Rails 4：使用窗体过滤数据

Question

我有一些数据，我想让用户能够通过选择给定的日期范围来过滤这些数据。我可以用我自己的过滤器提供在控制器中的日期范围内操控数据：

def self.filter_chart(date_start = 2.years.ago.to_s, date_end = Date.today.to_s) 
    real_start = date_start.to_date 
    real_end = date_end.to_date 
    part_1 = PotentialClient.where('created_at >= ?', real_start) 
    part_2 = part_1.where('created_at <= ?', real_end) 

    return part_2 
end 

@clients = PotentialClient.filter_chart(2.days.ago.to_s, Date.today.to_s)

...但我希望用户能够选择的开始日期和结束日期，提交表单以显示该日期范围的数据。我如何构建一个表单/函数来做到这一点？

Answer 1

我已经在我目前的应用程序中完成了这项工作。这是表单视图。

<% 
    if params[:start_date].present? && params[:end_date].present? 
    start_date = Date.parse(params[:start_date]) 
    end_date = Date.parse(params[:end_date]) 
    else 
    start_date = Time.zone.today - 30.days 
    end_date = Time.zone.today 
    end 
%> 

<%= form_tag('', class: 'form', method: :post) do %> 
    <input type="text" class="form-control datepicker" name="start_date" value="<%= start_date.strftime("%Y-%m-%d") %>"> 
    <input type="text" class="form-control datepicker" name="end_date" value="<%= end_date.strftime("%Y-%m-%d") %>"> 
    <input type="submit" class="btn btn-primary" value="Run report"> 
<% end %> 

这里是您的报告控制器。

def create 
    if params[:start_date].present? && params[:end_date].present? 
    start_date = Date.parse(params[:start_date]) 
    end_date = Date.parse(params[:end_date]) 
    else 
    start_date = Time.zone.today - 30.days 
    end_date = Time.zone.today 
    end 

    start_date = Time.zone.parse(params[:start_date]).beginning_of_day 
    end_date = Time.zone.parse(params[:end_date]).end_of_day 
    report_data = PotentialClient.where('created_at >= ?', start_date).where('created_at <= ?', end_date) 
end