Rails Nested Attributes Mass Assignment Error -

i have user model cannot create client due being unwritable in mass assignment.

how make can create client model?

code , error found here: http://pastie.org/1206482

i think have add:

attr_accessible :client_attributes 

to user model. client_attributes hash in user hash posted create action.

the transmitted hash looks this: :user => { :username => "one", ..., :client_attributes => { :name => "client" } }