diff options
Diffstat (limited to 'actionpack/lib/action_view/helpers/active_record_helper.rb')
| -rw-r--r-- | actionpack/lib/action_view/helpers/active_record_helper.rb | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/actionpack/lib/action_view/helpers/active_record_helper.rb b/actionpack/lib/action_view/helpers/active_record_helper.rb index 08abdbd8a8..e2e35cb0bd 100644 --- a/actionpack/lib/action_view/helpers/active_record_helper.rb +++ b/actionpack/lib/action_view/helpers/active_record_helper.rb @@ -76,16 +76,21 @@ module ActionView # Returns a string containing the error message attached to the +method+ on the +object+ if one exists. # This error message is wrapped in a <tt>DIV</tt> tag, which can be extended to include a +prepend_text+ and/or +append_text+ - # (to properly explain the error), and a +css_class+ to style it accordingly. As an example, let's say you have a model + # (to properly explain the error), and a +css_class+ to style it accordingly. +object+ should either be the name of an instance variable or + # the actual object. As an example, let's say you have a model # +post+ that has an error message on the +title+ attribute: # # <%= error_message_on "post", "title" %> => # <div class="formError">can't be empty</div> # + # <%= error_message_on @post, "title" %> => + # <div class="formError">can't be empty</div> + # # <%= error_message_on "post", "title", "Title simply ", " (or it won't work).", "inputError" %> => # <div class="inputError">Title simply can't be empty (or it won't work).</div> def error_message_on(object, method, prepend_text = "", append_text = "", css_class = "formError") - if (obj = instance_variable_get("@#{object}")) && (errors = obj.errors.on(method)) + if (obj = (object.respond_to?(:errors) ? object : instance_variable_get("@#{object}"))) && + (errors = obj.errors.on(method)) content_tag("div", "#{prepend_text}#{errors.is_a?(Array) ? errors.first : errors}#{append_text}", :class => css_class) else '' @@ -101,6 +106,8 @@ module ActionView # * <tt>header_tag</tt> - Used for the header of the error div (default: h2) # * <tt>id</tt> - The id of the error div (default: errorExplanation) # * <tt>class</tt> - The class of the error div (default: errorExplanation) + # * <tt>object</tt> - The object (or array of objects) for which to display errors, + # if you need to escape the instance variable convention # * <tt>object_name</tt> - The object name to use in the header, or # any text that you prefer. If <tt>object_name</tt> is not set, the name of # the first object will be used. @@ -114,12 +121,21 @@ module ActionView # # error_messages_for 'user_common', 'user', :object_name => 'user' # + # If the objects cannot be located as instance variables, you can add an extra +object+ paremeter which gives the actual + # object (or array of objects to use) + # + # error_messages_for 'user', :object => @question.user + # # NOTE: This is a pre-packaged presentation of the errors with embedded strings and a certain HTML structure. If what # you need is significantly different from the default presentation, it makes plenty of sense to access the object.errors # instance yourself and set it up. View the source of this method to see how easy it is. def error_messages_for(*params) options = params.extract_options!.symbolize_keys - objects = params.collect {|object_name| instance_variable_get("@#{object_name}") }.compact + if object = options.delete(:object) + objects = [object].flatten + else + objects = params.collect {|object_name| instance_variable_get("@#{object_name}") }.compact + end count = objects.inject(0) {|sum, object| sum + object.errors.count } unless count.zero? html = {} |