Is it possible to chain a query and a mutation into the same GraphQL call?

[nbouvrette]

Let's say I want to search for a user with a specific email and if this user exists, create a token assigned to this user id - is this feasible in a single request, or do I need to make 2 requests (one query, one mutation)?

I couldn't find any example of this type of scenario anywhere.

[adas98012]

@nbouvrette
You can use Hasura Actions for this use case. Here is the reference doc

[nbouvrette]

Thanks @adas98012 - I saw the UserLogin example from the doc but unless I am misunderstanding, this would create the following circular sequence for us which would not be desirable:

• We call the action
• The action call back our API handler
• The API handler call back Hasura with a query to find the user
• The API handler calls Hasura again with a mutation to create a token
• The action returns the handler's output

This is actually 3 different GraphQL calls on top of more code to maintain which complexify the architecture.

What I am looking for is the following sequence:

• We call Hasura with a Query + Mutation query to do a single transaction that:
  • Finds if a user exists
  • If it exists, do a mutation to create a token

Based on your answer I presume this is not doable today?

[adas98012]

@nbouvrette
Thanks for the update. Actually, in your case, the action will be a Hasura Query (to find the user) and the Token Creation will be part of the Handler (which will have the mutation that creates and returns the Token).

We have a previous webinar that you may find informative.

Please let us know if you need any additional info.

[nbouvrette]

Yes, actually I asked a similar question on Stackoverflow and I think I got the answer I was looking for:

This is not possible today.

Also, I was shared with this link which is an RFC being worked on to support that kind of feature: #1573