diff options
Diffstat (limited to 'activerecord/lib/active_record/associations.rb')
| -rw-r--r-- | activerecord/lib/active_record/associations.rb | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/activerecord/lib/active_record/associations.rb b/activerecord/lib/active_record/associations.rb index 265bad7bc2..ac1479ad8f 100644 --- a/activerecord/lib/active_record/associations.rb +++ b/activerecord/lib/active_record/associations.rb @@ -774,16 +774,15 @@ module ActiveRecord # In the above example posts with no approved comments are not returned at all, because # the conditions apply to the SQL statement as a whole and not just to the association. # + # You must disambiguate column references for this fallback to happen, for example + # <tt>order: "author.name DESC"</tt> will work but <tt>order: "name DESC"</tt> will not. + # # If you want to load all posts (including posts with no approved comments) then write # your own LEFT OUTER JOIN query using ON # - # Post.joins('LEFT OUTER JOIN comments ON comments.post_id = posts.id AND comments.approved = true') - # - # You must disambiguate column references for this fallback to happen, for example - # <tt>order: "author.name DESC"</tt> will work but <tt>order: "name DESC"</tt> will not. + # Post.joins("LEFT OUTER JOIN comments ON comments.post_id = posts.id AND comments.approved = '1'") # - # If you do want eager load only some members of an association it is usually more natural - # to include an association which has conditions defined on it: + # In this case it is usually more natural to include an association which has conditions defined on it: # # class Post < ActiveRecord::Base # has_many :approved_comments, -> { where approved: true }, class_name: 'Comment' |