Rails 6 ActionText错误“”：String的未定义方法'body'答案

【问题标题】：Rails 6 ActionText Error undefined method `body' for "":StringRails 6 ActionText错误“”：String的未定义方法'body'
【发布时间】：2021-04-14 18:35:51
【问题描述】：

当我尝试在 Rails 6 上的浏览器上查看帖子表单时出现以下错误。我有一个 admin/posts_controller.rb。这些帖子有一个标题和一个正文，我想在正文上使用 trix 编辑器添加 actiontext

NoMethodError at /admin/posts/new
undefined method `body' for "":String

Hint: `body` is being called on a `String` object, which might not be the type of object you were expecting.

app/models/post.rb

has_rich_text :body
extend FriendlyId
friendly_id :title, use: :slugged
mount_uploader :banner, BannerUploader

admin/posts/_form.html.erb

<div class="form-group">
   <%= form.label :body %>
   <%= form.rich_text_area :body, id: :post_body, class: 'form-control' %>
</div>

我正在使用布局 admin.html.erb 而不是 application.html.erb 进行渲染

这是我的相关文件

app/packs/admin.js

require("trix")
require("@rails/actiontext")
import Rails from "@rails/ujs"
import Turbolinks from "turbolinks"
import * as ActiveStorage from "@rails/activestorage"
import "channels"
// import the bootstrap javascript module
import "jquery"
import "bootstrap"
import "feather"
import "perfect-scrollbar"
require('./dash/dash')
import "js-cookie"
require("@nathanvda/cocoon")
// Load Datatables
import dt from "datatables.net";
document.addEventListener("turbolinks:load", () => {
    dt(window, $);
});
const dataTables = [];
document.addEventListener("turbolinks:load", () => {
  if (dataTables.length === 0 && $('.data-table').length !== 0) {
    $('.data-table').each((_, element) => {
      dataTables.push($(element).DataTable({
        pageLength: 50
      }));
    });
  }
});
document.addEventListener("turbolinks:before-cache", () => {
  while (dataTables.length !== 0) {
    dataTables.pop().destroy();
  }
});
// Import admin.css files
import '../stylesheets/admin'
require.context('../images/dash', true)
Rails.start()
Turbolinks.start()
ActiveStorage.start()

app/javascripts/stylesheets/admin.scss

@import "actiontext.scss";
@import "dashforge/fontawesome-all.scss";
@import "dashforge/ionicons.scss";
@import "dashforge/dashforge.scss"

app/javascripts/actiontext.scss

//
// Provides a drop-in pointer for the default Trix stylesheet that will format the toolbar and
// the trix-editor content (whether displayed or under editing). Feel free to incorporate this
// inclusion directly in any other asset bundle and remove this file.
//
//= require trix/dist/trix
// We need to override trix.css's image gallery styles to accommodate the
// <action-text-attachment> element we wrap around attachments. Otherwise,
// images in galleries will be squished by the max-width: 33%; rule.
.trix-content {
  .attachment-gallery {
    > action-text-attachment,
    > .attachment {
      flex: 1 0 33%;
      padding: 0 0.5em;
      max-width: 33%;
    }
    &.attachment-gallery--2,
    &.attachment-gallery--4 {
      > action-text-attachment,
      > .attachment {
        flex-basis: 50%;
        max-width: 50%;
      }
    }
  }
  action-text-attachment {
    .attachment {
      padding: 0 !important;
      max-width: 100% !important;
    }
  }
}

config/application.rb

require "action_text/engine"

我真的到了我的极限。我不知道我可能会错过什么。如果我需要提供任何进一步的详细信息，请告诉我

【问题讨论】：

标签： ruby-on-rails ruby actiontext

【解决方案1】：

对于遇到此问题的任何人。我已经意识到这个问题的原因

使用 ActionText 时，您不应在表格中添加相应的列。

即如果您想在 body 上添加操作文本，则您的 posts table 上不应有 body 列。

只需在您的模型中调用 has_rich_text :body 并确保您的 posts 表中没有 body 列

所以在这种情况下，解决方案是通过以下迁移删除我的正文列，就是这样

Remove Body Column from Posts Migration

remove_column :posts, :body

【讨论】：