Support custom mutations

[gpavlov2016]

Before opening, please confirm:

• I have searched for duplicate or closed issues and discussions.

Language and Async Model

Java, Kotlin, Kotlin - Coroutines

Amplify Categories

GraphQL API

Gradle script dependencies

// Put output below this line
aws-api = { module = "com.amplifyframework:aws-api", version.ref = "awsApi" }
core = { module = "com.amplifyframework:core", version.ref = "awsApi" }
awsApi = "2.14.11"

Environment information

# Put output below this line
------------------------------------------------------------
Gradle 8.4
------------------------------------------------------------

Build time:   2023-10-04 20:52:13 UTC
Revision:     e9251e572c9bd1d01e503a0dfdf43aedaeecdc3f

Kotlin:       1.9.10
Groovy:       3.0.17
Ant:          Apache Ant(TM) version 1.10.13 compiled on January 4 2023
JVM:          11.0.22 (Oracle Corporation 11.0.22+9-LTS-219)
OS:           Windows 11 10.0 amd64

Please include any relevant guides or documentation you're referencing

No response

Describe the feature request

Add the ability to run custom mutation either by autogenerating from schema or building using a graphQL string.
For example, for the mutation defined in JS as follows:

Impression: a.model({
    videoId: a.string().required(),
    impressions: a.integer().default(0)
  }).identifier(['videoId'])
  .authorization([
    a.allow.public().to(['read'])
  ]),

  increaseImpression: a
    .mutation()
    // arguments that this query accepts
    .arguments({
      videoId: a.string()
    })
    // return type of the query
    .returns(a.ref('Impression'))
    // only allow signed-in users to call this API
    .authorization([a.allow.public()])
    .handler(a.handler.custom({
      dataSource: a.ref('Impression'),
      entry: './increment-impression.js'
    }))

GraphQL Mutation:

mutation MyMutation {
  increaseImpression(videoId: "1") {
    impressions
  }
}

Initialization steps (if applicable)

No response

Code Snippet

// Put your code below this line.

amplifyconfiguration.json

No response

GraphQL Schema

// Put your schema below this line

Additional information and screenshots

No response

[joon-won]

Hi @gpavlov2016 , thank you for your feature request. We will take a look into the request at our earliest convenience to determine if this is something we want to take on.