Prior to this change, we setup our feed variant query to have a cached
randomization seed. For a given user this seed is cached for 15
minutes. The goal of this is to provide mostly consistent sort orders
on the feed articles during that 15 minute window.
With this change, we allow for a feed variant to say ignore the cached
seed and generate a new one for this call.
I have also added explicit settings to each of the feed variants to
reflect our desired intentions for those features.
Relates to
- forem/forem#17833
- forem/forem#17826Closesforem/forem#17940
Prior to this commit, the SQL fragments included variables that were set
configured at a global level.
With this commit, we're now saying that each lever "knows" what variable
it needs; and providing the means at lever declaration time to "say"
what those variable names are. (e.g. `Articles::Feeds::LEVER_CATALOG`).
Then as part of the variant configuration (in the
`./config/feed-variants/*.json` files) we now include the expected value
of those parameters; which by convention (and coercion) are integers.
This relates to forem/forem#17584 because we want to move from a
privileged user reaction that has two values (`negative` and `positive`)
into four values (`very_negative`, `negative`, `positive`, and
`very_positive`). To do that, we'll create a new lever; but that's for
another pull request.
* Allowing VariantQuery for Feed Generation
Apologies for the breadth of this pull request, I had considered many
small commits, but felt that would've been more effort for the value
provided.
This commit includes the following:
- Documentation updates to the feed variant (though not the final pass)
- Renaming and adding RelevancyLevers that help differentiate
- Adding RelevancyLever#range to provide documentation
- Reducing redundent controller logic by making a
`Articles::Feeds.feed_for` method.
- Adding some configuration validation for RelevancyLevers
- Adding constants for better clarification
- Testing unhappy paths for feed configuration
- Adjusting the module namespace of some objects
- Exposing top-level configurations for variants (along with their
defaults)
- Creating the VariantyQuery that at present inherits from the
`Articles::Feeds::WeightedQueryStrategy`
As implemented, we can deploy this code to production without using the
new VariantQuery. Once we toggle on the
`:feed_uses_variant_query_feature` FeatureFlag, it will switch to using
the VariantQuery. The VariantQuery's two variants and the
internal configuration of `Articles::Feeds::WeightedQueryStrategy`
produce the same query.
The goal of this factor is to allow for a quick on and off toggle of the
feed query; to ensure that what we introduce remains performant.
- Closesforem/forem#17272
- Closesforem/forem#17276
- Closesforem/forem#17216
In addition, I will be recording a code-walkthrough and linking that
recording to the pull request.
* Apply suggestions from code review
Co-authored-by: Mac Siri <krairit.siri@gmail.com>
Co-authored-by: Mac Siri <krairit.siri@gmail.com>
