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CachingQuery implementation to Flask using Flask-SQLAlchemy and Flask-Caching

Project description


This is a fork of iurisilvio's Flask-SQLAlchemy-Cache

A CachingQuery implementation to Flask using Flask-SQLAlchemy and Flask-Caching.

To start using caching queries, you just have to replace Flask-SQLAlchemy Model.query_class.

from flask_sqlalchemy import SQLAlchemy
from flask_sqlalchemy_caching import CachingQuery
from flask_caching import Cache

db = SQLAlchemy(app, query_class=CachingQuery)

cache = Cache(app)

After that, you can just make queries to a model YourModel:

from flask_sqlalchemy_caching import FromCache

# cache is a Flask-Caching instance imported for your app init

You also have RelationshipCache to enable lazy loading relationships from cache.

from sqlalchemy.orm import lazyload
from flask_sqlalchemy_caching import RelationshipCache

rc = RelationshipCache(YourModel.some_relationship, cache)
obj = YourModel.query.options(lazyload(YourModel.some_relationship), rc).get()

# make the query and cache the results for future queries

If there is a column in your table that is much more dynamic and you want to exclude it from being cached, try using a deferred query like:


Take a look at Dogpile Caching example to more details about how CachingQuery works. Most changes to their were made just to integrate it with Flask, Flask-SQLAlchemy and Flask-Caching instead of Dogpile.

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