Question

我对这个HABTM协会感到疯狂。

我有2个班级

(c2)a.x

品牌类表位于另一个数据库中。

我有我的迁移

class Brand < ApplicationRecord
  establish_connection Rails.application.config.dday_companies_database_configuration
  scope :default_order, -> { order :name }
  has_and_belongs_to_many :contents, join_table: :brands_contents, foreign_key: :content_id
end

class Content < ApplicationRecord
 has_and_belongs_to_many :brands, class_name: 'Brand', join_table: :brands_contents, association_foreign_key: :brand_id
end

所以我有我的联接表

    class CreateContentBrandJoinTable < ActiveRecord::Migration[5.1]
  def change
    create_join_table :brands, :contents do |t|
      t.index [:brand_id, :content_id]
    end
  end
end

当我尝试我的关联时，我有这个错误

[6] pry（main）＆gt; c.brands.first ActiveRecord :: StatementInvalid： PG :: UndefinedTable：错误：关系＆＃34; content_brands＆＃34;不存在第8行：a.attrelid = ＆＃39;＆＃34; content_brands＆＃34;＆＃39; :: regcla ... ^：选择a.attname，format_type（a.atttypid，a.atttypmod）， pg_get_expr（d.adbin，d.adrelid），a.attnotnull，a.atttypid，a.atttypmod， c.collname，col_description（a.attrelid，a.attnum）AS评论来自pg_attribute a LEFT JOIN pg_attrdef d ON a.attrelid = d.adrelid AND a.attnum = d.adnum LEFT JOIN pg_type t ON a.atttypid = t.oid LEFT JOIN pg_collation c ON a.attcollation = c.oid AND a.attcollation＆lt;＆gt; t.typcollation 在哪里a.attrelid =＆＃39;＆＃34; content_brands＆＃34;＆＃39; :: regclass 和a.attnum＆gt; 0而不是a.attisdropped 订购a.attnum

为什么要寻找-- -- Name: brands_contents; Type: TABLE; Schema: public; Owner: - -- CREATE TABLE brands_contents ( brand_id integer NOT NULL, content_id bigint NOT NULL ); ??

已经和属于许多协会并不起作用

0 个答案: