如何解决添加带有回形针的图像失败 NoHandlerError
在 rails 6 中使用 Paperclip 6.1.0 时出现此错误:
Paperclip::AdapterRegistry::NoHandlerError (没有找到“logo.jpg”的处理程序):
在我的模型中,我有:
class Movie < ApplicationRecord
has_many :screens
has_many :tickets
has_attached_file :blob,styles: {
thumb: '100x100>',square: '200x200#',medium: '300x300>'
}
# Validate the attached image is image/jpg,image/png,etc
validates_attachment_content_type :blob,:content_type => /\aimage\/.*\Z/
end
异常发生在:
def create
@movie = Movie.new(movie_params)
if @movie.save
redirect_to @movie,notice: 'Movie was successfully created.'
else
带参数:
Parameters:
{"authenticity_token"=>"fzm4JrC/eGQsDUS04w52lfI7B5hC6agpSRtyn+4BSayWxRt1RG/lZDNypxxWVmcSZfaW6+HQ+auNJm7p43p/LQ==","movie"=>{"title"=>"test","description"=>"345","movie_length"=>"4r","age_limit"=>"345","price"=>"345","category"=>"345","blob"=>"Screen Shot 2020-12-30 at 10.24.49.png"},"commit"=>"Create Movie"}
_form.html.erb:
<%= form_for @movie do |f|%>
<%= form_for @movie,html: { multipart: true } do |f|%>
<div class="form-group">
<% if @movie.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@movie.errors.count,"error") %> prohibited this movie from being saved:</h2>
<ul>
<% @movie.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<%# <div class="field"> %>
<%= f.label :title %><br>
<%= f.text_field :title,class: "form-control",placeholder: "Title" %>
</div>
<div class="field">
<%= f.label :blob %><br>
<%= f.text_field :blob,placeholder: "blob" %>
</div>
<div class="actions">
<%= f.submit %>
<%# f.submit will automatically give it a create or update button %>
</div>
<% end %>
<% end %>
有人知道这是怎么回事吗?
解决方法
您有两个对 form_for
嵌套的调用。这将创建 <form ...><form...>
,它不是有效的 HTML。 Form elements may not be nested inside of each other 并且行为是高度不可预测的。通常提交按钮会提交外部表单元素,但由于这是非标准的,任何事情都可能发生。
移除对 <%= form_for(@movie) do |f| %>
的外部调用并使用文件字段输入而不是文本输入:
<%= form_for @movie,html: { multipart: true } do |f|%>
<div class="form-group">
<% if @movie.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@movie.errors.count,"error") %> prohibited this movie from being saved:</h2>
<ul>
<% @movie.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :title %><br>
<%= f.text_field :title,class: "form-control",placeholder: "Title" %>
</div>
<div class="field">
<%= f.label :blob %><br>
<%= f.file_field :blob,placeholder: "blob" %>
</div>
<div class="actions">
<%= f.submit %>
</div>
</div>
<% end %>
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