kotovalexarian-likes-github/rails--rails
1
0
Fork 0
mirror of https://github.com/rails/rails.git synced 2022-11-09 12:12:34 -05:00
Code Releases Activity

Merge pull request #23299 from CollinGraves/patch-1

Browse source 
English explanation to multi-level nested join
This commit is contained in:
प्रथमेश Sonpatki 2016-01-28 10:00:52 +05:30
commit 1ac3fb9f06
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
guides/source/active_record_querying.md
View file

@ -1085,6 +1085,8 @@ SELECT categories.* FROM categories
INNER JOIN tags ON tags.article_id = articles.id INNER JOIN tags ON tags.article_id = articles.id
``` ```
Or, in English: "return all categories that have articles, where those articles have a comment made by a guest, and where those articles also have a tag."
#### Specifying Conditions on the Joined Tables #### Specifying Conditions on the Joined Tables
You can specify conditions on the joined tables using the regular [Array](#array-conditions) and [String](#pure-string-conditions) conditions. [Hash conditions](#hash-conditions) provide a special syntax for specifying conditions for the joined tables: You can specify conditions on the joined tables using the regular [Array](#array-conditions) and [String](#pure-string-conditions) conditions. [Hash conditions](#hash-conditions) provide a special syntax for specifying conditions for the joined tables: