Conditional issue using relationship - ruby-on-rails

Question

I'm trying to search a column from another table using three tables in relationship.
In my view policy_vehicles I have a text_field_tag and want to search by "raz_soc".
My tables are:
Policy_vehicles
|id| |policy_id|
integer integer
100 1
200 2
Policies
|id| |client_id|
integer integer
1 1
2 2
Clients
|id| |raz_soc|
integer varchar(255)
1 MARATEX SAC
2 ATT
This is my controller:
class PolicyManagement::PolicyController < ApplicationController
def generate_print_per_vehicle
params[:search_policy_id] = Policy.find(:all,:joins => :client ,:conditions => ['raz_soc LIKE ?',"%#{params[:search_raz_soc]}%" ])
#policies= PolicyVehicle.find(:all,:joins => :policy, :conditions => ['policy_id = ?',params[:search_policy_id] ])
end
end
This is my model:
class Policy < ActiveRecord::Base
belongs_to :client
has_many :policy_vehicles
end
class PolicyVehicle < ActiveRecord::Base
belongs_to :policy
end
class Client < ActiveRecord::Base
has_many :policies
end
This is my view where I'm trying to find by a column from another table:
<% form_tag :controller=>"policy_management/policy",:action=>"generate_print_per_vehicle" do %>
Society:
<%= text_field_tag "search_raz_soc",params[:search_raz_soc] %>
<%= submit_tag "Buscar", :name => nil %>
<% end %>
My logs are:
Mysql::Error: Operand should contain 1 column(s): SELECT `policy_vehicles`.* FROM `policy_vehicles` INNER JOIN `policies` ON `policies`.id = `policy_vehicles`.policy_id WHERE (policy_id = 166,1540,2822,4074)
It should be a search like this:
Policy Load (3.1ms) SELECT `policies`.* FROM `policies` INNER JOIN `clients` ON `clients`.id = `policies`.client_id WHERE (raz_soc = 'MARATEX SAC')
PolicyVehicle Load (0.3ms) SELECT `policy_vehicles`.* FROM `policy_vehicles` INNER JOIN `policies` ON `policies`.id = `policy_vehicles`.policy_id WHERE (policy_id = 1)
I tried this but is not working:
#controller
#policy = Policy.find(:all,:joins => :client ,:conditions => ['raz_soc LIKE ?',params[:search_raz_soc] ])
#policies= PolicyVehicle.find(:all,:joins => :policy, :conditions => ['policy_id = ?',#policy ])
#logs
Policy Load (3.1ms) SELECT `policies`.* FROM `policies` INNER JOIN `clients` ON `clients`.id = `policies`.client_id WHERE (raz_soc = 'MARATEX SAC')
PolicyVehicle Load (0.3ms) SELECT `policy_vehicles`.* FROM `policy_vehicles` INNER JOIN `policies` ON `policies`.id = `policy_vehicles`.policy_id WHERE (policy_id = 70353610714140)
I'm trying to do something like this
select * from policy_vehicles where policy_id
IN ( SELECT id FROM policies WHERE
client_id IN (SELECT id FROM clients raz_soc = ?) )
Can someone can help me please?

Answer 1

Try this (I have explained what the queries return so make sure that this is what you want from them)
#policies = Policy.find(:all,:joins => :client ,
:conditions => ['raz_soc LIKE ?',"%#{params[:search_raz_soc]}%"] )
# returns an array of policy records based on the raz_soc condition on client
#policy_vehicles = PolicyVehicle.find(:all,:joins => :policy,
:conditions => ['policy_id IN (?)',#policies] )
# returns an array of policy_vehicles that are associated with any record in the #policies array
Other option is to do it in a single query as:
#policy_vehicles = PolicyVehicle.joins(:policy => :client).
where('clients.raz_soc LIKE ?',"%#{params[:search_raz_soc]}%")