JSON 解析器错误 783：params 的意外标记
JSON Parser Error 783: unexpected token at for params
我正在编辑资源 - @article - 每当我提交它时，我都会收到以下错误：
JSON::ParserError in ArticlesController#update
783: unexpected token at '#<ImageUploader::UploadedFile:0x00007fb154adb508>'
它突出显示了这一行：
if @article.update(article_params)
我的 Article#Update 操作中的正常 Rails 样板代码是什么：
def update
respond_to do |format|
if @article.update(article_params)
format.html { redirect_to @article, notice: 'Article was successfully updated.' }
format.json { render :show, status: :ok, location: @article }
else
format.html { render :edit }
format.json { render json: @article.errors, status: :unprocessable_entity }
end
end
end
这是服务器日志的完整输出（包括参数）：
Started PATCH "/articles/welcome-to-ftja" for ::1 at 2020-05-04 02:11:43 -0500
Processing by ArticlesController#update as HTML
Parameters: {"authenticity_token"=>"0pO56DaVEiWLX3iE3HNHRKsAPOK2z4RmUaH3jal5rOZjk7zYeoaSru9xOE9GYzLckTbnrVrz4ihXrc1hWcXzXA==", "article"=>{"title"=>"Welcome to FTJA!!", "featured"=>"true", "image"=>"#<ImageUploader::UploadedFile:0x00007fb154adb508>", "body"=>"<h1>Yet another great article.</h1><div>Test <strong>bold</strong> <em>italic</em> <del>strikethrough<br><br></del><figure data-trix-attachment=\"{"content":"<figure class=\"attachment attachment--preview attachment--jpg\">\n <img src=\"http://localhost:3000/rails/active_storage/representations/eyJfcJ2YXJpYXRpb24ifX0=--5b3d481c22cafd1ff8db36c1b24e57d8788d2217/cowork-4.jpg\" />\n\n <figcaption class=\"attachment__caption\">\n Coworking.\n </figcaption>\n</figure>\n","contentType":"image/jpeg","filename":"cowork-4.jpg","filesize":82497,"height":768,"previewable":true,"sgid":"_ZXhwaXJlc19pbgY7AFRJIgxwdXJwb3NlBjsAVEkiD2F0dGFjaGFibGUGOwBUSSIPZXhwaXJlc19hdAY7AFQw--e56d2e422","url":"http://localhost:3000/rails/active_storage/blobs/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBEUT09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--6d89ec207ef10c8e48577a5e9a170a8d178a9338/cowork-4.jpg","width":752}\" data-trix-content-type=\"image/jpeg\" data-trix-attributes=\"{"caption":"Coworking.","presentation":"gallery"}\" class=\"attachment attachment--content attachment--jpg\"><figure class=\"attachment attachment--preview attachment--jpg\">\r\n <img src=\"http://localhost:3000/rails/active_storage/blobs/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBEUT09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--6d89ec207ef10c8e48577a5e9a170a8d178a9338/cowork-4.jpg\" width=\"752\" height=\"768\">\r\n\r\n <figcaption class=\"attachment__caption\">\r\n Coworking.\r\n </figcaption>\r\n</figure>\r\n<figcaption class=\"attachment__caption attachment__caption--edited\">Coworking.</figcaption></figure><br><br><br><figure data-trix-attachment=\"{"content":"<figure class=\"attachment attachment--preview attachment--jpg\">\n <img src=\"http://localhost:3000/rails/active_storage/representations/eyJfcmFpbHMiOnsibWVzc2F-5b3d481c22cafd1ff8db36c1b24e57d8788d2217/article-1.jpg\" />\n\n <figcaption class=\"attachment__caption\">\n Working, working, working.\n </figcaption>\n</figure>\n","contentType":"image/jpeg","filename":"article-1.jpg","filesize":83730,"height":800,"previewable":true,"sgid":"BAh7CEkiCGdpZAY6BkVU--d99eadb00dd5ae6bb4220f5781b2946c2171604f","url":"http://localhost:3000/rails/active_storage/blobs/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBEZz09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--5c31ee2db4a2660d4a674dfb54375fda30251d3d/article-1.jpg","width":1200}\" data-trix-content-type=\"image/jpeg\" data-trix-attributes=\"{"caption":"Working, working, working.","presentation":"gallery"}\" class=\"attachment attachment--content attachment--jpg\"><figure class=\"attachment attachment--preview attachment--jpg\">\r\n <img src=\"http://localhost:3000/rails/active_storage/representations/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBEZz09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9i6IkJBaDdCam9VY21WemFYcGxYM1J2WDJ4cGJXbDBXd2RwQWdBRWFRSUFBdz09IiwiZXhwIjpudWxsLCJwdXIiOiJ2YXJpYXRpb24ifX0=--5b3d481c22cafd1ff8db36c1b24e57d8788d2217/article-1.jpg\">\r\n\r\n <figcaption class=\"attachment__caption\">\r\n Working, working, working.\r\n </figcaption>\r\n</figure>\r\n<figcaption class=\"attachment__caption attachment__caption--edited\">Working, working, working.</figcaption></figure><br><br><br></div>", "user_id"=>"1", "category_list"=>["", "Business", "Real Estate"]}, "commit"=>"Update Article", "id"=>"welcome-to-ftja"}
Article Load (2.1ms) SELECT "articles".* FROM "articles" WHERE "articles"."slug" = LIMIT [["slug", "welcome-to-ftja"], ["LIMIT", 1]]
↳ app/controllers/articles_controller.rb:73:in `set_article'
(2.1ms) BEGIN
↳ app/controllers/articles_controller.rb:50:in `block in update'
ActionText::RichText Load (4.0ms) SELECT "action_text_rich_texts".* FROM "action_text_rich_texts" WHERE "action_text_rich_texts"."record_id" = AND "action_text_rich_texts"."record_type" = AND "action_text_rich_texts"."name" = LIMIT [["record_id", 1], ["record_type", "Article"], ["name", "body"], ["LIMIT", 1]]
↳ app/controllers/articles_controller.rb:50:in `block in update'
(1.3ms) ROLLBACK
↳ app/controllers/articles_controller.rb:50:in `block in update'
Completed 500 Internal Server Error in 27ms (ActiveRecord: 9.4ms | Allocations: 5092)
JSON::ParserError (783: unexpected token at '#<ImageUploader::UploadedFile:0x00007fb154adb508>'):
app/controllers/articles_controller.rb:50:in `block in update'
app/controllers/articles_controller.rb:49:in `update'
如果您注意到参数中的 category_list，我相信这可能是造成它的原因：
"category_list"=>["", "Business", "Real Estate"]},
根据我所做的一些谷歌搜索，可能是空字符串 "" 引发了一些 JSON 循环解析。
我发现的一个建议是将 Cookie Serializer 更改为 :hybrid，如下所示：
Rails.application.config.action_dispatch.cookies_serializer = :hybrid
我试过了并重新启动了服务器，但没有成功。
可能是什么原因造成的，我该如何解决？
编辑 1
在错误页面的控制台上，我也尝试了以下操作：
>> article_params[:category_list]
=> ["", "Business", "Real Estate"]
>> article_params[:category_list].to_json
=> "[\"\",\"Business\",\"Real Estate\"]"
>> @article.image
=> #<ImageUploader::UploadedFile storage=:store id="3b96dc3198098a9f57ff2b00a2cdb252.jpg" metadata={"filename"=>"article-3.jpg", "size"=>99083, "mime_type"=>"image/jpeg"}>
编辑 2
我正在使用 SimpleForm 来处理我的表单，这个特定表单的截断版本如下所示：
<%= simple_form_for article, html: {multipart: true} do |f| %>
<%= f.input_field :title, placeholder: "Title", class: "form-control" %>
<%= f.rich_text_area :body, class: 'form-control customized-min-height', placeholder: "Enter your article body here..." %>
<%= f.input :user_id, as: :hidden, input_html: { value: current_user.id } %>
<%= f.input_field :category_list, collection: ActsAsTaggableOn::Tag.all.pluck(:name), input_html: { value: article.category_list.join(","), class: "custom-control-input" }, as: :check_boxes %>
<%= f.button :submit, class:"btn btn-primary" %>
<% end %>
当我转到 Articles#Edit
时，上面的表格只生成 ""
这是我的 Articles#Edit 控制器操作：
# GET /articles/1/edit
def edit
end
我该如何解决这个问题？
编辑 3
好的，我最终通过添加 include_blank: false 和 include_hidden: false 得到了不 return 空字符串的表格，如下所示：
<%= f.input_field :category_list, collection: ActsAsTaggableOn::Tag.all.pluck(:name), input_html: { value: article.category_list.join(","), class: "custom-control-input" }, as: :check_boxes, include_blank: false, include_hidden: false %>
生成如下所示的参数：
>> article_params
=> <ActionController::Parameters {"title"=>"Welcome!!", "body"=>"<h1>Yet another great article.</h1><div>Test <strong>bold</strong> <em>italic</em> <del>strikethrough<br><br></del><figure data-trix-attachment=\"{"content":"<figure class=\"attachment attachment--preview attachment--jpg\">\n <img src=\"http://localhost:3000/rails/active_storage/representations/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBd2217/cowork-4.jpg\" />\n\n <figcaption class=\"attachment__caption\">\n Coworking.\n </figcaption>\n</figure>\n","contentType":"image/jpeg","filename":"cowork-4.jpg","filesize":82497,"height":768,"previewable":true,"sgid":"BAhaac","url":"http://localhost:3000/rails/active_storage/blobs/eya9338/cowork-4.jpg","width":752}\" data-trix-content-type=\"image/jpeg\" data-trix-attributes=\"{"caption":"Coworking.","presentation":"gallery"}\" class=\"attachment attachment--content attachment--jpg\"><figure class=\"attachment attachment--preview attachment--jpg\">\r\n <img src=\"http://localhost:3000/rails/active_storage/representations/e88d2217/cowork-4.jpg\">\r\n\r\n <figcaption class=\"attachment__caption\">\r\n Coworking.\r\n </figcaption>\r\n</figure>\r\n<figcaption class=\"attachment__caption attachment__caption--edited\">Coworking.</figcaption></figure><br><br><br><figure data-trix-attachment=\"{"content":"<figure class=\"attachment attachment--preview attachment--jpg\">\n <img src=\"http://localhost:3000/rails/active_storage/representations/eyJ8d2217/article-1.jpg\" />\n\n <figcaption class=\"attachment__caption\">\n Working, working, working.\n </figcaption>\n</figure>\n","contentType":"image/jpeg","filename":"article-1.jpg","filesize":83730,"height":800,"previewable":true,"sgid":"B1604f","url":"http://localhost:3000/rails/active_storage/blobs/eyd3d/article-1.jpg","width":1200}\" data-trix-content-type=\"image/jpeg\" data-trix-attributes=\"{"caption":"Working, working, working.","presentation":"gallery"}\" class=\"attachment attachment--content attachment--jpg\"><figure class=\"attachment attachment--preview attachment--jpg\">\r\n <img src=\"http://localhost:3000/rails/active_storage/blobs/eyd3d/article-1.jpg\" width=\"1200\" height=\"800\">\r\n\r\n <figcaption class=\"attachment__caption\">\r\n Working, working, working.\r\n </figcaption>\r\n</figure>\r\n<figcaption class=\"attachment__caption attachment__caption--edited\">Working, working, working.</figcaption></figure><br><br><br></div>", "featured"=>"true", "user_id"=>"1", "image"=>"#<ImageUploader::UploadedFile:0x00007fd18d61b1e0>", "category_list"=>["Business", "Real Estate", "Investing"]} permitted: true>
但我仍然遇到同样的错误。所以似乎还有另一个罪魁祸首。
查看错误信息
783: unexpected token at '#<ImageUploader::UploadedFile:0x00007fb154adb508>'
它似乎永远不会到达空字符串（即使那样也可能会给您带来错误）。解析 ImageUploader 参数时遇到问题。
从其他人那里读到这个错误似乎这可能与插件有关？并且此数据的解析和转换失败。
据我了解，您在基于 simple_form 的表单的富文本字段中添加了大约一张图片。当它试图将图像转换为 json 时失败了。
所以我建议您看看 gem 您是否有关于图片上传的信息？我无法在 Simple_form github 上找到任何类似的问题，所以我认为上传者部分不在 simple_form 本身。但是通过问题从 Simple_form 开发人员那里获得帮助可能是解决这个问题的好方法。
经过大量研究和无数次试错之后，我偶然发现了修复方法。
基本上，似乎正在发生的事情是，只要表单当前有图像并且正在编辑，如果现有图像处理不当，它就会将 cached_image 数据转换为字符串。可以看到一个better explanation here.
罪魁祸首原来是我表格中的这一行：
<%= f.input :image, as: :hidden, value: f.object.cached_image_data %>
一旦我将其更改为以下内容，它就像一个魅力：
<%= f.input :image, as: :hidden, input_html: { value: f.object.cached_image_data } %>
我正在编辑资源 - @article - 每当我提交它时，我都会收到以下错误：
JSON::ParserError in ArticlesController#update
783: unexpected token at '#<ImageUploader::UploadedFile:0x00007fb154adb508>'
它突出显示了这一行：
if @article.update(article_params)
我的 Article#Update 操作中的正常 Rails 样板代码是什么：
def update
respond_to do |format|
if @article.update(article_params)
format.html { redirect_to @article, notice: 'Article was successfully updated.' }
format.json { render :show, status: :ok, location: @article }
else
format.html { render :edit }
format.json { render json: @article.errors, status: :unprocessable_entity }
end
end
end
这是服务器日志的完整输出（包括参数）：
Started PATCH "/articles/welcome-to-ftja" for ::1 at 2020-05-04 02:11:43 -0500
Processing by ArticlesController#update as HTML
Parameters: {"authenticity_token"=>"0pO56DaVEiWLX3iE3HNHRKsAPOK2z4RmUaH3jal5rOZjk7zYeoaSru9xOE9GYzLckTbnrVrz4ihXrc1hWcXzXA==", "article"=>{"title"=>"Welcome to FTJA!!", "featured"=>"true", "image"=>"#<ImageUploader::UploadedFile:0x00007fb154adb508>", "body"=>"<h1>Yet another great article.</h1><div>Test <strong>bold</strong> <em>italic</em> <del>strikethrough<br><br></del><figure data-trix-attachment=\"{"content":"<figure class=\"attachment attachment--preview attachment--jpg\">\n <img src=\"http://localhost:3000/rails/active_storage/representations/eyJfcJ2YXJpYXRpb24ifX0=--5b3d481c22cafd1ff8db36c1b24e57d8788d2217/cowork-4.jpg\" />\n\n <figcaption class=\"attachment__caption\">\n Coworking.\n </figcaption>\n</figure>\n","contentType":"image/jpeg","filename":"cowork-4.jpg","filesize":82497,"height":768,"previewable":true,"sgid":"_ZXhwaXJlc19pbgY7AFRJIgxwdXJwb3NlBjsAVEkiD2F0dGFjaGFibGUGOwBUSSIPZXhwaXJlc19hdAY7AFQw--e56d2e422","url":"http://localhost:3000/rails/active_storage/blobs/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBEUT09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--6d89ec207ef10c8e48577a5e9a170a8d178a9338/cowork-4.jpg","width":752}\" data-trix-content-type=\"image/jpeg\" data-trix-attributes=\"{"caption":"Coworking.","presentation":"gallery"}\" class=\"attachment attachment--content attachment--jpg\"><figure class=\"attachment attachment--preview attachment--jpg\">\r\n <img src=\"http://localhost:3000/rails/active_storage/blobs/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBEUT09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--6d89ec207ef10c8e48577a5e9a170a8d178a9338/cowork-4.jpg\" width=\"752\" height=\"768\">\r\n\r\n <figcaption class=\"attachment__caption\">\r\n Coworking.\r\n </figcaption>\r\n</figure>\r\n<figcaption class=\"attachment__caption attachment__caption--edited\">Coworking.</figcaption></figure><br><br><br><figure data-trix-attachment=\"{"content":"<figure class=\"attachment attachment--preview attachment--jpg\">\n <img src=\"http://localhost:3000/rails/active_storage/representations/eyJfcmFpbHMiOnsibWVzc2F-5b3d481c22cafd1ff8db36c1b24e57d8788d2217/article-1.jpg\" />\n\n <figcaption class=\"attachment__caption\">\n Working, working, working.\n </figcaption>\n</figure>\n","contentType":"image/jpeg","filename":"article-1.jpg","filesize":83730,"height":800,"previewable":true,"sgid":"BAh7CEkiCGdpZAY6BkVU--d99eadb00dd5ae6bb4220f5781b2946c2171604f","url":"http://localhost:3000/rails/active_storage/blobs/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBEZz09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--5c31ee2db4a2660d4a674dfb54375fda30251d3d/article-1.jpg","width":1200}\" data-trix-content-type=\"image/jpeg\" data-trix-attributes=\"{"caption":"Working, working, working.","presentation":"gallery"}\" class=\"attachment attachment--content attachment--jpg\"><figure class=\"attachment attachment--preview attachment--jpg\">\r\n <img src=\"http://localhost:3000/rails/active_storage/representations/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBEZz09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9i6IkJBaDdCam9VY21WemFYcGxYM1J2WDJ4cGJXbDBXd2RwQWdBRWFRSUFBdz09IiwiZXhwIjpudWxsLCJwdXIiOiJ2YXJpYXRpb24ifX0=--5b3d481c22cafd1ff8db36c1b24e57d8788d2217/article-1.jpg\">\r\n\r\n <figcaption class=\"attachment__caption\">\r\n Working, working, working.\r\n </figcaption>\r\n</figure>\r\n<figcaption class=\"attachment__caption attachment__caption--edited\">Working, working, working.</figcaption></figure><br><br><br></div>", "user_id"=>"1", "category_list"=>["", "Business", "Real Estate"]}, "commit"=>"Update Article", "id"=>"welcome-to-ftja"}
Article Load (2.1ms) SELECT "articles".* FROM "articles" WHERE "articles"."slug" = LIMIT [["slug", "welcome-to-ftja"], ["LIMIT", 1]]
↳ app/controllers/articles_controller.rb:73:in `set_article'
(2.1ms) BEGIN
↳ app/controllers/articles_controller.rb:50:in `block in update'
ActionText::RichText Load (4.0ms) SELECT "action_text_rich_texts".* FROM "action_text_rich_texts" WHERE "action_text_rich_texts"."record_id" = AND "action_text_rich_texts"."record_type" = AND "action_text_rich_texts"."name" = LIMIT [["record_id", 1], ["record_type", "Article"], ["name", "body"], ["LIMIT", 1]]
↳ app/controllers/articles_controller.rb:50:in `block in update'
(1.3ms) ROLLBACK
↳ app/controllers/articles_controller.rb:50:in `block in update'
Completed 500 Internal Server Error in 27ms (ActiveRecord: 9.4ms | Allocations: 5092)
JSON::ParserError (783: unexpected token at '#<ImageUploader::UploadedFile:0x00007fb154adb508>'):
app/controllers/articles_controller.rb:50:in `block in update'
app/controllers/articles_controller.rb:49:in `update'
如果您注意到参数中的 category_list，我相信这可能是造成它的原因：
"category_list"=>["", "Business", "Real Estate"]},
根据我所做的一些谷歌搜索，可能是空字符串 "" 引发了一些 JSON 循环解析。
我发现的一个建议是将 Cookie Serializer 更改为 :hybrid，如下所示：
Rails.application.config.action_dispatch.cookies_serializer = :hybrid
我试过了并重新启动了服务器，但没有成功。
可能是什么原因造成的，我该如何解决？
编辑 1
在错误页面的控制台上，我也尝试了以下操作：
>> article_params[:category_list]
=> ["", "Business", "Real Estate"]
>> article_params[:category_list].to_json
=> "[\"\",\"Business\",\"Real Estate\"]"
>> @article.image
=> #<ImageUploader::UploadedFile storage=:store id="3b96dc3198098a9f57ff2b00a2cdb252.jpg" metadata={"filename"=>"article-3.jpg", "size"=>99083, "mime_type"=>"image/jpeg"}>
编辑 2
我正在使用 SimpleForm 来处理我的表单，这个特定表单的截断版本如下所示：
<%= simple_form_for article, html: {multipart: true} do |f| %>
<%= f.input_field :title, placeholder: "Title", class: "form-control" %>
<%= f.rich_text_area :body, class: 'form-control customized-min-height', placeholder: "Enter your article body here..." %>
<%= f.input :user_id, as: :hidden, input_html: { value: current_user.id } %>
<%= f.input_field :category_list, collection: ActsAsTaggableOn::Tag.all.pluck(:name), input_html: { value: article.category_list.join(","), class: "custom-control-input" }, as: :check_boxes %>
<%= f.button :submit, class:"btn btn-primary" %>
<% end %>
当我转到 Articles#Edit
""
这是我的 Articles#Edit 控制器操作：
# GET /articles/1/edit
def edit
end
我该如何解决这个问题？
编辑 3
好的，我最终通过添加 include_blank: false 和 include_hidden: false 得到了不 return 空字符串的表格，如下所示：
<%= f.input_field :category_list, collection: ActsAsTaggableOn::Tag.all.pluck(:name), input_html: { value: article.category_list.join(","), class: "custom-control-input" }, as: :check_boxes, include_blank: false, include_hidden: false %>
生成如下所示的参数：
>> article_params
=> <ActionController::Parameters {"title"=>"Welcome!!", "body"=>"<h1>Yet another great article.</h1><div>Test <strong>bold</strong> <em>italic</em> <del>strikethrough<br><br></del><figure data-trix-attachment=\"{"content":"<figure class=\"attachment attachment--preview attachment--jpg\">\n <img src=\"http://localhost:3000/rails/active_storage/representations/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBd2217/cowork-4.jpg\" />\n\n <figcaption class=\"attachment__caption\">\n Coworking.\n </figcaption>\n</figure>\n","contentType":"image/jpeg","filename":"cowork-4.jpg","filesize":82497,"height":768,"previewable":true,"sgid":"BAhaac","url":"http://localhost:3000/rails/active_storage/blobs/eya9338/cowork-4.jpg","width":752}\" data-trix-content-type=\"image/jpeg\" data-trix-attributes=\"{"caption":"Coworking.","presentation":"gallery"}\" class=\"attachment attachment--content attachment--jpg\"><figure class=\"attachment attachment--preview attachment--jpg\">\r\n <img src=\"http://localhost:3000/rails/active_storage/representations/e88d2217/cowork-4.jpg\">\r\n\r\n <figcaption class=\"attachment__caption\">\r\n Coworking.\r\n </figcaption>\r\n</figure>\r\n<figcaption class=\"attachment__caption attachment__caption--edited\">Coworking.</figcaption></figure><br><br><br><figure data-trix-attachment=\"{"content":"<figure class=\"attachment attachment--preview attachment--jpg\">\n <img src=\"http://localhost:3000/rails/active_storage/representations/eyJ8d2217/article-1.jpg\" />\n\n <figcaption class=\"attachment__caption\">\n Working, working, working.\n </figcaption>\n</figure>\n","contentType":"image/jpeg","filename":"article-1.jpg","filesize":83730,"height":800,"previewable":true,"sgid":"B1604f","url":"http://localhost:3000/rails/active_storage/blobs/eyd3d/article-1.jpg","width":1200}\" data-trix-content-type=\"image/jpeg\" data-trix-attributes=\"{"caption":"Working, working, working.","presentation":"gallery"}\" class=\"attachment attachment--content attachment--jpg\"><figure class=\"attachment attachment--preview attachment--jpg\">\r\n <img src=\"http://localhost:3000/rails/active_storage/blobs/eyd3d/article-1.jpg\" width=\"1200\" height=\"800\">\r\n\r\n <figcaption class=\"attachment__caption\">\r\n Working, working, working.\r\n </figcaption>\r\n</figure>\r\n<figcaption class=\"attachment__caption attachment__caption--edited\">Working, working, working.</figcaption></figure><br><br><br></div>", "featured"=>"true", "user_id"=>"1", "image"=>"#<ImageUploader::UploadedFile:0x00007fd18d61b1e0>", "category_list"=>["Business", "Real Estate", "Investing"]} permitted: true>
但我仍然遇到同样的错误。所以似乎还有另一个罪魁祸首。
查看错误信息
783: unexpected token at '#<ImageUploader::UploadedFile:0x00007fb154adb508>'
它似乎永远不会到达空字符串（即使那样也可能会给您带来错误）。解析 ImageUploader 参数时遇到问题。
从其他人那里读到这个错误似乎这可能与插件有关？并且此数据的解析和转换失败。
据我了解，您在基于 simple_form 的表单的富文本字段中添加了大约一张图片。当它试图将图像转换为 json 时失败了。
所以我建议您看看 gem 您是否有关于图片上传的信息？我无法在 Simple_form github 上找到任何类似的问题，所以我认为上传者部分不在 simple_form 本身。但是通过问题从 Simple_form 开发人员那里获得帮助可能是解决这个问题的好方法。
经过大量研究和无数次试错之后，我偶然发现了修复方法。
基本上，似乎正在发生的事情是，只要表单当前有图像并且正在编辑，如果现有图像处理不当，它就会将 cached_image 数据转换为字符串。可以看到一个better explanation here.
罪魁祸首原来是我表格中的这一行：
<%= f.input :image, as: :hidden, value: f.object.cached_image_data %>
一旦我将其更改为以下内容，它就像一个魅力：
<%= f.input :image, as: :hidden, input_html: { value: f.object.cached_image_data } %>