How to call a method?

I have a method find_all_media in model abc.rb. Model xyz and abc has relationship, 
abc :has_many xyzs and
xyz :belongs_to abc



# abc.rb

method is in abc model
def self.find_all_media(media_name)

  if self.media_name == self.xyz.media_name
     return media_name
  end
end 

### view file
<% @abc.xyzs.each do |xyz| %>
<tr>
<td><%=h xyz.media_name %>开发者_JAVA技巧</td>
<td><%=h xyz.type %></td>
<td>I want to call method find all_media here ?? </td>
</tr>


I tried but not working, any 

Seems like your

def self.find_all_media(media_name)

  if self.media_name == self.xyz.media_name
     return media_name
  end
end 

Method is a class method (self). So, you are trying to access you class method from your class instance

@abc

You have two options

1 - Make the method an instance method (by removing the 'self')

2 - Call your method as Abc.find_all_media

And just as a best practice,

Do not call models directly from your views, Do it through the controller, or helper

and if your 'find_all_media' method is someting to do with database query consider

:scope (in rails 3.x) (named_scope in rails 2.x)

HTH

sameera

Use Abc.find_all_media. If youi use self in method name it means this method is going to be used with model itself, not with object. Hope it'll help