Execute MongoDb Statements in Python

Question

I have a Webserver running in Python. He is getting some Data from some Apps and need to store these in MongoDB. My MongoDB is sharded. Now i want that my Webserver know how much Shards MongoDB has. At the moment he reads this from a cfg file. There is an Statement in MongoDb named printshardingstatus where u can see all shards. So i tried to call this statement from my Pythonserver. But it seems that it is not possible.I dont find such a function in the Pymongo API.

So my question is, is there an chance to run an MongoDB Statement in Python, so that it is directly passed and executed in MongoDB ?

Scott Hernandez · Accepted Answer · 2012-07-25 13:02:18Z

1

There is no server command for printShardingStatus -- it is just a mongo (javascript) shell helper function. The helper is a few queries against the config database and then some grouping and formatting to make things look nicer.

If you ever want to see how things work in the javascript shell you can just remove the parens ("()") from the function and it will print the javascript code.

Here is the code from the javascript shell.

> printShardingStatus
function (configDB, verbose) {
   if (configDB === undefined) {
       configDB = db.getSisterDB("config");
   }
   var version = configDB.getCollection("version").findOne();
   if (version == null) {
       print("not a shard db!");
       return;
   }
   var raw = "";
   var output = function (s) {raw += s + "\n";};
   output("--- Sharding Status --- ");
   output("  sharding version: " +
   ...

edited Jul 25, 2012 at 13:02

answered Mar 20, 2011 at 4:29

Scott Hernandez

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Dave Everitt · Accepted Answer · 2011-03-18 10:38:01Z

0

Have you tried pymongo or mongoengine? Then perhaps send a message to the authors...

answered Mar 18, 2011 at 10:38

Dave Everitt

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2 Comments

fastidias Over a year ago

found the answer ... there is an command function where u can put the statement in

Dave Everitt Over a year ago

great - for anyone else reading this in future, please share an example :-)

fastidias · Accepted Answer · 2011-03-21 11:37:45Z

0

You can simply get config databasr and execute find() on shards collection just like normal collection.

answered Mar 21, 2011 at 11:37

fastidias

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