I have an index in my User model that is creating redundant joins for
attributes I have defined. My model looks as follows:
class User < ActiveRecord::Base
has_many :relationships
has_many :groups, through: :relationships, conditions: Proc.new {
> ['relationships.type = ?', 'Group'] }
> has_many :organizations, through: :relationships, conditions: Proc.new
> { ['relationships.type = ?', 'Organization'] }
> has_many :roles, through: :relationships
>
define_index do
# fields
indexes first_name, sortable: true
indexes last_name, sortable: true
indexes email, sortable: true
indexes relationships.group(:name), as: :groups, sortable: true
indexes relationships.role(:name), as: :roles
> set_property field_weights: {
first_name: 15,
last_name: 15,
email: 7,
groups: 10
}
> has relationships(:type), as: :relationship_type, crc: true
has groups(:id), as: :group_id
has organizations(:id), as: :organization_id
has roles(:name), as: :role_name, crc: true
has created_at, updated_at
end
This produces the following query in the sphinx configuration:
SELECT
SQL_NO_CACHE `users`.`id` * CAST(5 AS SIGNED) + 4 AS `id` ,
`users`.`first_name` AS `first_name`
`users`.`last_name` AS `last_name`,
`users`.`email` AS `email`,
GROUP_CONCAT(DISTINCT IFNULL(`groups`.`name`, '0') SEPARATOR ' ') AS
> `groups`,
GROUP_CONCAT(DISTINCT IFNULL(`roles`.`name`, '0') SEPARATOR ' ') AS
> `roles`,
`users`.`id` AS `sphinx_internal_id`, 0 AS `sphinx_deleted`,
765557111 AS `class_crc`, IFNULL('User', '') AS
> `sphinx_internal_class`,
IFNULL(`users`.`first_name`, '') AS `first_name_sort`,
IFNULL(`users`.`last_name`, '') AS `last_name_sort`,
IFNULL(`users`.`email`, '') AS `email_sort`,
GROUP_CONCAT(DISTINCT IFNULL(IFNULL(`groups`.`name`, ''), '0')
> SEPARATOR ' ') AS `groups_sort`,
GROUP_CONCAT(DISTINCT IFNULL(CRC32(`relationships`.`type`), '0')
> SEPARATOR ',') AS `relationship_type`,
GROUP_CONCAT(DISTINCT IFNULL(`groups_users`.`id`, '0') SEPARATOR ',')
> AS `group_id`,
GROUP_CONCAT(DISTINCT IFNULL(`organizations`.`id`, '0') SEPARATOR ',')
> AS `organization_id`,
GROUP_CONCAT(DISTINCT IFNULL(CRC32(`roles_users`.`name`), '0')
> SEPARATOR ',') AS `role_name`,
UNIX_TIMESTAMP(`users`.`created_at`) AS `created_at`,
UNIX_TIMESTAMP(`users`.`updated_at`) AS `updated_at`
FROM `users`
LEFT OUTER JOIN `relationships` ON `relationships`.`user_id` =
> `users`.`id`
LEFT OUTER JOIN `groups` ON `groups`.`id` =
> `relationships`.`relationship_id`
LEFT OUTER JOIN `roles` ON `roles`.`id` = `relationships`.`role_id`
LEFT OUTER JOIN `relationships` `relationships_users_join` ON
> `relationships_users_join`.`user_id` = `users`.`id`
LEFT OUTER JOIN `groups` `groups_users` ON `groups_users`.`id` =
> `relationships_users_join`.`relationship_id` AND relationships.type =
> 'Group'
LEFT OUTER JOIN `relationships` `relationships_users_join_2` ON
> `relationships_users_join_2`.`user_id` = `users`.`id`
LEFT OUTER JOIN `organizations` ON `organizations`.`id` =
> `relationships_users_join_2`.`relationship_id` AND relationships.type =
> 'Organization'
LEFT OUTER JOIN `relationships` `relationships_users_join_3` ON
> `relationships_users_join_3`.`user_id` = `users`.`id`
LEFT OUTER JOIN `roles` `roles_users` ON `roles_users`.`id` =
> `relationships_users_join_3`.`role_id`
WHERE (`users`.`id` >= $start AND `users`.`id` <= $end)
GROUP BY `users`.`id` ORDER BY NULL
Everything is great up until the joins; it creates three extra unnecessary
joins (relationships_users_join_n) for the Group, Organization, and Roles
attributes. I have tried changing the attribute syntax from groups(:id) to
relationships.group(:id) but it fails to acknowledge the conditions that is
applied to the join that is defined by the has_many in the model. Other
than failing to acknowledge the condition, it solves my redundant join
issue.
Any help is greatly appreciated!
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