未知屬性錯誤父ID，只有在測試

Question

發生的事情我有題目列表（父）和主題（孩子）模型

class TopicList < ApplicationRecord 
    has_many :topics 
    validates :name, presence: true , uniqueness: { case_sensitive: false } 
end 

class Topic < ApplicationRecord 
    belongs_to :topic_list 
    validates :topic_list_id, presence: true 
    validates :name, presence: true, uniqueness: { case_sensitive: false } 
end 

的schema.rb包括：

ActiveRecord::Schema.define(version: 20161116031922) do 

    create_table "topic_lists", force: :cascade do |t| 
    t.string "name" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    t.index ["name"], name: "index_topic_lists_on_name", unique: true 
    end 

    create_table "topics", force: :cascade do |t| 
    t.string "name" 
    t.string "source" 
    t.integer "position" 
    t.integer "topic_list_id" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    t.index ["name"], name: "index_topics_on_name", unique: true 
    t.index ["position"], name: "index_topics_on_position" 
    t.index ["topic_list_id"], name: "index_topics_on_topic_list_id" 
    end 

我topic_test.rb首先創建一個新的TopicList並在其下創建一個Topic：

require 'test_helper' 

class TopicTest < ActiveSupport::TestCase 
    def setup 
    @topic_list = TopicList.new(name: "Vocab") 
    @topic_list.save 
    @topic = @topic_list.topics.build(name: "Topic 1") 
    end 

    test "should be valid" do 
    assert @topic.valid? 
    end 
end 

每當我運行此測試時，出現錯誤：

ActiveModel::UnknownAttributeError: unknown attribute 'topic_list_id' for Topic. 

但是當我在我的導軌控制檯中嘗試相同的序列時，它工作得很好。

Loading development environment (Rails 5.0.0.1) 
>> list = TopicList.new(name: "List 1") 
=> #<TopicList id: nil, name: "List 1", created_at: nil, updated_at: nil> 
>> list.save 
    (0.1ms) begin transaction 
    TopicList Exists (0.3ms) SELECT 1 AS one FROM "topic_lists" WHERE LOWER("topic_lists"."name") = LOWER(?) LIMIT ? [["name", "List 1"], ["LIMIT", 1]] 
    SQL (0.3ms) INSERT INTO "topic_lists" ("name", "created_at", "updated_at") VALUES (?, ?, ?) [["name", "List 1"], ["created_at", 2016-11-16 21:23:33 UTC], ["updated_at", 2016-11-16 21:23:33 UTC]] 
    (11.3ms) commit transaction 
=> true 
>> topic = list.topics.build(name: "TopiC#1") 
=> #<Topic id: nil, name: "TopiC#1", source: nil, position: nil, topic_list_id: 3, created_at: nil, updated_at: nil> 
>> topic.valid? 
    Topic Exists (0.2ms) SELECT 1 AS one FROM "topics" WHERE LOWER("topics"."name") = LOWER(?) LIMIT ? [["name", "TopiC#1"], ["LIMIT", 1]] 
=> true 
>> 

每一個類似的問題，我已經在這裏發現了不正確的首字母大寫，snake_case，或複數/單名交易。我想我已經在這裏做了所有正確的事情。我錯過了什麼？

Answer 1

我跑rails db:test:load，並清除它。不知道爲什麼有時需要但不是其他人。