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我有按树排列的组织。我要求为树中的不同根设置不同的命名方案。一个用户可能希望在“Region”上方名为“Corporate”的树的顶层，然后是“Division”，而另一个用户可能希望在“All”下方有“Sections”。每个人都有自己的内部术语，他们希望在表格等上显示它​​们。

有很多宝石可以简单地管理等级关系，我认为它们中的任何一个都不一定更好或更坏。我是 Rails 的新手，来自更重的 SQL 背景。编写一个查询来获得我想要的东西非常简单，尤其是在跟踪节点的深度时，但这看起来不像是轨道方式。我有一个想法，我可以在 organizations 表中维护一个 organization_scheme_id，但是从那里将其与实际级别相关联并不那么清楚。

以下模式/模型假设我正在使用 Ancestry，但我至少没有与其中任何一个结婚。

class Organization < ActiveRecord::Base
  has_ancestry :cache_depth => true, :orphan_strategy => :adopt, :depth_cache_column => :depth
  validates :name, presence: true
  has_one :organization_scheme
end

class OrganizationLevel < ActiveRecord::Base
  validates :name, presence: true
  has_one :organization_scheme
end

class OrganizationScheme < ActiveRecord::Base
  belongs_to :organization
  belongs_to :organization_level
end

create_table "organization_levels", id: false, force: true do |t|
  t.uuid     "id",                     null: false
  t.string   "name"
  t.integer  "depth"
  t.uuid     "organization_scheme_id"
  t.datetime "created_at"
  t.datetime "updated_at"
end

add_index "organization_levels", ["organization_scheme_id", "depth"], name: "index_organization_levels_on_organization_scheme_id_and_depth", using: :btree

create_table "organization_schemes", id: false, force: true do |t|
  t.uuid     "id",         null: false
  t.string   "name"
  t.datetime "created_at"
  t.datetime "updated_at"
end

create_table "organizations", id: false, force: true do |t|
  t.uuid     "id",                     null: false
  t.string   "name"
  t.string   "string"
  t.integer  "depth"
  t.string   "ancestry"
  t.uuid     "organization_scheme_id"
  t.datetime "created_at"
  t.datetime "updated_at"
end

add_index "organizations", ["ancestry"], name: "index_organizations_on_ancestry", using: :btree
add_index "organizations", ["organization_scheme_id", "depth"], name: "index_organizations_on_organization_scheme_id_and_depth", using: :btree

create_table "organizations_users", id: false, force: true do |t|
  t.uuid "user_id"
  t.uuid "organization_id"
end

add_index "organizations_users", ["organization_id", "user_id"], name: "index_organizations_users_on_organization_id_and_user_id", using: :btree
add_index "organizations_users", ["user_id", "organization_id"], name: "index_organizations_users_on_user_id_and_organization_id", using: :btree
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