For custom types

[huanyu-li]

Hi,

I just have a question regarding how to create a type for my data rather than basic scalar types (int, string, boolean, float and ID). For instance, I may need to represent double datatype to datetme datatype.

Thank you in advance.
Best,
Huanyu Li

[rafalp]

I'm not sure what you mean? Are you looking to define custom types in GraphQL schema? Have you seen this document?

[huanyu-li]

Thanks for your reply.
I'm building a GraphQL application over some data sources where there are date time type data. I'm not sure how to define a GraphQL schema to represent date time data.

[rafalp]

I see, you want custom scalar then. Here is documentation how to make one with examples including datetime:

https://ariadnegraphql.org/docs/scalars

[khanakia]

The documentation is not quite clear after I define the scalar how do register it ?

JSON = ScalarType("JSON", serializer=lambda v: v, value_parser=lambda v: v)

Now where to register the JSON field ?

[rafalp]

You pass it to make_executable_schema.