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Diffstat (limited to 'activerecord/CHANGELOG')
| -rw-r--r-- | activerecord/CHANGELOG | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/activerecord/CHANGELOG b/activerecord/CHANGELOG index 0dccedcf1f..95544950e9 100644 --- a/activerecord/CHANGELOG +++ b/activerecord/CHANGELOG @@ -1,5 +1,34 @@ *SVN* +* Added cascading eager loading that allows for queries like Author.find(:all, :include=> { :posts=> :comments }), which will fetch all authors, their posts, and the comments belonging to those posts in a single query (using LEFT OUTER JOIN) #3913 [anna@wota.jp]. Examples: + + # cascaded in two levels + >> Author.find(:all, :include=>{:posts=>:comments}) + => authors + +- posts + +- comments + + # cascaded in two levels and normal association + >> Author.find(:all, :include=>[{:posts=>:comments}, :categorizations]) + => authors + +- posts + +- comments + +- categorizations + + # cascaded in two levels with two has_many associations + >> Author.find(:all, :include=>{:posts=>[:comments, :categorizations]}) + => authors + +- posts + +- comments + +- categorizations + + # cascaded in three levels + >> Company.find(:all, :include=>{:groups=>{:members=>{:favorites}}}) + => companies + +- groups + +- members + +- favorites + * Make counter cache work when replacing an association #3245 [eugenol@gmail.com] * Make migrations verbose [Jamis Buck] |