I've done this:
def update
@projeto = Projeto.find(params[:id])
## Here it finds one "permissao" with the user that i choose, the
profile that i choose and the project that i choose.
@ex_permissaoI = Permissao.find(:first, :conditions => ["usuario_id
= ? and perfil = ? and projeto_id = ?", Usuario.find(:first, :conditions
=> ["id = ?", @projeto.responsavel_td.to_i]), "Intermediário",
@projeto.id])
@ex_permissaoB = Permissao.find(:first, :conditions => ["usuario_id
= ? and perfil = ? and projeto_id = ?", Usuario.find(:first, :conditions
=> ["id = ?", @projeto.coordenador.to_i]), "Intermediário",
@projeto.id])
## Here it should destroy those "permissao"
@ex_permissaoI.destroy
@ex_permissaoB.destroy
if (@projeto.update_attributes(params[:projeto]))
(...)
end
And I get this error:
You have a nil object when you didn't expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.destroy
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