在轨道上的ruby中的SQL Like运算符

Question

我有一个任务是选择搜索学生那些名字以param值和所选值的城市开头.我怎么能在轨道上设置ruby？我确实喜欢这个,但这不是控制器

 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

Answer 1

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,但纯粹的ARel无法按照您的方式处理这种情况.您可能想尝试Sqeel 宝石.

Answer 2

尝试

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