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| author | Vijay Dev <vijaydev.cse@gmail.com> | 2011-07-23 01:59:46 +0530 |
|---|---|---|
| committer | Vijay Dev <vijaydev.cse@gmail.com> | 2011-07-23 01:59:46 +0530 |
| commit | 573c6e6982224e6817174d2f9c288b6ddc938608 (patch) | |
| tree | 4e845e9dfadd841b0745b631418ae5f4a1ba7930 | |
| parent | ccb3af468328270b38e4a31ee0e353fd1d7ec327 (diff) | |
| download | rails-573c6e6982224e6817174d2f9c288b6ddc938608.tar.gz rails-573c6e6982224e6817174d2f9c288b6ddc938608.tar.bz2 rails-573c6e6982224e6817174d2f9c288b6ddc938608.zip | |
document the change in edge rails which makes a more strict check on the arity of the dynamic finders
| -rw-r--r-- | railties/guides/source/active_record_querying.textile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/railties/guides/source/active_record_querying.textile b/railties/guides/source/active_record_querying.textile index 082f9eda7d..8ea06d28aa 100644 --- a/railties/guides/source/active_record_querying.textile +++ b/railties/guides/source/active_record_querying.textile @@ -1016,6 +1016,7 @@ You can specify an exclamation point (<tt>!</tt>) on the end of the dynamic find If you want to find both by name and locked, you can chain these finders together by simply typing +and+ between the fields. For example, +Client.find_by_first_name_and_locked("Ryan", true)+. +WARNING: Up to and including Rails 3.1, when the number of arguments passed to a dynamic finder method is lesser than the number of fields, say <tt>Client.find_by_name_and_locked("Ryan")</tt>, the behavior is to pass +nil+ as the missing argument. This is *unintentional* and this behavior will be changed in Rails 3.2 to throw an +ArgumentError+. There's another set of dynamic finders that let you find or create/initialize objects if they aren't found. These work in a similar fashion to the other finders and can be used like +find_or_create_by_first_name(params[:first_name])+. Using this will first perform a find and then create if the find returns +nil+. The SQL looks like this for +Client.find_or_create_by_first_name("Ryan")+: |