中继现代兼容模式：undefined不是对象（评估'taggedNode [CLASSIC_NODE]'）

Question

Seeing this error when attempting to save a Compat mode mutation. It seems it may have to do with the Relay-specific part of the query (edge/node). How can we fix this?

Query is minimally updated from what worked in Relay Classic - only the newWorkoutEntryEdge has been fleshed out to fetch the node and child members.

Mutation code:

const mutationQuery = graphql`
mutation AddWorkoutEntryMutation($input: AddWorkoutEntryInput!, 
    $dateOfEntry: String!) {
  AddWorkoutEntry(input: $input) {
    clientMutationId
    newWorkoutEntryEdge {
      node {
        id
        category
        description
        notes
        countOfRepetitions
      }
    }
    userData {
      id,
      workoutEntries(first: 10000,
          dateOfEntries: $dateOfEntry)
        {
        edges {
          node {
            id
            category
            description
            notes
            countOfRepetitions
          }
        }
      }
    }
  }
}`
;
export default function AddWorkoutEntryMutation(
  notes: string,
  countOfRepetitions: string,
  dateOfEntry: string,
  standardWorkoutID: string,
  userDataID: string)
  {
  const variables = {
    input: {
      notes,
      countOfRepetitions,
      dateOfEntry,
      standardWorkoutID
    },
    // possibly redundant
    dateOfEntry
  };
  commitMutation(Relay.Store, { mutationQuery, variables });
}

Answer 1

After tracing this through the Relay code, I realized I was passing an object with mutationQuery as a field, rather than mutation , so Relay couldn't find the expected mutation field.

Changing this

commitMutation(Relay.Store, { mutationQuery, variables });

to this

commitMutation(Relay.Store, { mutation, variables });

solved the problem.