Question

我希望有人可以帮助我。我有一个名为＆＃34; location_location_relationships＆＃34;的表。如果您创建一个新条目，您可以选择两个位置（前任和后继），这两个位置来自＆＃34; locaions＆＃34;表。此外，您可以选择一个旅游。这些来自桌子＆＃34;旅游＆＃34;。位置选择正在进行中。但是这些旅行会带来一些问题。首先，我在模型中没有任何东西可以工作，但选择的不是名字，而是＆＃34; location_location_relationships＆＃34;表。但我想要那里的名字。所以我完成了＆＃34;旅行＆＃34;的模型。和＆＃34; location_location_relationships＆＃34;。在选择中，现在有游览的名称，但如果我按下按钮＆＃34;创建＆＃34;我得到错误按摩：游览（＃96769428）预期，得到字符串（＃1848192）

它显示了location_location_relationship_controller.rb中的错误：＆＃39; def create

name

有谁知道我做错了什么？

非常感谢您的帮助！

这是我的location_location_relationships_form.html.erb，其中collection_select位于：

@location_location_relationship = LocationLocationRelationship.new(location_location_relationship_params)'

我的location_location_relationships模型：

<%= 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 %>

我的旅游模特：

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

location_location_relationships控制器：

class Tour < ActiveRecord::Base
#validates :tour, presence: true
has_many :location_location_relationships
def name_of_tour
    name
end
end

Answer 1

游览（＃96769428）预期，得到字符串（＃1848192）

您应该将tour更改为tour_id

<div class="field">
<%= f.label 'Tour' %><br>
<%= f.collection_select :tour_id, Tour.all, :id, :name_of_tour, prompt: true %>
</div>

还有location_location_relationship_params

def location_location_relationship_params
  params.require(:location_location_relationship).permit(:predecessor_id, :successor_id, :tour_id, :distance, :sequence, :binary_variable)
end

f.collection_select的名字

1 个答案: