>> Preference.find(:first)
=> #<Preference id: 19, lock_version: 0, login_id: 17, prefs: {"cost_centers"=>[110, 109], "activities"=>[105], "locations"=>[566432], "service_groups"=>[3]}>
>> Preference.find(:first).login
=> nil
>> Preference.find(:all).collect(&:login)
=> [nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil]
>> Login.find(17)
=> #<Login id: 17, create_time: "2007-08-07 08:46:25", create_cred: "---
party_id: 0
ip_addr: "::1/128"
db_user: yossef...", update_time: nil, update_cred: nil, lock_version: 0, party_id: 67, username: "casemanager", email: "casemanager@centerstone.org", crypted_password: "583069319bcf190281dc4ec204203f39162c3816", salt: "62a636a58d0648eadf7410aa2e4444866174c96e", grace_logins: 2, last_login: "2007-08-07 07:46:25", is_active: true, password_expiry: "2007-10-07 08:46:25", reason: "New Login Created">
>> Preference.find(:first)
=> #<Preference id: 19, lock_version: 0, login_id: 17, prefs: {"cost_centers"=>[110, 109], "activities"=>[105], "locations"=>[566432], "service_groups"=>[3]}>
>> pref = _
=> #<Preference id: 19, lock_version: 0, login_id: 17, prefs: {"cost_centers"=>[110, 109], "activities"=>[105], "locations"=>[566432], "service_groups"=>[3]}>
>> pref.login
=> nil
>> pref.reload
=> #<Preference id: 19, lock_version: 0, login_id: 17, prefs: {"cost_centers"=>[110, 109], "activities"=>[105], "locations"=>[566432], "service_groups"=>[3]}>
>> pref.login
=> nil
>> pref.login(true)
=> nil
>> l = Login.find(17)
=> #<Login id: 17, create_time: "2007-08-07 08:46:25", create_cred: "---
party_id: 0
ip_addr: "::1/128"
db_user: yossef...", update_time: nil, update_cred: nil, lock_version: 0, party_id: 67, username: "casemanager", email: "casemanager@centerstone.org", crypted_password: "583069319bcf190281dc4ec204203f39162c3816", salt: "62a636a58d0648eadf7410aa2e4444866174c96e", grace_logins: 2, last_login: "2007-08-07 07:46:25", is_active: true, password_expiry: "2007-10-07 08:46:25", reason: "New Login Created">
>> l.preference
=> #<Preference id: 19, lock_version: 0, login_id: 17, prefs: {"cost_centers"=>[110, 109], "activities"=>[105], "locations"=>[566432], "service_groups"=>[3]}>
>> l.preference.login
=> nil
>>