A simple "bring your own queries and types" GraphQL client.
- I want to use my own Rust structures and not have them generated by macros
- I want to use my own queries and not have them generated by macros
- I want to manage queries as strings in my Rust code
- For now it's very young, the API may grow and change
- There's already a popular and well tested GraphQL client in Rust
The github stars example demonstrates querying GitHub's GraphQL API to get the number of stars of a repository.
First create a client, that you may keep and reuse:
let mut graphql_client = GraphqlClient::new("https://api.github.com/graphql")?;
graphql_client.set_bearer_auth("your-github-api-token");
You need the struct into which to deserialize the server's answer:
#[derive(Deserialize)]
pub struct Repository {
stargazers: Count,
}
(Count
is a utility struct provided by byo_graphql, it's just struct Count { totalCount: usize }
)
And you need a query:
let query = r#"{
repository(owner: "Canop", name: "bacon") {
stargazers {
totalCount
}
}
}"#;
note: in the example's complete code, the query is dynamically built with format!
, as you'll usually do.
Now you can fetch the data:
let repo: Repository = graphql_client.get_first_item(query).await?;
let stars: usize = repo.stargazers.into();
The github issues example demonstrates how to query a long list with a cursor based exchange.