HTTP call error to shopify when sending array in json request - go

Question

This is an http post response to create a new shopify blog.
blog := Blog{
Title: fileNameWithoutExtSliceNotation(doc.Name()),
Template_suffix: "hit_parader_issue_template",
Metafields: []BlogMeta{
{
Key: "filter_tag_list",
Value: "Popular",
Type: "single_line_text_field",
Namespace: "global",
},
},
}
blogJSON, err := json.Marshal(blog)
blogReq, err := http.NewRequest("POST", newBlogQuery, bytes.NewBuffer(blogJSON))
blogReq.Header.Add("X-Shopify-Access-Token", TOKEN)
blogReq.Header.Add("Content-Type", "application/json")
resp1, err := client.Do(blogReq)
my structs are like below
type Blog struct {
Title string `json:"title"`
Template_suffix string `json:"template_suffix"`
Metafields []BlogMeta
}
type BlogMeta struct {
Key string
Value string
Type string
Namespace string
}
im getting an error saying
{"errors":{"blog":"Required parameter missing or invalid"}}
These are my blow metafield definitions.
I have all the necessary fields listed in the following api call. Please help.
Im using below API
https://shopify.dev/api/admin-rest/2022-10/resources/blog#post-blogs
NOTE: the API documentation says that I need to present a array for the metafields. But I think my code is correct. IS there something im missing? Any help would be appreciated.

Answer 1

Looking at the API docs it seems that the blog JSON object should be nested in a root object, i.e. it should be {"blog": {"title": ...,}} rather than {"title": ...,}. If that's the case then that would also explain the error message.
To fix that you can do something like this:
blog := &Blog{
// ...
}
data, err := json.Marshal(map[string]any{"blog": blog})
if err != nil {
return err
}
r, err := http.NewRequest("POST", url, bytes.NewReader(data))
if err != nil {
return err
}
r.Header.Add("X-Shopify-Access-Token", TOKEN)
r.Header.Add("Content-Type", "application/json")
resp, err := client.Do(r)
if err != nil {
return err
}
// ...