[BUG] Pydantic model `QueryParameter` not returning json dict in `GraphQLQuerier.post_graph_ql`

[koksang]

Problem

• When trying to run code cell 1 in example notebook, it complains about TypeError: Object of type QueryParameter is not JSON serializable.
• Seems to me like when we have query with parameters, the QueryParameter pydantic model is not returned as json dict before GraphQLQuerier.post_graph_ql function happens.
• Hence in httpx request, it is unable to encode parameters which is a list of QueryParameter objects rather than json text.

Screenshot

How to replicate the problem?

• I use poetry to install based on pyproject.toml from this repo and simply run the example

Potential solutions

• Check parameters from variables argument in GraphQLQuerier.post_graph_ql function before calling the api