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

Question

I am facing this SQLite exception error when running my application:

SQLite3::SQLException at /admin

no such column: subscription_plan.name

This is the controller code, I am facing error:

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

This is Subscription model with relation:

class Subscription < ActiveRecord::Base
  belongs_to :subscription_plan
end

There is no subscription_plan model in my application, but the data to this table is populated through seeds.rb file. As shown in the controller, 'month', 'year' are some of the names in subscription_plan table.

It is working fine with Rails 3.2, i don't know why it's not working with 4.2.6. Please help.

Answer 1

您需要提供条件中的表名而不是关联名，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

你可以试试这个吗？

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power中获得的注释就可以正确地添加references(:subscription_plans)

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