Bug: 500 when trying to edit image

[rpiech]

I've stumbled upon an issue when trying to add alternativeText to image, when you try to save it, it will throw 500 error. Uploading works just fine, there's only a problem when you click 'Finish' button in edit of an image. I've already tried your workaround from #2 but it wouldn't work in this case.

@strapi/strapi: "4.2.0" strapi-plugin-placeholder: "^4.1.7"

How to replicate:

1. Upload an image in media library
2. Click edit button
3. Try to save
4. It should throw 500 error

[Evilazio]

I created a pacth for this error.

first install this npm i patch-package --save-dev

create a folder named patches in the root and put a file named strapi-plugin-placeholder+4.1.7.patch there with this content:

diff --git a/node_modules/strapi-plugin-placeholder/server/utils.js b/node_modules/strapi-plugin-placeholder/server/utils.js
index afee787..59d836f 100644
--- a/node_modules/strapi-plugin-placeholder/server/utils.js
+++ b/node_modules/strapi-plugin-placeholder/server/utils.js
@@ -8,7 +8,7 @@ const pluginId = require('./plugin-id');
  * @returns {boolean} whether a placeholder can be generated for the given MIME type
  */

-const isValidMimeType = (mimeType) => mimeType.startsWith('image/');
+const isValidMimeType = (mimeType) => mimeType && mimeType.startsWith('image/');

 /**
  * Helper that retrieves one of the available services of this plugin from Strapi.

after this rerun npm i

[WalkingPizza]

@Evilazio can you confirm the placeholder is updated properly when you update a media library entry by replacing the image in it?

[arixwap]

I also face the same issue here

[Evilazio]

@Evilazio can you confirm the placeholder is updated properly when you update a media library entry by replacing the image in it?

Yes, the placeholder is updated correctly when replace the image.

[WalkingPizza]

Should be fixed in the new 4.3.6 version!