具有多个条件的范围基于多个条件的条件

Posted 2021-05-02

是否有可能使用类似的东西

  scope :state, ->(state) {
    merge(where("start_time <= ? and end_time >= ?", Time.now.utc.beginning_of_day, Time.now.utc.beginning_of_day)) if state.include?("open")
    merge(where("end_time < ?", Time.now.utc.beginning_of_day)) if state.include?("closed")
    merge(where("start_time > ?", Time.now.utc.beginning_of_day)) if state.include?("upcoming")
  }

如果我使用此范围，则只有最后一个范围有效。

例如：

• state（[“coming”]） - >工作
• state（[“open”]） - >不使用的地方
• state（[“deleted”]，[“coming”]） - >仅限使用即将到来的条件的地方

答案

希望这能解决你的问题。

scope :state, ->(state) {where(self.query_conditions(state), q: Time.now.utc.beginning_of_day))}

def self.query_conditions(state)
  q = ""
  q+= "start_time <= :q and end_time >= :q" if state.include?("open")
  q+= " and end_time < :q" if state.include?("closed")
  q+= " and start_time > :q" if state.include?("upcoming")
  q
end

另一答案

你应该可以使用

  scope :state, ->(state) {
    rel = all
    rel = rel.where("start_time <= ? and end_time >= ?", Time.now.utc.beginning_of_day, Time.now.utc.beginning_of_day) if state.include?("open")
    rel = rel.where("end_time < ?", Time.now.utc.beginning_of_day) if state.include?("closed")
    rel = rel.where("start_time > ?", Time.now.utc.beginning_of_day) if state.include?("upcoming")
    rel
  }

请注意，你应该这样做

state(["deleted", "upcoming"])

代替

state(["deleted"], ["upcoming"])

您也可以使用Array.wrap来简化范围的使用：

  scope :state, ->(state) {
    state = Array.wrap(state)
    rel = all
    rel = rel.where("start_time <= ? and end_time >= ?", Time.now.utc.beginning_of_day, Time.now.utc.beginning_of_day) if state.include?("open")
    rel = rel.where("end_time < ?", Time.now.utc.beginning_of_day) if state.include?("closed")
    rel = rel.where("start_time > ?", Time.now.utc.beginning_of_day) if state.include?("upcoming")
    rel
  }

在状态被包装的情况下，您可以通过以下两种方式使用范围：

Model.state(['open', 'upcoming'])
Model.state('open', 'upcoming')