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| author | Neeraj Singh <neerajdotname@gmail.com> | 2010-11-20 21:01:15 -0500 |
|---|---|---|
| committer | Neeraj Singh <neerajdotname@gmail.com> | 2010-11-20 21:01:15 -0500 |
| commit | 7b503f02ca2a8ac46e17e447b92d4a68fcc4a356 (patch) | |
| tree | 935068945b52b650aebdecb75496d5fbd1fa89a3 | |
| parent | 69d47a00c7e43e2431aa1b164a2e6309da1bf118 (diff) | |
| parent | 074782eda2caddb054d20a99e8d167ef8e1eecd2 (diff) | |
| download | rails-7b503f02ca2a8ac46e17e447b92d4a68fcc4a356.tar.gz rails-7b503f02ca2a8ac46e17e447b92d4a68fcc4a356.tar.bz2 rails-7b503f02ca2a8ac46e17e447b92d4a68fcc4a356.zip | |
Merge branch 'master' of github.com:lifo/docrails
| -rw-r--r-- | actionpack/lib/action_view/partials.rb | 5 | ||||
| -rw-r--r-- | railties/guides/source/active_record_validations_callbacks.textile | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/actionpack/lib/action_view/partials.rb b/actionpack/lib/action_view/partials.rb index 844c3e9572..cd3f130dc4 100644 --- a/actionpack/lib/action_view/partials.rb +++ b/actionpack/lib/action_view/partials.rb @@ -75,6 +75,11 @@ module ActionView # # <%= render :partial => "ad", :collection => @advertisements, :spacer_template => "ad_divider" %> # + # If the given <tt>:collection</tt> is nil or empty, <tt>render</tt> will return nil. This will allow you + # to specify a text which will displayed instead by using this form: + # + # <%= render(:partial => "ad", :collection => @advertisements) || "There's no ad to be displayed" %> + # # NOTE: Due to backwards compatibility concerns, the collection can't be one of hashes. Normally you'd also # just keep domain objects, like Active Records, in there. # diff --git a/railties/guides/source/active_record_validations_callbacks.textile b/railties/guides/source/active_record_validations_callbacks.textile index 444a1d4154..9ddbe6fadc 100644 --- a/railties/guides/source/active_record_validations_callbacks.textile +++ b/railties/guides/source/active_record_validations_callbacks.textile @@ -141,7 +141,7 @@ end h4(#validations_overview-errors). +errors[]+ -To verify whether or not a particular attribute of an object is valid, you can use +errors[:attribute]+ that returns an array with all attribute errors, when there are no errors on the specified attribute, an empty array is returned. +To verify whether or not a particular attribute of an object is valid, you can use +errors[:attribute]+. It returns an array of all the errors for +:attribute+. If there are no errors on the specified attribute, an empty array is returned. This method is only useful _after_ validations have been run, because it only inspects the errors collection and does not trigger validations itself. It's different from the +ActiveRecord::Base#invalid?+ method explained above because it doesn't verify the validity of the object as a whole. It only checks to see whether there are errors found on an individual attribute of the object. |