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我希望有人能幫助我。 我有一個名爲「location_location_relationships」的表。如果您創建一個新條目，則可以選擇來自「locaions」表的兩個位置（前導和後繼）。另外，您可以選擇一個旅程。這些來自桌子「旅遊」。地點選擇正在工作。但巡演會產生一些問題。首先，我沒有在模型中一切正常，但所選內容中沒有寫入名稱，而是寫入了「location_location_relationships」表中的ID。但我想要那裏的名字。所以我完成了「旅遊」和「location_location_relationships」的模型。在選擇有現在的旅遊名稱，但如果我按下按鈕「創建」，我得到一個錯誤按摩： 預期，得到的字符串（＃1848192）f.collection_select姓名
遊覽（＃96769428）它顯示我的錯誤在location_location_relationship_controller.rb： 「DEF創建
@location_location_relationship = LocationLocationRelationship.new(location_location_relationship_params)'
有沒有人一個想法，我做錯了什麼？
非常感謝您的幫助提前！
這是我location_location_relationships_form.html.erb其中collection_select是：
<%= form_for(@location_location_relationship) do |f| %>
<% if @location_location_relationship.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@location_location_relationship.errors.count, "error") %> prohibited this location_location_relationship from being saved:</h2>
<ul>
<% @location_location_relationship.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label 'Von Ort' %><br />
<%= f.collection_select :predecessor_id, Location.all, :id, :name %>
</div>
<div class="field">
<%= f.label 'Zu Ort' %><br />
<%= f.collection_select :successor_id, Location.all, :id, :name %>
</div>
<div class="field">
<%= f.label 'Tour' %><br>
<%= f.collection_select :tour, Tour.all, :id, :name_of_tour, prompt: true %>
</div>
<div class="field">
<%= f.label 'Distanz' %><br>
<%= f.text_field :distance, type: "number", min:0 %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
我的location_location_relationships的模型：
class LocationLocationRelationship < ActiveRecord::Base
belongs_to :successor, class_name: "Location"
belongs_to :predecessor, class_name: "Location"
validates :successor_id, presence: true
validates :predecessor_id, presence: true
belongs_to :tour
validates :tour, presence: true
validates :distance, :numericality => true
# validates :sequence, :numericality => {:only_integer => true}
# validates :binary_variable, :numericality => {:only_integer => true}
end
我的旅遊模式：
class Tour < ActiveRecord::Base
#validates :tour, presence: true
has_many :location_location_relationships
def name_of_tour
name
end
end
location_location_relationships控制器：
class LocationLocationRelationshipsController < ApplicationController
before_action :set_location_location_relationship, only: [:show, :edit, :update, :destroy]
# GET /location_location_relationships
# GET /location_location_relationships.json
def index
@location_location_relationships = LocationLocationRelationship.all
end
# GET /location_location_relationships/1
# GET /location_location_relationships/1.json
def show
end
# GET /location_location_relationships/new
def new
@location_location_relationship = LocationLocationRelationship.new
end
# GET /location_location_relationships/1/edit
def edit
end
# POST /location_location_relationships
# POST /location_location_relationships.json
def create
@location_location_relationship = LocationLocationRelationship.new(location_location_relationship_params)
respond_to do |format|
if @location_location_relationship.save
format.html { redirect_to @location_location_relationship, notice: 'Die Distanz wurde angelegt.' }
format.json { render :show, status: :created, location: @location_location_relationship }
else
format.html { render :new }
format.json { render json: @location_location_relationship.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /location_location_relationships/1
# PATCH/PUT /location_location_relationships/1.json
def update
respond_to do |format|
if @location_location_relationship.update(location_location_relationship_params)
format.html { redirect_to @location_location_relationship, notice: 'Die Distanz wurde aktualisiert.' }
format.json { render :show, status: :ok, location: @location_location_relationship }
else
format.html { render :edit }
format.json { render json: @location_location_relationship.errors, status: :unprocessable_entity }
end
end
end
# DELETE /location_location_relationships/1
# DELETE /location_location_relationships/1.json
def destroy
@location_location_relationship.destroy
respond_to do |format|
format.html { redirect_to location_location_relationships_url, notice: 'Die Distanz wurde gelöscht.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_location_location_relationship
@location_location_relationship = LocationLocationRelationship.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def location_location_relationship_params
params.require(:location_location_relationship).permit(:predecessor_id, :successor_id, :tour, :distance, :sequence, :binary_variable)
end
end