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Since Rails 4.0, we add an ORDER BY in the `first` method to ensure consistent results among different database engines. But for singular associations this behavior is not needed since we will have one record to return. As this ORDER BY option can lead some performance issues we are removing it for singular associations accessors. Fixes #12623. |
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active_record/connection_adapters | ||
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cases | ||
fixtures | ||
migrations | ||
models | ||
schema | ||
support | ||
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config.example.yml | ||
config.rb |