Does graphql allow conditional execution of a step in a mutation? -

since can have multiple steps run sequentially in mutation, can have conditional if statement in graphql later steps run if result previous step meets condition?

e.g.

 mutation upsertlogin($idtoken: string!, $email: string!, $username: string!) {      user(email: $email, username: $username) {       id     }      // next step if no id from previous step      createuser(email: $email, username: $username) {       id     }    } 

no, graphql doesn't support kind of conditional execution. thing explicitly supported throwing error in 1 mutation in order prevent remainder of mutations running. works because mutations run sequentially.

in theory implement conditionals mention writing , reading context, shared between resolvers, not recommend doing so, because implementations of graphql declare context immutable.