Question

我有这种纤细的语法：

= form_for(@influencer.relationships.build(followed_id: @influencer.id)) do |f|
  div = f.hidden_field :followed_id
  = f.submit "Follow", class: "btn btn-large btn-primary"

这是我提出的问题，但它不起作用。

<%= form_for(@influencer.relationships.build(followed_id: @influencer.id)) do |f| %>
    <% f.hidden_field :followed_id %>
  <%= f.submit "Follow" %>
<% end %>

Answer 1

<%= form_for @influencer.relationships.build(followed_id: @influencer.id) do |f| %>
  <%= f.hidden_field :followed_id %>
  <%= f.submit "Follow" %>
<% end %>

相反，从控制器范围构建对象是不好的做法。 @influencer.relationships.build(followed_id: @influencer.id)应该在控制器内完成：

#app/models/influencer.rb
class Influencer < ActiveRecord::Base
   has_many :relationships, foreign_key: :follower_id
end

#app/controllers/relationships_controller.rb
class RelationshipsController < ApplicationController
   def new
      @influencer = Influencer.find params[:influencer_id]
      @relationship = @influencer.relationships.build #-> "followed_id" SHOULD be a foreign key in the model. If you have it in the model, you won't need to explicitly define it
   end
end

因此，你会得到：

<%= button_to "Follow", @relationship %>

有问题转换苗条到erb

1 个答案: