Lesson 02 · 10 min
Schema and types
type, fields, ! and lists. Query is the entry point for reads.
10 minLesson 2 of 9Practice includedAsk AI on any point
The schema is written in SDL. Object types describe entities, scalars describe values: String, Int, Float, Boolean, ID. ! means "can't be null", and [Book!]! is a non-null list of non-null books. The special Query type lists what can be read.
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