Object of type InMemoryUploadedFile is not JSON serializable

[yoelvysmartinez]

When I use the FileUploadGraphQLView view, messages thrown by graphene can not return them, Only replies

Object of type InMemoryUploadedFile is not JSON serializable

The frontend developers will not know what field is missing or what was the error that I identify by graphene

[yoelvysmartinez]

this error only occurs in mutations that have an upload file and some required field is missing due to mutation input.

Graphene throws an error like this

"error": {
"errors": [
{
"message": "Variable "$input" got invalid value {"invoice": {"details": [{"cptOid": 1234, "discount": 50, "preliminar": 60}, {"cptOid": 345, "discount": 50, "preliminar": 60}], "documentDate": "2018-03-29", "documentNumber": "KUT23", "fileOid": 116, "icdOid": 221}}.\nIn field "invoice": In field "attached": Expected "Upload!", found null.",
"locations": [
{
"line": 1,
"column": 24

But FileUploadGraphQLView no show this message

[japrogramer]

you might want to try

 attachment = Upload(required=False)

[japrogramer]

probably related to my issue #32

[yoelvysmartinez]

probably related to my issue #32

No, that's not the problem, change to required = false and it did not work. The problem is that FileUploadGraphQLView is not throwing graphene errors.

[japrogramer]

Yes, the required is false is what I thought my help.

But than in my case what you were experiencing also turned out what was happening to my post.

[kingzbauer]

I traced the error to this line https://github.com/graphql-python/graphql-core-legacy/blob/master/graphql/execution/values.py#L76
In my case, I was using SerializerMutation and graphql was not being able to parse my date string as type Date while checking if client inputs are valid. In that case, graphql is trying to json serialize the input which includes the InMemoryUploadedFile so as to display the error, hence the error mentioned is raised in the process.

As state, I believe it's the same issue as #32