No field coming from Contact subtype

[Treast]

I've created a Contact subtype (Contact_particulier), and created a profile using this subtype (only email is set from Contact). I imported the form on another website, but only the email fields is shown. I checked the response, and fields are not well defined :

{
   "is_error":0,
   "version":3,
   "count":6,
   "values":{
      "prefix_id":{
         "api.aliases":[
            
         ],
         "name":"prefix_id"
      },
      "first_name":{
         "api.aliases":[
            
         ],
         "name":"first_name"
      },
      "last_name":{
         "api.aliases":[
            
         ],
         "name":"last_name"
      },
      "custom_57":{
         "api.aliases":[
            
         ],
         "name":"custom_57"
      },
      "email-primary":{
         "name":"email",
         "type":2,
         "title":"Courriel",
         "description":"Courriel",
         "maxlength":254,
         "size":30,
         "import":true,
         "where":"civicrm_email.email",
         "headerPattern":"\/e.?mail\/i",
         "dataPattern":"\/^[a-zA-Z][\\w\\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\\w\\.-]*[a-zA-Z0-9]\\.[a-zA-Z][a-zA-Z\\.]*[a-zA-Z]$\/",
         "export":true,
         "rule":"email",
         "table_name":"civicrm_email",
         "entity":"email",
         "bao":"CRM_Core_BAO_Email",
         "localizable":0,
         "html":{
            "type":"Text",
            "maxlength":254,
            "size":30
         },
         "add":"1.1",
         "is_core_field":true,
         "api.required":"1",
         "help_pre":null,
         "help_post":null,
         "weight":"4",
         "api.aliases":[
            "email-Primary"
         ]
      },
      "profile_id":{
         "api.required":true,
         "title":"Profile ID",
         "name":"profile_id"
      }
   }
}

[jmcclelland]

Thanks for the report. I suspect this problem is a limitation of APIv3, which this extension depends on. Ultimately we will need to port to APIv4, but that may be a ways off. I may be wrong and am open to PRs to fix this, but unfortunately I won't have time in the near future to work on it.