Sod will_paginate library

I have this code

def self.completa(estado_id, cidade_id, bairro_id, segmento_id, pagina, limit = 5)
campos_padrao.estado(estado_id).cidade(cidade_id).bairro(bairro_id).segmento(segmento_id).joins.paginate(:per_page => limit, :page => pagina)
  end


named_scope :campos_padrao, lambda { |*args| 
    {
      :select=> (args.first ||
                "anuncios.codcli,
                 anuncios.codseg,
                 anuncios.nomefanta,
                 anuncios.irmao,
                 anuncios.endereco,
                 anuncios.num,
                 anuncios.complemento,
                 anuncios.cep,
                 anuncios.bairro,
                 anuncios.cidade,
                 anuncios.uf,
                 anuncios.fone,
                 anuncios.fax,
                 anuncios.email,
                 anuncios.site,
                 anuncios.descricao,
                 anuncios.fig_anuncio,
                 anuncios.contrato,
                 anuncios.uf_anunciar,
                 anuncios.permalink,
                 cidades.cidade as cidade_nome,
                 estados.nome as estado_nome,
                 segmentos.nome as segmento
                  ") }
    }

named_scope :segmento, lambda { |*args|
    if (args.first != "todos_segmentos")
      { :conditions => ["anuncios.codseg = ?", args.first]  }
    else
      {  }
    end
  }
  
  named_scope :estado,  lambda { |*args| 
    {
      :conditions => ["anuncios.uf = ?", args.first]
    }
  }
  
  named_scope :cidade,  lambda { |*args|
    if (args.first != "todas_cidades")
      { :conditions => ["anuncios.cidade = ?", args.first]  }
    else
      {  }
    end
  }
  
  named_scope :bairro, lambda { |*args|
    if (args.first != "todos_bairros")
      { :conditions => ["anuncios.bairro LIKE ?", "%#{args.first}%"]  }
    else
      {  }
    end
  }

I get this error.

ctiveRecord::StatementInvalid (Mysql::Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '

             anuncios.codseg,
             anuncios.nomefanta,
    ' at line 1: SELECT count(anuncios.codcli,
             anuncios.codseg,
             anuncios.nomefanta,
             anuncios.irmao,
             anuncios.endereco,
             anuncios.num,
             anuncios.complemento,
             anuncios.cep,
             anuncios.bairro,
             anuncios.cidade,
             anuncios.uf,
             anuncios.fone,
             anuncios.fax,
             anuncios.email,
             anuncios.site,
             anuncios.descricao,
             anuncios.fig_anuncio,
             anuncios.contrato,
             anuncios.uf_anunciar,
             anuncios.permalink,
             cidades.cidade as cidade_nome,
             estados.nome as estado_nome,
             segmentos.nome as segmento
              ) AS count_anuncios_codcli_anuncios_codseg_anuncios_nomefanta_anuncios_irmao_anuncios_endereco_anuncios_num_anuncios_complemento_anuncios_cep_anuncios_bairro_anuncios_cidade_anuncios_uf_anuncios_fone_anuncios_fax_anuncios_email_anuncios_site_anuncios_descricao FROM `anuncios`   INNER JOIN `estados` ON `estados`.uf = `anuncios`.uf  INNER JOIN `cidades` ON `cidades`.codcid = `anuncios`.cidade  INNER JOIN `segmentos` ON `segmentos`.codseg = `anuncios`.codseg  WHERE (anuncios.uf = 'AC') ):

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