How to upload an image via REST for a dynamic-zone component

Questions and Answers
1

In the process of migrating to strapi v4 we try to get our various media upload controllers to work.

We send formData via POST to our controller that should create a collectionType page with a dynamicZone content with multiple components.

In the v4 documentation there’s a green hint:

If you want to upload files for a component, you will have to specify the index of the item you want to add the file to: files.my_component_name[the_index].attribute_name

However this is not working for us.
The media is uploaded to the media gallery but not linked to the component inside of the dynamic-zone.
(a media outside of the dynamic-zone gets linked correctly)

So my questions…

  1. Is this even working in v4 or just some “promise for the future”?
  2. In v3 it was files.my_name_of_the_dynamic_zone[the_index].attribute_name - so we also assumed a typo here, but that is also not working.

Can anyone confirm or explain how we can upload images via REST in one request to components inside a dynamic-zone, like we did in v3?

Cheers,
Olaf - lost in v4 migration since 4 days -

2

I am currently stucked at the exact same thing. can anybody provide an example how this

files.my_component_name[the_index].attribute_name (Upload - Strapi Developer Docs )

works?

In my collection type the non nested media attributes are getting correctly assigned.

Example:
files.avatar does work in my formData on save the attribute avatar is filled with the new uploaded file/image.

files.todolist[0].img does not work. The file is uploaded to the media library but is not assigned to my nested field todolist[0].img while todolist is a dynamic zone and at position 0 there is a component with an attribute called img

In strapi v3 I did the exact same thing and it was working fine.

EDIT: I am using a custom controller and no create/update core controller from my entity. I am trying to get this working with my own controller logic

3

Update: I tried it with the core controller without success.

Same behaviour as the custom controller. I dont know whats the problem here. Help would be much appreciated.

Here is a screenshot with my configuration (Content types builder and Postman):

4
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and this is my custom controller:

async customCreate(ctx) {
    console.log(ctx.is("multipart"));

    if (ctx.is("multipart")) {
      const { data, files } = parseMultipartData(ctx);
      
      const entry = await strapi.entityService.create(pageApi, {
        data: { ...data },
        files: { ...files },
      });
      
      return entry;
    }
}

Can anybody help me out?

1 Like
4

Thanks for sharing @CucumberJoe.

The problem with uploading images to component is also described here:

So it seems to be a bug in v4 and I consider delaying the migration to v4 until basic functionalities work like they did in v3. (though for you this might be not an option)

5

Hi, I’m also facing the same problem. In my case, I can upload image file to my ‘music’ field when creating entries via strapi.entityService like this:

await strapi.entityService.create(“api::article.article”, {
data: article,
files: {
music: {
path: filePath,
name: fileName,
type: mime.lookup(filePath),
size: stats.size,
}
},
});

However, I don’t know how to upload image file to component’s field, what if, my ‘music’ field is within a ‘content’ component, then how can I upload using the method I provided ?

Please help me out @lolafkok @CucumberJoe

6

Has this been resolved? I am facing the same issue.

7

Yes, I was able to solve it with this code:

await strapi.entityService.create(“api::article.article”, {
data: article,
files: {
“content.music”: {
path: filePath,
name: fileName,
type: mime.lookup(filePath),
size: stats.size,
}
},
populate: [“content.music”],
});

8

Hi,

Anyone can solve this using REST POST “/upload” ?

    $data = [
        "files" => $file,
        "ref" => "api::blog-post.blog-post",
        "field" => "blocks.media[0].image",
        "refId" => 5,
    ];

I have a dynamic zone called “blocks” and a component called “media”

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1 Like