3b7ed74d11
- examples to fix still
- error_extensions.md ResultExt example does not compile!
- trait ErrorExtensions is not implemented for ParseIntError
- dataloader
- requires sqlx to work. So we either "stub" it OR we rewrite them simpler to use a simple "faux" db library
50 lines
1.2 KiB
Markdown
50 lines
1.2 KiB
Markdown
# Query and Mutation
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## Query root object
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The query root object is a GraphQL object with a definition similar to other objects. Resolver functions for all fields of the query object are executed concurrently.
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```rust
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# extern crate async_graphql;
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use async_graphql::*;
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# #[derive(SimpleObject)]
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# struct User { a: i32 }
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struct Query;
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#[Object]
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impl Query {
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async fn user(&self, username: String) -> Result<Option<User>> {
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// Look up users from the database
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# todo!()
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}
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}
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```
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## Mutation root object
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The mutation root object is also a GraphQL object, but it executes sequentially. One mutation following from another will only be executed only after the first mutation is completed.
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The following mutation root object provides an example of user registration and login:
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```rust
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# extern crate async_graphql;
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use async_graphql::*;
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struct Mutation;
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#[Object]
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impl Mutation {
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async fn signup(&self, username: String, password: String) -> Result<bool> {
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// User signup
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# todo!()
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}
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async fn login(&self, username: String, password: String) -> Result<String> {
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// User login (generate token)
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# todo!()
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}
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}
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```
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