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Merge pull request #33360 from jedrekdomanski/Update-active-record-querying-readme

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Update documentation for #pluck method [ci skip]
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Eileen M. Uchitelle 2018-07-14 13:38:13 -04:00 committed by GitHub
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6
guides/source/active_record_querying.md
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@ -1777,6 +1777,12 @@ Client.pluck(:name)
# => ["David", "Jeremy", "Jose"]
```
You are not limited to querying fields from a single table, you can query multiple tables as well.
```
Client.joins(:comments, :categories).pluck("clients.email, comments.title, categories.name")
```
Furthermore, unlike `select` and other `Relation` scopes, `pluck` triggers an immediate
query, and thus cannot be chained with any further scopes, although it can work with
scopes already constructed earlier: