magicdb 0.0.7

Typed ORM for python.

MagicDB

A fully typed Firestore ORM for python -- the easiest way to store data.

MagicDB inherets from Pydantic, so you get all the power of Pydantic models with the functionality of Firestore: https://pydantic-docs.helpmanual.io/.

Instalation

pip install magicdb

Initialize the DB

MagicDB is initialized via a Firestore service account json which you download from your Firebase console. Once you have the json, you must tell MagicDB where it is, either by 1) setting the GOOGLE_APPLICATION_CREDENTIALS environment variable to the json path, or by 2) calling magicdb.connect with the path:

# 1)
# You can set the env variable from the terminal too: export GOOGLE_APPLICATION_CREDENTIALS="path/to/my-service-account.json"
import os
os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = "path/to/my-service-account.json"

# OR

# 2)
import magicdb
magicdb.connect(from_file="path/to/my-service-account.json")

Example

from magicdb.Models import MagicModel

class Salesman(MagicModel):
    name: str = None
    company: str = None

s = Salesman()
s.name = 'Jim'
s.save()

# Get Salesman
s = Salesman.collection.get(s.id)
print(s.name) # Jim

Fields

Use any type mypy will accept!

Fields Example

from datetime import datetime

class Manager(MagicModel):
	name: str
	age: int
	company: str = 'Dunder Mifflin'
	startedWorkingAt: datetime = None

# m = Manager(name='Michael Scott', age=44)  # you must pass in the required fields on initializing the object.
m.age = 45
m.save()  # Success! New doc in collection "manager" as: { name: Michael Scott, age: 45, company: Dunder Mifflin }

m = Manager(name='Dwight Schrute') # Exception since age is required but not given

You can also add other Objects as a field.

NestedModel Example

class Dog(MagicModel):
	age: int
	owner: Manager

dog = Dog()
dog.age = 3
dog.owner = Manager(name='Robert California', age=59)
dog.save()
print(dog)

Collections

The collection name for a class defaults to the class' name in lowercase. To set the collection name, use the Meta class.

Meta Example

class Student(MagicModel):
	name: str = None
	school: str = 'UPenn'

	class Meta:
		collection_name = 'students'


s = Student(name='Amy Gutman')
s.save()  # creates a new document in the "students" collection
print(s)  # name='Amy Gutman' school='UPenn'

You can also inheret classes.

Inheritance Example

class ExchangeStudent(Student):
	originalCountry: str

	class Meta:
		collection_name = 'exchangeStudents'

e = ExchangeStudent(originalCountry='UK')
print(e.school)  # UPenn
e.save()
print(e)  # name=None school='UPenn' originalCountry='UK'

Queries

You can make queries with the same syntax you would using the Python firebase-admin SDK. But FireORM returns the objects.

Queries Example

e = ExchangeStudent(originalCountry='UK')
print(e.school)  # UPenn
e.save()
print(e)  # name=None school='UPenn' originalCountry='UK'

managers = Manager.collection.where('name', '==', 'Michael Scott').limit(1).stream()
print(managers) # [Manager(name='Michael Scott', age=45, company='Dunder Mifflin', startedWorkingAt=None)]
print(managers[0].id)
manager = Manager.collection.get('0mIWZ8FfgQzBanCllqsV')
print(manager) # name='Michael Scott' age=45 company='Dunder Mifflin' startedWorkingAt=None