entities = [#<Entity:0x0055f364d9cd78 @name="entity-B", @internal_asn_number=64514, @classification_id="B">,#<Entity:0x0055f364d89070 @name="entity-A", @internal_asn_number=64513, @classification_id="A">]

array_hashes = [{"rulename"=>"entity-B_source_fqdn_1", "if"=>{"source.fqdn"=>"mail.tec.dsr.entityB.com"}, "then"=>{"event_description.text"=>"B"}}, {"rulename"=>"entity-B_destination_fqdn_1", "if"=>{"destination.fqdn"=>"mail.tec.dsr.entity_B.com"}, "then"=>{"event_description.text"=>"B"}}, {"rulename"=>"entity-A_source_fqdn_1", "if"=>{"source.fqdn"=>"194-65-57-128.entityA.com"}, "then"=>{"event_description.text"=>"A"}}, {"rulename"=>"entity-A_destination_fqdn_1", "if"=>{"destination.fqdn"=>"194-65-57-128.entityA.com"}, "then"=>{"event_description.text"=>"A"}}]

path = "/home/mf370/Desktop/RubyProject/"
file_name = "_url_fqdn.conf"

 entities.each do |entity|
    File.open(path + entity.name + file_name, "w") do |f|
      array_hashes.each do |rule|
          if rule['rulename'].match(entity.name)
            f.write(JSON.pretty_generate([rule]))
          end
      end
    end

[
  {
    "rulename": "entity-A_source_fqdn_1",
    "if": {
      "source.fqdn": "194-65-57-128.entityA.com"
    },
    "then": {
      "event_description.text": "A"
    }
  }
][
  {
    "rulename": "entity-A_destination_fqdn_1",
    "if": {
      "destination.fqdn": "194-65-57-128.entityA.com"
    },
    "then": {
      "event_description.text": "A"
    }
  }
]

[
  {
    "rulename": "entity-A_source_fqdn_1",
    "if": {
      "source.fqdn": "194-65-57-128.entityA.com"
    },
    "then": {
      "event_description.text": "A"
    }
  },
  {
    "rulename": "entity-A_destination_fqdn_1",
    "if": {
      "destination.fqdn": "194-65-57-128.entityA.com"
    },
    "then": {
      "event_description.text": "A"
    }
  }
]