ruby on rails 中的 SQL Like 运算符 [英] SQL Like operator in ruby on rails

问题描述

我有一个任务来选择搜索那些名字以参数值开头的学生，以及所选值中的城市.如何在 ruby​​ on rails 中进行设置?我确实喜欢这个，但这不起作用控制器

I had got a task to select search the students those name start with param value and city in the selected value.How can i set in ruby on rails? i did like this but this is not working controller

 def list

    studentcount=Student.count()
    puts studentcount
    @studentname = Student.where("name name1 AND city = :cityId1",
    {:name1 => params[:name], :cityId1 => params[:cityId]})

    puts 'studentname'
    puts @studentname.inspect
    @students = Student.limit(params[:jtPageSize]).offset(params[:jtStartIndex]).order(params[:jtSorting])

    @jtable = {'Result' => 'OK','Records' => @students.map(&:attributes), :TotalRecordCount => studentcount}

    respond_to do |format|
      format.html # index.html.erb
      format.json { render :json => @jtable}
    end
  end

推荐答案

尝试:

@studentname = Student.where("name LIKE :name1 AND city = :cityId1",
  {:name1 => "#{params[:name]}%", :cityId1 => params[:cityId]})

这是一个相当肮脏的解决方案，但纯 ARel 无法按照您希望的方式处理这种情况.您可能想尝试 Sqeel gem.

This is a rather dirty solution, but pure ARel cannot handle this case the way you desire. You might want to try the Sqeel gem.

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