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- This package provides an ``ExplainCollection `` class
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- that allows that allows PyMongo's Collection methods to be explained _
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+ ==============
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+ PyMongoExplain
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+ ==============
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+
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+ :Info: Explain collections in PyMongo. See
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+ `GitHub <https://github.com/mongodb-labs/pymongoexplain >`_
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+ for the latest source.
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+ :Author: Julius Park
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+
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+ About
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+ =====
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+ This package provides an ``ExplainCollection `` class that allows PyMongo's Collection methods to be explained _
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.. _explained : https://docs.mongodb.com/master/reference/command/explain/#dbcmd.explain.
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+ Installation
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+ ============
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+
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+ To install this package simply use pip: ::
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+
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+ pip install pymongoexplain
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+
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+ Support / Feedback
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+ ==================
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+
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+ For questions, discussions, or general technical support, visit the MongoDB Community Forums.
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+ The MongoDB Community Forums are a centralized place to connect with other MongoDB users, ask questions, and get answers.
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+
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+ Bugs / Feature Requests
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+ =======================
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+
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+ Think you’ve found a bug? Want to see a new feature in PyMongoExplain?
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+ Please open an issue on this GitHub repository.
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+
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+ How To Ask For Help
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+ -------------------
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+
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+ Please include all of the following information when opening an issue:
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+
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+ - Detailed steps to reproduce the problem, including full traceback, if possible.
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+ - The exact python version used, with patch level::
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+
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+ $ python -c "import sys; print(sys.version)"
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+
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+ - The exact version of PyMongo used (if applicable), with patch level::
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+
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+ $ python -c "import pymongo; print(pymongo.version); print(pymongo.has_c())"
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+
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+ - The exact version of PyMongoExplain used::
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+
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+ $ python -c "import pymongoexplain; print(pymongoexplain.version)"
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+
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+
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+ Dependencies
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+ ============
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+
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+ PyMongoExplain requires CPython 3.5+, and PyPy3.5+.
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+
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+ PyMongoExplain requires `PyMongo>=3.10,<4 <https://github.com/mongodb/mongo-python-driver/ >`_
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+
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+ Testing
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+ =======
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+
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+ The easiest way to run the tests is to run **python setup.py test ** in
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+ the root of the distribution.
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Tutorial
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- ########
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+ ========
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PyMongo operations in existing application code can be explained by swapping ``Collection `` objects with ``ExplainCollection ``
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objects. The ``ExplainCollection `` class provides all CRUD API methods provided by PyMongo's ``Collection ``,
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Now ``result `` will contain the output of running explain on the given ``update_one `` command::
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- {'$clusterTime':
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- {'signature': {
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- 'keyId': 0, 'hash': b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'},
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- 'clusterTime': Timestamp(1595603051, 3)},
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- 'serverInfo': {'host': 'Juliuss-MBP.verizon.net', 'version': '4.4.0-rc13', 'port': 27017, 'gitVersion': '27f5c1ee9f513f29fe30b8ebefed99581428c6e1'},
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- 'queryPlanner':
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- {'plannerVersion': 1,
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- 'queryHash': 'CD8F6D8F',
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- 'parsedQuery':
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- {'$and': [
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- {'category': {'$eq': 'apparel'}},
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- {'quantity': {'$eq': 1057}}]},
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- 'namespace': 'db.products',
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- 'indexFilterSet': False,
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- 'winningPlan':
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- {'inputStage':
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- {'filter':
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- {'$and': [
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- {'category': {'$eq': 'apparel'}},
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- {'quantity': {'$eq': 1057}}]},
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- 'stage': 'COLLSCAN', 'direction': 'forward'},
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- 'stage': 'UPDATE'}, 'planCacheKey': 'CD8F6D8F',
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- 'rejectedPlans': []}, 'ok': 1.0,
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- 'operationTime': Timestamp(1595603051, 3)}
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+ {'ok': 1.0,
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+ 'operationTime': Timestamp(1595603051, 3),
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+ 'queryPlanner': {'indexFilterSet': False,
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+ 'namespace': 'db.products',
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+ 'parsedQuery': {'$and': [{'category': {'$eq': 'apparel'}},
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+ {'quantity': {'$eq': 1057}}]},
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+ 'planCacheKey': 'CD8F6D8F',
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+ 'plannerVersion': 1,
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+ 'queryHash': 'CD8F6D8F',
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+ 'rejectedPlans': [],
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+ 'winningPlan': {'inputStage': {'direction': 'forward',
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+ 'filter': {'$and': [{'category': {'$eq': 'apparel'}},
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+ {'quantity': {'$eq': 1057}}]},
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+ 'stage': 'COLLSCAN'},
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+ 'stage': 'UPDATE'}},
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+ 'serverInfo': {'gitVersion': '27f5c1ee9f513f29fe30b8ebefed99581428c6e1',
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+ 'host': 'Juliuss-MBP.verizon.net',
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+ 'port': 27017,
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+ 'version': '4.4.0-rc13'}}
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Since ``ExplainCollection `` instances provide all the same methods provided by ``Collection `` instances, explaining operations in your application code is a simple matter of replacing ``Collection `` instances in your application code with ``ExplainCollection `` instances.
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Explaining commands in a script
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- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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+ -------------------------------
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You can also run explain on all commands within a Python script using our CLI tool.
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Given a script that contains ``pymongo `` commands within it, you can simply run: ::
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Any positional parameters or arguments required by your script can be
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simply be appended to the invocation as follows::
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- python3 -m pymongoexplain <path/to/your/script.py> [PARAMS] [--optname OPTS]
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+ python3 -m pymongoexplain <path/to/your/script.py> [PARAMS] [--optname OPTS]
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+
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+
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