Add page info field to connection object

[JunichiSugiura]

This PR adds pageInfo fields in all connection object exposed by Torii in order to enable server side pagination.

[JunichiSugiura]

References

• https://stackoverflow.com/a/66300422
  • maybe i should get rid of fetch_page_info and and fetch N+2 queries on fetch_multiple_rows

[broody]

#ikuzooo

Do you mind adding optional page_info member and simple test case for cursor based pagination?

dojo/crates/torii/graphql/src/tests/mod.rs

Line 40 in 62980bb

pub struct Connection<T> {

dojo/crates/torii/graphql/src/tests/entities_test.rs

Line 115 in 62980bb

// pagination testing

[JunichiSugiura]

@broody How can I return Null for nested object?

Current error

Because I'm returning Value::Null here I think.

[broody]

@broody How can I return Null for nested object?

Ah this is an issue, in the schema, nested objects are by default nullable but then we reject null values. I'll fix this, but for page_info I think we do want a non-null value object.