Hi. Does GraphQL kotlin preserve order of certain ...

# graphql-kotlin

[Das135]

Hi. Does GraphQL kotlin preserve order of certain functions send in one graphql request?
I have something like this:

mutation {
  deleteObj1(where){
    affectedRows
  }

  deleteObj2(where){
    affectedRows
  }

  deleteObj3(where){
    affectedRows
  }

  deleteObj4(where){
    affectedRows
  }
}

If order of executed functions will change, there can be thrown foreign key constraint condition -> I need to execute mutations like DELETE CASCADE...

[Lenny]

The actual graphql executor comes from graphql-Java, and I’m sure it’s spec-compliant and runs mutations in sequence, top to bottom.

But if you need transactionality, you should really wrap these up in a single mutation

[Dariusz Kuc]

if you use graphql-kotlin-spring-server then by default yes they will execute sequentially, that being said - as was pointed above I’d highly recommend to refactor your schema to expose single mutation that handles all of that

[Dariusz Kuc]

*you could manually manage transaction around the whole request but I think it would be much simpler in single mutation

[Dariusz Kuc]

see: https://graphqlme.com/2018/05/13/transactions-mutations-and-graphql/ for a pretty good write up on this topic

[Chris Voy]

Treat each mutation independently. Just like with resolvers, how you execute (serially, sequentially) is implementation detail.