mangodm 0.1.4

mangODM - simple async ODM for mongodb.

MANGO - simple async ODM for MongoDB.

User Guide

Installation

You can install mangodm via pip.

pip install mangodm

Initialization

Firstly need to connect to MongoDB.

from mangodm import connect_to_mongo

MONGODB_CONNECTION_URL = ""
DATABASE_NAME = ""

async def main():
	await connect_to_mongo(MONGODB_CONNECTION_URL, DATABASE_NAME)

Don't forgot to close connection.

from mangodm import connect_to_mongo, close_connection

MONGODB_CONNECTION_URL = ""
DATABASE_NAME = ""

def befor_down():
	close_connection()

  

async def main():
	await connect_to_mongo(MONGODB_CONNECTION_URL, DATABASE_NAME)

Defining Collection

Inherit Document class and describe its fields to defining new collection.

from mangodm import Document

class User(Document):
	name: str
	age: int

Before start to use collection you need to register it.

from mangodm import Document

class User(Document):
	name: str
	age: int

User.register_collection() # IMPORTANT

Also you can add special configuration to collection. To do this add subclass Config.

Config Parameters

• collection_name - collection name in mongoDB.
• excludeFields - list of names fields which don't saving in DB.
• excludeFieldsResponse - list of names fields which don't include in response.

from mangodm import Document

class User(Document):
	name: str
	password: str
	age: int
	points: int

	class Config:
		collection_name = "users"
		excludeFields = ["points"]
		excludeFieldsResponse: ["password"]

User.register_collection()

Create new document

For create new document just create new object of collection class and call create() method from it.

from mangodm import Document

class User(Document):
	name: str
	age: int

User.register_collection()

async def main():
	mike = User(name="Mike", age=23)
	await mike.create()

After creating you can get document id. ID is str type.

async def main():
	mike = User(name="Mike", age=23)
	await mike.create()
	print(mike.id)

Get documents from MongoDB

To get one document use method - get. Parameters for this method is filter for finding document. Parameter convert to JSON and put to MongoDB method find_one.

Method return class object or none if querying document doesn't exist.

from mangodm import Document

class User(Document):
	name: str
	age: int

User.register_collection()

async def main():
	mike = await User.get(name="Mike")
		if mike:
			print(mike.id)
	
	anna = await User.get(id="6561a3851492b7e9d9a9533e")
	if anna:
		print(anna.age)

To get all documets which suitable for finding filter use method - find. This method has same paramrtrs how method get. find method return list of class objects, list can be empty.

from mangodm import Document

class User(Document):
	name: str
	age: int

User.register_collection()

async def main():
	users = await User.find() # get all documents if no parametrs
	for user in users:
		print(user.id)

Updating document

To update editing use method update.

from mangodm import Document

class User(Document):
	name: str
	age: int
	
User.register_collection()

async def main():
	mike = await User.get(name="Mike")
	if mike:
		print(mike.id)
		mike.age = 24
		await mike.update()

Deleting document

To delete document use method delete.

from mangodm import Document

class User(Document):
	name: str
	age: int

User.register_collection()

async def main():
	mike = await User.get(name="Mike")
	if mike:
		await mike.delete()

Response documents

You can convert your document to JSON. For this use method to_response().

from mangodm import Document

class User(Document):
	name: str
	age: int

User.register_collection()

async def main():
	mike = await User.get(name="Mike")
	if mike:
		print(mike.to_response())