Question

我正在尝试使用collection_select将branch_id分配给访问（以用户预订分支访问的形式）但我收到的错误是“错误的参数数量（7为4 ... 6）”。

我一直在使用这里的文档：http://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsHelper.html#method-i-collection_select据我所知，我的代码与示例匹配。

这是我的collection_select：

<div class="field">
    <%= f.label :branch_id, "Please Pick Service Provider/Branch you would like to visit:" %><br>
    <%= f.collection_select(:visit, :branch_id, Branch.all, :id, :branch_name_select, {prompt: "Select the Branch/Service"}, {:required => true}) %>
</div>

branch.rb：

class Branch < ActiveRecord::Base

  belongs_to :user
  has_many :visits

 def branch_name_select
   "#{branch_name}, #{address_line_1}, #{address_line_2}, #{city}, #{postcode}"
 end

end

visit.rb：

class Visit < ActiveRecord::Base
    belongs_to :branch  
    belongs_to :user #:as => 'created_by' 
    validates_uniqueness_of :time_from, :scope => [:date_from, :location], :message=>"slot is already taken on selected date"

end

Answer 1

这一行

<%= f.collection_select(:visit, :branch_id, Branch.all, :id, :branch_name_select, {prompt: "Select the Branch/Service"}, {:required => true}) %>

应该是

<%= f.collection_select(:branch_id, Branch.all, :id, :branch_name_select, {prompt: "Select the Branch/Service"}, {:required => true}) %>

Rails collection_select，参数数量错误

1 个答案: