[SOLVED] How to perform Mutation in sangria-graphql?

How to perform Mutation in sangria-graphql?

Currently, I'm learning sangria-graphql from here. However, I could not find any documentation for Mutation (Add, Update, Delete). Also, google won't help me much. So, can you guys provide me with any good resources?

Solution

Mutations in GraphQL are modeled as an object type, just like the Query type. GraphQL schema has 3 top-level entry points which are modeled as object types:

Query type - the root for the queries
Mutation type - the root for the mutations
Subscription type - the root for the subscriptions

When you created the scheme, you can provide all 3 of them:

Schema(QueryType, Some(MutationType), Some(SubscriptionType))

Otherwise, mutations work very similar to queries, except that the mutation top-level fields are executed sequentially (guaranteed not to execute in parallel).

For further info and examples, I would recommend you to check sangria-subscriptions-example which demonstrates mutation and subscriptions in addition to normal queries. I would suggest you to start at schema definition:

https://github.com/sangria-graphql/sangria-subscriptions-example/blob/master/src/main/scala/schema.scala#L87