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Author	SHA1	Message	Date
Andrei	e0ce459c96	[bugfix] fix behavior of cached_property This commit is a fairly large chunk of code that fixes a previously annoying and nasty bug causing cached_properties to not be cleared. Alongside this bug fix I took the opportunity to refactor the entire methdology behind cached properties, and bind them more strictly to the behavior of models. Prior to this commit, cached_properties where not be properly reset upon a model's `update` method being called due to some invalid code. Along with this issue, the actual behavior of cached properties landed in a weird in-between/gray area where they had to support both non-model and model use cases. The new version of cached_property is strictly for use with models, and another version `simple_cached_property` was added to support other use cases. The new cached_property simply builds an actual `property` within the metaclass. This is fairly efficient, and also reduces the surface area of behavior. When writing this I messed around with a few ideas, including allowing the user of `cached_property` to define a linkage between the property and fields that should invalidate its cached value, but this was both messy and introduced massive cognitive load on understand when a cached_property should be cleared. Although this version is slighty less efficient, I'm very much in favor of it vs the alternatives I tried.	8 years ago

Author

SHA1

Message

Date

Andrei

e0ce459c96

[bugfix] fix behavior of cached_property

This commit is a fairly large chunk of code that fixes a previously
annoying and nasty bug causing cached_properties to not be cleared.
Alongside this bug fix I took the opportunity to refactor the entire
methdology behind cached properties, and bind them more strictly to the
behavior of models.

Prior to this commit, cached_properties where not be properly reset upon
a model's `update` method being called due to some invalid code. Along
with this issue, the actual behavior of cached properties landed in a
weird in-between/gray area where they had to support both non-model and
model use cases.

The new version of cached_property is strictly for use with models, and
another version `simple_cached_property` was added to support other use
cases. The new cached_property simply builds an actual `property` within
the metaclass. This is fairly efficient, and also reduces the surface
area of behavior.

When writing this I messed around with a few ideas, including allowing
the user of `cached_property` to define a linkage between the property
and fields that should invalidate its cached value, but this was both
messy and introduced massive cognitive load on understand when a
cached_property should be cleared. Although this version is slighty less
efficient, I'm very much in favor of it vs the alternatives I tried.

8 years ago

1 Commits (2989a2cec6d000f79bb7554fc33b623066909e44)