Does Cynic support a single mutation running multiple queries?

[jman-schief]

hello,

is it possible to build a single mutation executing multiple operations?

Example: add two comments on github in a single blow (edited the cynic github mutation example).

mutation ($commentBody: String!, $commentBody2: String!) {
	m1:addComment(
		input: {
			body: $commentBody
			subjectId: "MDU6SXNzdWU2ODU4NzUxMzQ="
			clientMutationId: null
		}
	) {
		commentEdge {
			node {
				id
			}
		}
	}
	m2:addComment(
		input: {
			body: $commentBody2
			subjectId: "MDU6SXNzdWU2ODU4NzUxMzQ="
			clientMutationId: null
		}
	) {
		commentEdge {
			node {
				id
			}
		}
	}
}

variables:

{
	"commentBody": "First comment",
	"commentBody2": "Second comment"
}

thanks

[obmarg]

Hi @jman-schief - i'm pretty sure this should be possible. You just need to use the rename attribute to tell cynic that m1 & m2 are actually the addComment fields. I tried putting your query into the generator and it gave me this, which hopefully illustrates the idea:

#[cynic::schema_for_derives(
    file = r#"schema.graphql"#,
)]
mod queries {
    use super::schema;

    #[derive(cynic::QueryVariables, Debug)]
    pub struct UnnamedQueryVariables {
        pub comment_body: String,
        pub comment_body2: String,
    }

    #[derive(cynic::QueryFragment, Debug)]
    #[cynic(graphql_type = "Mutation", variables = "UnnamedQueryVariables")]
    pub struct UnnamedQuery {
        #[arguments(input: { body: $comment_body, clientMutationId: null, subjectId: "MDU6SXNzdWU2ODU4NzUxMzQ=" })]
        #[cynic(rename = "addComment")]
        pub m1: Option<AddCommentPayload>,
        #[arguments(input: { body: $comment_body2, clientMutationId: null, subjectId: "MDU6SXNzdWU2ODU4NzUxMzQ=" })]
        #[cynic(rename = "addComment")]
        pub m2: Option<AddCommentPayload>,
    }

    #[derive(cynic::QueryFragment, Debug)]
    pub struct AddCommentPayload {
        pub comment_edge: Option<IssueCommentEdge>,
    }

    #[derive(cynic::QueryFragment, Debug)]
    pub struct IssueCommentEdge {
        pub node: Option<IssueComment>,
    }

    #[derive(cynic::QueryFragment, Debug)]
    pub struct IssueComment {
        pub id: cynic::Id,
    }

    #[derive(cynic::InputObject, Debug)]
    pub struct AddCommentInput {
        pub body: String,
        pub client_mutation_id: Option<String>,
        pub subject_id: cynic::Id,
    }

}

mod schema {
    cynic::use_schema!(r#"schema.graphql"#);
}

[obmarg]

Although just a note on this example: it's generatd using the generator for the unreleased v2 of cynic - if you're using v1 then you probably want to put the query into the v1 generator here. Pretty sure v1 should still support this pattern.

[jman-schief]

Thank you so much for the suggestion, as I am dipping my toes into this library, I wasn't aware of the rename attribute (and can't find documentation or usage examples) but as you have noticed¹ I've discovered your struct generator :)

I love how the v2 of this library is shaping up, for the moment I'll stick to the v1 and eventually port it when there's an official release.

Thanks again

Footnotes

1. I've cleaned up my mess on the PR, sorry about that ↩