Document SDL schema export in the book
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- [Schema](define_schema.md)
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- [Query and Mutation](query_and_mutation.md)
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- [Subscription](subscription.md)
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- [SDL Export](sdl_export.md)
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- [Utilities](utilities.md)
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- [Field guard](field_guard.md)
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- [Input value validators](input_value_validators.md)
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docs/en/src/sdl_export.md
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docs/en/src/sdl_export.md
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# SDL Export
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You can export your schema in Schema Definition Language (SDL) by using the `Schema::sdl()` method.
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```rust
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use async_graphql::*;
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struct Query;
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#[Object]
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impl Query {
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async fn add(&self, u: i32, v: i32) -> i32 {
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u + v
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}
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}
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#[tokio::main]
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async fn main() {
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let schema = Schema::build(Query, EmptyMutation, EmptySubscription).finish();
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// Print the schema in SDL format
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println!("{}", &schema.sdl());
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}
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```
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