collection_select 从具有特定属性的实体中选择

Question

Hi I have the following collection_select tag:

<%=collection_select(:post, :applicant_id, Room.all, :room_number, :room_number, {selected: @applicant.room_number}, { :onchange=>"window.location='#{room_select_path(@applicant.id)}?room_number=' + this.value"})%>

Currently, it displays all room entities available.

What I want to do is to display all room entities with the attribute :room_type.

Answer 1

尝试这个

<%=collection_select(:post, :applicant_id, Room.where(room_type: "your_type_value"), :room_number, :room_number, {selected: @applicant.room_number}, { :onchange=>"window.location='#{room_select_path(@applicant.id)}?room_number=' + this.value"})%>