Question

运行我的应用程序时，我遇到了这个SQLite异常错误：

/ admin
中的SQLite3 :: SQLException
没有这样的专栏：subscription_plan.name

这是控制器代码，我遇到错误：

def dashboard
  @number = {
      :month => Subscription.includes(:subscription_plan).where(['subscriptions.created_at > ? AND subscriptions.amount > ? AND subscription_plan.name = ?', Time.zone.now.beginning_of_month, 0, 'month']).count,
      :year => Subscription.includes(:subscription_plan).where(['subscriptions.created_at > ? AND subscriptions.amount > ? AND subscription_plan.name = ?', Time.zone.now.beginning_of_month, 0, 'year']).count
    }
end

这是具有关系的订阅模型：

class Subscription < ActiveRecord::Base
  belongs_to :subscription_plan
end

我的应用程序中没有subscription_plan模型，但此表的数据是通过 seeds.rb 文件填充的。如控制器中所示，＆＃39; month＆＃39; year＆＃39; year＆＃39;是subscription_plan表中的一些名称。

Rails 3.2工作正常，我不知道为什么它不能使用4.2.6。请帮忙。

Answer 1

您需要提供条件而不是关联名称的表名，请尝试

Subscription.includes(:subscription_plan).where(['subscriptions.created_at > ? AND subscriptions.amount > ? AND subscription_plans.name = ?', Time.zone.now.beginning_of_month, 0, 'month'])

Answer 2

请你试试这个。

Subscription.includes(:subscription_plan).where(["subscriptions.created_at > ? AND subscriptions.amount > ? AND subscription_plans.name = ?", Time.zone.now.beginning_of_month, 0, 'month']).references(:subscription_plans)

Answer 3

您无需在where子句中引用订阅，请注意复数subscription_plans.name，并且从功能上来说，添加references(:subscription_plans)的注释就正确了

Subscription.includes(:subscription_plan).where(['created_at > ? AND amount > ? AND subscription_plans.name = ?, Time.zone.now.beginning_of_month, 0, 'month']).references(:subscription_plans).count

SQLite3 :: SQLException：rails 4.2.6中没有这样的列

3 个答案: