Mixins should be exposed as GraphQL Interfaces

[tajakobsen]

Problem

I create very very large mixins that are used by multiple content types.

When wanting to query these out with GraphQL I can't reuse a fragment, because there is not a common interface between the types.

I have to duplicate 100s of lines in my queries for each content type, which are difficult to maintain.

Solution

Guillotine should generate Interfaces for mixins in the project. The types using the mixins should use the implements keyword to indicate that an interface is being used.

This should allow developers to create fragments that can be used across content types (and components etc.).

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Bonus (maybe)

There might be an optimisation here too. But it's a breaking change.

If inside a <form>...</form> there is only one <mixin name="..." /> then the type is that just that interface. Right?

This could mean a shared type/interface can be used, and Guillotine doesn't need to generate duplicate for same-shape types.

[sigdestad]

This looks like a backward compatible improvement, and is an interesting feature - also worth noticing that XP's mixins will be re-named to fragments in XP8.