使用 LightDarkImg 抛出错误

[NateDhaliwal]

在使用 <LightDarkImg /> 时，我遇到了一个令人费解的错误，该错误并未提供问题的实际线索。

错误：

index.js:1755
Uncaught (in promise) TypeError: eC(...) is not a function
    at index.js:1755:48
    at index.js:64:37
    at X (index.js:416:5)
    at k (index.js:62:16)
    at index.js:1759:46
    at index.js:64:37
    at X (index.js:416:5)
    at k (index.js:62:16)
    at m.get (index.js:84:60)
    at Array Iterator.next (<anonymous>)
    at A.getValue (index.js:244:86)
    at index.js:222:52
    at index.js:64:37
    at X (index.js:416:5)
    at k (index.js:62:16)
    at index.js:1841:47
    at index.js:64:37
    at X (index.js:416:5)
    at k (index.js:62:16)
    at Object.evaluate (index.js:807:13)
    at Object.evaluate (index.js:103:106)
    at tr.evaluateSyscall (index.js:2873:20)
    at tr.evaluateInner (index.js:2852:64)
    at tr.evaluateOuter (index.js:2849:10)
    at tH.next (index.js:4167:45)
    at tH._execute (index.js:4157:21)
    at tH.execute (index.js:4133:41)
    at tj.handleException (index.js:3450:19)
    at tR.handleException (index.js:3592:52)
    at tF.throw (index.js:3414:16)
    at G.evaluate (index.js:565:42)
    at tF._execute (index.js:3401:34)
    at tF.execute (index.js:3393:17)
    at tU.rerender (index.js:3610:8)
    at tq.render (index-BCp6wOJU.js:4639:55)
    at index-BCp6wOJU.js:4934:16
    at eX (index.js:2414:7)
    at tG._renderRoots (index-BCp6wOJU.js:4914:7)
    at tG._renderRootsTransaction (index-BCp6wOJU.js:4962:12)
    at tG._revalidate (index-BCp6wOJU.js:4995:10)
    at invoke (index.js:262:14)
    at m.flush (index.js:180:11)
    at g.flush (index.js:334:19)
    at q._end (index.js:762:32)
    at q.end (index.js:565:10)
    at q._run (index.js:806:14)
    at q._join (index.js:783:19)
    at q.join (index.js:605:17)
    at Array.<anonymous> (index-BCp6wOJU.js:4728:26)
    at q._trigger (index.js:860:21)
    at q._end (index.js:775:16)
    at _boundAutorunEnd (index.js:499:12)

我的代码：

{{#if (and this.logoImg this.darkLogoImg)}}
  <div class="category-logo aspect-image">
    <LightDarkImg
      @lightImg={{this.logoImg}}
      @darkImg={{this.darkLogoImg}}
    />
  </div>
{{/if}}

方法如下：

  get logoImg() {
    if (settings.show_category_logo && this.args.category.uploaded_logo) {
      console.log(this.args.category.uploaded_logo.url);
      return this.args.category.uploaded_logo;
    } else if (
      settings.show_category_logo &&
      settings.show_parent_category_logo &&
      this.args.category.parentCategory &&
      this.args.category.parentCategory.uploaded_logo
    ) {
      return this.args.category.parentCategory.uploaded_logo;
    } else if (settings.show_site_logo && this.siteSettings.logo_small) {
      return this.siteSettings.logo_small;
    } else {
      return false;
    }
  }

  get darkLogoImg() {
    if (settings.show_dark_mode_category_logo && this.args.category.uploaded_logo_dark.url) {
      console.log(this.args.category.uploaded_logo_dark.url);
      return this.args.category.uploaded_logo_dark;
    } else if (
      settings.show_dark_mode_category_logo &&
      settings.show_parent_category_dark_mode_logo &&
      this.args.category.parentCategory &&
      this.args.category.parentCategory.uploaded_logo_dark
    ) {
      return this.args.category.parentCategory.uploaded_logo_dark;
    } else if (settings.show_site_logo && this.siteSettings.logo_small) {
      return this.siteSettings.logo_small;
    } else {
      return this.args.category.uploaded_logo; // If no dark mode logo is uploaded, use the normal logo
    }
  }

我在上述 LightDarkImg 组件（已复制到我的文件系统中）中记录了所有内容，图片 URL 打印正确。它们在 <img> 标签中也能正确显示。

有什么想法吗？谢谢。

[david (David Taylor)]

您能分享包含导入的完整文件吗？

我建议逐步减少代码，直到它能正常工作。例如，错误是来自 {{#if？ (and？还是其中一个 getter？

[NateDhaliwal]

没问题，这是完整的文件：

import Component from "@glimmer/component";
import { tracked } from "@glimmer/tracking";
import { service } from "@ember/service";
import { htmlSafe } from "@ember/template";

import LightDarkImg from "discourse/components/light-dark-img";
import { ajax } from "discourse/lib/ajax";
import icon from "discourse/helpers/d-icon";

import { and, not } from "truth-helpers";

export default class CategoryHeader extends Component {
  @service siteSettings;
  @service site;

  @tracked full_category_description;

  constructor() {
    super(...arguments);
    this.getFullCatDesc();
  }

  get ifParentCategory() {
    if (this.args.category.parentCategory) {
      return true;
    }
  }

  get showCatDesc() {
    if (settings.show_category_description) {
      return true;
    }
  }

  get catDesc() {
    return this.args.category.description;
  }

  async getFullCatDesc() {
    try {
      let cd = await ajax(`${this.args.category.topic_url}.json`);
      this.full_category_description = cd.post_stream.posts[0].cooked;
    } catch {}
  }

  get showFullCatDesc() {
    if (settings.show_full_category_description) {
      return true;
    }
  }

  get logoImg() {
    if (settings.show_category_logo && this.args.category.uploaded_logo) {
      console.log(this.args.category.uploaded_logo.url);
      return this.args.category.uploaded_logo;
    } else if (
      settings.show_category_logo &&
      settings.show_parent_category_logo &&
      this.args.category.parentCategory &&
      this.args.category.parentCategory.uploaded_logo
    ) {
      return this.args.category.parentCategory.uploaded_logo;
    } else if (settings.show_site_logo && this.siteSettings.logo_small) {
      return this.siteSettings.logo_small;
    } else {
      return false;
    }
  }

  get darkLogoImg() {
    if (settings.show_dark_mode_category_logo && this.args.category.uploaded_logo_dark.url) {
      console.log(this.args.category.uploaded_logo_dark.url);
      return this.args.category.uploaded_logo_dark;
    } else if (
      settings.show_dark_mode_category_logo &&
      settings.show_parent_category_dark_mode_logo &&
      this.args.category.parentCategory &&
      this.args.category.parentCategory.uploaded_logo_dark
    ) {
      return this.args.category.parentCategory.uploaded_logo_dark;
    } else if (settings.show_site_logo && this.siteSettings.logo_small) {
      return this.siteSettings.logo_small;
    } else {
      return this.args.category.uploaded_logo; // If no dark mode logo is uploaded, use the normal logo
    }
  }

  get ifParentProtected() {
    if (
      this.args.category.parentCategory &&
      (
        this.args.category.parentCategory.permission === null ||
        this.args.category.parentCategory.read_restricted
      )
    ) {
      return true;
    }
  }

  get ifProtected() {
    if (
      this.args.category.permission === null ||
      this.args.category.read_restricted
    ) {
      return true;
    }
  }

  get lockIcon() {
    return settings.category_lock_icon || "lock";
  }

  get showHeader() {
    const isException =
      this.args.category &&
      settings.hide_category_exceptions
        .split("|")
        .includes(String(this.args.category.id));
    const hideMobile = !settings.show_mobile && this.site.mobileView;
    const subCat =
      !settings.show_subcategory_header && this.args.category.parentCategory;
    const noDesc =
      !settings.hide_if_no_category_description &&
      !this.args.category.description_text;
    const path = window.location.pathname;
    return (
      /^\\/c\\//.test(path) && !isException && !noDesc && !subCat && !hideMobile
    );
  }

  get getHeaderStyle() {
    let headerStyle = "";
    if (settings.header_style === "box") {
      headerStyle +=
        "border-left: 6px solid #" + this.args.category.color + ";";
    }
    if (settings.header_style === "banner") {
      headerStyle +=
        "background-color: #" +
        this.args.category.color +
        "; color: #" +
        this.args.category.text_color +
        ";";
    }
    if (settings.show_parent_category_background_image) {
      if (this.args.category.parentCategory) {
        if (
          settings.header_background_image !== "outside" &&
          this.args.category.parentCategory.uploaded_background
        ) {
          headerStyle +=
            "background-image: url(" +
            this.args.category.parentCategory.uploaded_background.url +
            ");";
        }
      } else if (this.args.category.uploaded_background) {
        if (settings.header_background_image !== "outside") {
          headerStyle +=
            "background-image: url(" +
            this.args.category.uploaded_background.url +
            ");";
        }
      }
    } else {
      if (this.args.category.uploaded_background) {
        if (settings.header_background_image !== "outside") {
          headerStyle +=
            "background-image: url(" +
            this.args.category.uploaded_background.url +
            ");";
        }
      }
    }
    return headerStyle + " display: block; margin-bottom: 1em;";
  }

  get aboutTopicUrl() {
    if (settings.show_read_more_link && this.args.category.topic_url) {
      return settings.read_more_link_text;
    }
  }

  get inlineReadMore() {
    return (settings.inline_read_more && (settings.show_category_description || settings.show_full_category_description) && settings.show_read_more_link);
  }

  <template>
    {{#if this.showHeader}}
      <div
        class="category-title-header category-banner-{{@category.slug}}"
        style={{this.getHeaderStyle}}
      >
        <div class="category-title-contents">
          {{#if (and this.logoImg this.darkLogoImg)}}
            <div class="category-logo aspect-image">
              <LightDarkImg
                @lightImg={{this.logoImg}}
                @darkImg={{this.darkLogoImg}}
              />
            </div>
          {{/if}}
          <div class="category-title-name" style={{if (not (this.logoImg)) "padding: 0 !important;"}}>
            {{#if this.ifParentCategory}}
              <a class="parent-box-link" href={{@category.parentCategory.url}}>
                {{#if this.ifParentProtected}}
                  {{icon this.lockIcon}}
                {{/if}}
                <h1>{{@category.parentCategory.name}}: </h1>
              </a>
            {{/if}}
            {{#if this.ifProtected}}
              {{icon this.lockIcon}}
            {{/if}}
            <h1>{{@category.name}}</h1>
          </div>

          <div class="category-title-description">
            {{#if this.showCatDesc}}
              <div class="cooked">
                {{htmlSafe this.catDesc}}
                {{#if this.inlineReadMore}}
                  <span class="category-about-url">
                    <a href={{@category.topic_url}}>{{this.aboutTopicUrl}}</a>
                  </span>
                {{/if}}
              </div>
            {{/if}}

            {{#if this.showFullCatDesc}}
              <div class="cooked">
                {{htmlSafe this.full_category_description}}
                {{#if this.inlineReadMore}}
                  <span class="category-about-url">
                    <a href={{@category.topic_url}}>{{this.aboutTopicUrl}}</a>
                  </span>
                {{/if}}
              </div>
            {{/if}}
          </div>
        </div>

        {{#unless this.inlineReadMore}}
          <div class="category-about-url">
            <a href={{@category.topic_url}}>{{this.aboutTopicUrl}}</a>
          </div>
        {{/unless}}
      </div>
    {{/if}}
  </template>
}

我将尝试进行您建议的调试，也许这能带来一些结果。

[david (David Taylor)]

@NateDhaliwal

`

<div class="category-title-name" style={{if (not (this.logoImg))`

这部分看起来很可疑。在 Ember 模板中用括号包裹某项会将其视为一个辅助函数（即一个函数）。所以我认为您想在那里去掉一层括号：

- <div class="category-title-name" style={{if (not (this.logoImg))
+ <div class="category-title-name" style={{if (not this.logoImg)

顺便说一句，您是在生产实例上进行开发吗？如果改用开发实例，您应该会收到更好的错误消息。

[NateDhaliwal]

谢谢你的提示。它在另一个分支上正常工作:eyes:，但我还是会那样做。使用生产环境，我将切换到开发环境看看是否有帮助。

[NateDhaliwal]

嗯，做出那个更改后不再有错误了。也许就是那个原因。谢谢你的帮助；<LightDarkImg /> 现在运行得很棒！