Preload enterprise distributed_properties for /shops page #12724
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| def distributed_properties | ||
| (distributed_product_properties + distributed_producer_properties).uniq do |property_object| | ||
| property_object.property.presentation | ||
| end | ||
| end |
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As I mentioned in the PR description, this could potentially be done one the DB level too because it might make things simpler - but I suppose I don't have enough knowledge on how this is used so far
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Closing because I think there are better solutions |
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What? Why?
When visiting https://openfoodnetwork.org.uk/shops, the page load is very slow. Given that this page is linked to from the
CTA above the fold on https://openfoodnetwork.org.uk/, it seems ideal that should load quickly.
Here, I have moved
distributed_producer_propertiesanddistributed_product_propertiesout of the enterprise serialiser and into the model (IMO a serialiser shouldn't be making new queries to the DB anyway), and defined them as associations so that they can be preloaded. This should improve on the n+2 situation as visible here (in green):There is potentially further that one could go (defining just a single
distributed_propertieshas_many relationship), but I'm not sure if it's worth it, or about any other intricacies about how it is used.What should we test?
I haven't been able to test this on a representative data set locally, so I'm unable to confirm how much of an impact this has!
Release notes
Changelog Category (reviewers may add a label for the release notes):
Dependencies
It's similar to #12723, but doesn't depend on it directly
Documentation updates