pydantic-aioredis

pydantic-aioredis

Pydantic-aioredis is designed to provide an efficient way of integrating Redis databases with Python-based applications. Built on top of Pydantic, pydantic-aioredis allows you to define data models and validate input data before it is stored in Redis. Data is validated before storing and after retrieval from Redis. The library also provides an easy-to-use API for querying, updating, and deleting data stored in Redis.

Inspired by pydantic-redis by Martin Ahindura

Main Dependencies

• Python +3.7
• redis-py <4.2.0
• pydantic

Getting Started

Examples

Examples are in the examples/ directory of this repo.

Installation

Install the package

pip install pydantic-aioredis

Quick Usage

Import the Store, the RedisConfig and the Model classes and use accordingly

import asyncio
from datetime import date
from pydantic_aioredis import RedisConfig, Model, Store

# Create models as you would create pydantic models i.e. using typings
class Book(Model):
    _primary_key_field: str = 'title'
    title: str
    author: str
    published_on: date
    in_stock: bool = True

# Do note that there is no concept of relationships here
class Library(Model):
    # the _primary_key_field is mandatory
    _primary_key_field: str = 'name'
    name: str
    address: str

# Create the store and register your models
store = Store(name='some_name', redis_config=RedisConfig(db=5, host='localhost', port=6379), life_span_in_seconds=3600)
store.register_model(Book)
store.register_model(Library)

# Sample books. You can create as many as you wish anywhere in the code
books = [
    Book(title="Oliver Twist", author='Charles Dickens', published_on=date(year=1215, month=4, day=4),
        in_stock=False),
    Book(title="Great Expectations", author='Charles Dickens', published_on=date(year=1220, month=4, day=4)),
    Book(title="Jane Eyre", author='Charles Dickens', published_on=date(year=1225, month=6, day=4), in_stock=False),
    Book(title="Wuthering Heights", author='Jane Austen', published_on=date(year=1600, month=4, day=4)),
]
# Some library objects
libraries = [
    Library(name="The Grand Library", address="Kinogozi, Hoima, Uganda"),
    Library(name="Christian Library", address="Buhimba, Hoima, Uganda")
]

async def work_with_orm():
  # Insert them into redis
  await Book.insert(books)
  await Library.insert(libraries)

  # Select all books to view them. A list of Model instances will be returned
  all_books = await Book.select()
  print(all_books) # Will print [Book(title="Oliver Twist", author="Charles Dickens", published_on=date(year=1215, month=4, day=4), in_stock=False), Book(...]

  # Or select some of the books
  some_books = await Book.select(ids=["Oliver Twist", "Jane Eyre"])
  print(some_books) # Will return only those two books

  # Or select some of the columns. THIS RETURNS DICTIONARIES not MODEL Instances
  # The Dictionaries have values in string form so you might need to do some extra work
  books_with_few_fields = await Book.select(columns=["author", "in_stock"])
  print(books_with_few_fields) # Will print [{"author": "'Charles Dickens", "in_stock": "True"},...]


  this_book = Book(title="Moby Dick", author='Herman Melvill', published_on=date(year=1851, month=10, day=17))
  await Book.insert(this_book)
  # oops, there was a typo. Fix it
  # Update is an async context manager and will update redis with all changes in one operations
  async with this_book.update():
    this_book.author = "Herman Melville"
    this_book.published_on=date(year=1851, month=10, day=18)
  this_book_from_redis = await Book.select(ids=["Moby Dick"])
  assert this_book_from_redis[0].author == "Herman Melville"
  assert this_book_from_redis[0].published_on == date(year=1851, month=10, day=18)

  # Delete any number of items
  await Library.delete(ids=["The Grand Library"])

# Now run these updates
loop = asyncio.get_event_loop()
loop.run_until_complete(work_with_orm())

Custom Fields in Model

Field Name	Required	Default	Description
_primary_key_field	Yes	None	The field of your model that is the primary key
_redis_prefix	No	None	If set, will be added to the beginning of the keys we store in redis
_redis_separator	No	:	Defaults to :, used to separate prefix, table_name, and primary_key
_table_name	No	cls.name	Defaults to the model's name, can set a custom name in redis
_auto_save	No	False	Defaults to false. If true, will save to redis on instantiation
_auto_sync	No	False	Defaults to false. If true, will save to redis on attr update

License

Licensed under the MIT License

Contributing

Contributions are very welcome. To learn more, see the Contributor Guide

Contributors

Thanks go to these wonderful people (emoji key):

Andrew 💻 📖	Martin Ahindura 💻 🤔	david-wahlstedt ⚠️ 📖 👀	Daniel Wallace ⚠️	Paco Nathan 💡	Andreas Brodersen 📖	kraczak 📖
CharlieJiangXXX 💻