求助：部分页面覆盖默认og:image后Facebook仍显示默认图

Let's work through this issue step by step—this is a common gotcha with Open Graph tags, so we'll narrow it down quickly:

• First, verify the page's actual HTML source
  Right-click on the Shopify partners page, select "View Page Source", then search for <meta property="og:image">. Make sure your custom image URL is present, and that it appears after the default og:image tag (if the default is being injected globally). If the default tag comes later, it'll overwrite your custom one. Also check for duplicate og:image tags—only the last valid one will be used by Facebook.

• Force Facebook to re-scrape the page
  Facebook's Debug tool caches metadata aggressively. Even if you fixed the tags, it might still show the old image. In the Debug tool, look for the "Scrape Again" button (usually near the top or under the "When and how we last scraped" section) and click it. This will fetch the latest HTML and update their cache.

• Validate your custom image meets Facebook's requirements
  Facebook has strict specs for og:image:

  • Minimum dimensions: 1200x630 pixels (recommended)
  • File size: Under 8MB
  • Must be accessible via HTTPS (no HTTP links)
  • Include og:image:width and og:image:height tags alongside your custom og:image—this helps Facebook render the image correctly without falling back to the default.

• Check for client-side rendering issues
  If your site uses a JavaScript framework (like React, Vue, etc.), make sure the og:image tag is rendered server-side or during initial page load. Facebook's crawler doesn't execute client-side JS, so if your custom tag is added after the page loads via JS, it won't be picked up. You'll need to ensure the tag is present in the raw HTML sent from the server.

• Verify no conflicting OG tags
  If you have og:image:secure_url set globally, make sure your custom page also updates this tag to match your new image. Facebook prioritizes the secure_url if it's present and the page is served over HTTPS.

I've run into this exact issue before with client sites—9 times out of 10 it's either a cache problem or the custom tag being overwritten by the global one. Start with the scrape again button first, that's the quick win!

内容的提问来源于stack exchange，提问作者Leo