motorengine | Motorengine is a port of MongoEngine for Tornado | Reactive Programming library
kandi X-RAY | motorengine Summary
kandi X-RAY | motorengine Summary
Motorengine is a port of MongoEngine for Tornado.
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Top functions reviewed by kandi - BETA
- Remove callback
- Return a connection to MongoDB
- Return the collection object for this instance
- Removes an instance from the collection
- Get a single document
- Decorator to handle a get request
- Find references in a document
- Loads all references
- Simplify a combination
- Combine a list of queries into a single query
- Generate a query object
- Recursively update a dictionary
- Convert to json representation
- Get the value of a field
- Create a model from a JSON representation
- Get field by name
- Update a document
- Decorator to handle update documents
- Return a UniqueKeyViolationError instance from a pymongo error message
- Get current motor document
- Returns the embedded document type
- Get the reference document type
- Remove the object from the database
- Generate a query to query
- Generate a query for aggregation
- Return the application
motorengine Key Features
motorengine Examples and Code Snippets
db.collection.aggregate([
{
"$project": {
"_id": {
"$toString": "$_id"
},
"name": 1,
"last_name": 1,
"customer_type": 1,
"address.0": 1,
"email": 1,
"birthdate": {
"$dat
motorengine.connect(
db=name,
alias=alias,
host="mongodb://username:password@localhost:port",
io_loop=tornado.ioloop.IOLoop.instance()
)
Community Discussions
Trending Discussions on motorengine
QUESTION
I have the following model:
class DbObjectWithCoordinates(Document):
coordinates = GeoPointField() # this used to work with mongengine
I used the mongoengine.GeoPointField
to perform queries like find all objects near to given coordinates:
ANSWER
Answered 2018-Apr-16 at 03:10I think it would be fairly easy to implement geopoint field. Below is very simple implementation offcourse it is not a full one.
QUESTION
Let's say I have BaseClass
which contains some logic in main_function()
which is common for both SyncClass
and AsyncClass
. Let's say those 2 classes have their unique implementation of get_data()
and the former gets in synchronous manner, while the latter in asynchronous manner. I have written something like this and it seems to work:
ANSWER
Answered 2017-Apr-02 at 14:36Synchronous and asynchronous methods have different interfaces (that's what it means to be asynchronous). AsyncClass.get_data
returns a Future
; SyncClass.get_data
does not. If this were in a statically-typed language, these two methods would not be able to implement the same abstract method from the base class. Of course, Python is more flexible and does not restrict you in this way, but the caller still needs to either know which kind of method it's dealing with or be prepared to find out via try/except
or isinstance
checks, etc. (note that try/except is dangerous in this case, because yield
in a tornado coroutine will accept things like lists and dicts)
In general, you cannot transparently switch between them as you're hoping to do here. Remember that any function that may call yield self.get_data()
also needs to be decorated with @coroutine
, so once one part of your system is asynchronous, it starts to spread. It's usually best to embrace this trend and just make things asynchronous.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install motorengine
You can use motorengine like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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