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| author | Eileen M. Uchitelle <eileencodes@users.noreply.github.com> | 2018-07-14 13:38:13 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-07-14 13:38:13 -0400 |
| commit | a8d63c2fad0ca968b8685a0c134d9cdc8e5aae6c (patch) | |
| tree | 3fb67025e3f09d3c3cf2ccb55cd8cc3ed1518a5a /guides | |
| parent | bd5eba1adff8fa72429f5889ae26097e9756ceb0 (diff) | |
| parent | 1e2650acbb1178da7d24bb9cdac31920c2f75dc9 (diff) | |
| download | rails-a8d63c2fad0ca968b8685a0c134d9cdc8e5aae6c.tar.gz rails-a8d63c2fad0ca968b8685a0c134d9cdc8e5aae6c.tar.bz2 rails-a8d63c2fad0ca968b8685a0c134d9cdc8e5aae6c.zip | |
Merge pull request #33360 from jedrekdomanski/Update-active-record-querying-readme
Update documentation for #pluck method [ci skip]
Diffstat (limited to 'guides')
| -rw-r--r-- | guides/source/active_record_querying.md | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/guides/source/active_record_querying.md b/guides/source/active_record_querying.md index 944cee8a23..6c57cd8b8e 100644 --- a/guides/source/active_record_querying.md +++ b/guides/source/active_record_querying.md @@ -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: |