How to create multiple batch mutations

[pjsandwich]

Amplify CLI Version

12.12.6

Question

Which of these are the correct way to create more than one batch mutation with a custom cdk resolver?

type Mutation {
  batchCreateTodo(todos: [BatchCreateTodo]): [Todo]
}

type OtherMutation {
...
}

Or

type Mutation {
  batchCreateTodo(todos: [BatchCreateTodo]): [Todo]
  someOtherBatch(things: [BatchCreateThings]): [Things]
}

I see that the typeName field should be Query | Mutation | Subscription:

const resolver = new appsync.CfnResolver(this, 'batchCreateToDo', {
      apiId: apiIdRef,
      fieldName: 'batchCreateToDo',
      typeName: 'Mutation', // Mutation type
      requestMappingTemplate: requestVTL,
      responseMappingTemplate: responseVTL,
      dataSourceName: 'ToDoTable', // DataSource name
    });

But how should an additional batch mutation be added to the schema and does the typeName or the resolver code need to be adjusted in a certain way on the existing toDo resolver or the new resolver?

[AnilMaktala]

Hey @pjsandwich, Thank you for raising this. Yes, you can create multiple batch mutations using the same approach as batchCreateToDo, with the TypeName always being Mutation in this case. Below is a sample code snippet for BatchCreateThings.

type Mutation {
  batchCreateTodo(todos: [BatchCreateTodo]): [Todo]
  someOtherBatch(things: [BatchCreateThings]): [Things]
}

const thingsresolver = new appsync.CfnResolver(this, 'someOtherBatch', {
      apiId: apiIdRef,
      fieldName: 'someOtherBatch',
      typeName: 'Mutation', // Mutation type
      requestMappingTemplate: requestVTL,
      responseMappingTemplate: responseVTL,
      dataSourceName: 'ThingsTable', // DataSource name
    });

[pjsandwich]

Thank you @AnilMaktala , I will try this out and get back to you here

[pjsandwich]

This works! Thanks @AnilMaktala

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