GraphQL Mutations

toGraphQL is not enough to generate a mutation query. ngrx-entity-relationship provides a helper function called toMutation which solves the issue.

For example

const query = toMutation(
  toGraphQL(
    'updateUser',
    {
      id: 'id1',
      data: {
        firstName: 'updatedFirstName',
        lastName: 'lastFirstName',
      },
    },
    action.selector,
  ),
);

will generate

mutation {
  updateUser(
    id: "id1"
    data: {
      firstName: "updatedFirstName",
      lastName: "lastFirstName"
    }
  ) {
    id
    # and all other fields with relationships.
  }
}

With Apollo service, it can be used like that

apollo.mutate({
  mutation: gql(
    toMutation(
      toGraphQL(
        'updateUser',
        {
          id: 'id1',
          data: {
            firstName: 'updatedFirstName',
            lastName: 'lastFirstName',
          },
        },
        action.selector,
      ),
    ),
  ),
}).subscribe(update => {
  // magic is here.
});