Method Update

pkg/cmd/discussion/client/client.go:1029–1100

Update updates a discussion's fields and/or labels. If field updates succeed but the label mutation fails, the returned discussion is non-nil (reflecting the updated fields without label changes) and err describes the label failure.

(repo ghrepo.Interface, input UpdateDiscussionInput)

// but the label mutation fails, the returned discussion is non-nil (reflecting
// the updated fields without label changes) and err describes the label failure.
func (c *discussionClient) Update(repo ghrepo.Interface, input UpdateDiscussionInput) (*Discussion, error) {
	hasFieldUpdate := input.Title != nil || input.Body != nil || input.CategoryID != nil
	hasLabelUpdate := len(input.AddLabelIDs) > 0 || len(input.RemoveLabelIDs) > 0

	if !hasFieldUpdate && !hasLabelUpdate {
		return nil, fmt.Errorf("nothing to update")
	}

	var node *discussionListNode

	if hasFieldUpdate {
		gqlInput := githubv4.UpdateDiscussionInput{
			DiscussionID: githubv4.ID(input.DiscussionID),
		}
		if input.Title != nil {
			gqlInput.Title = githubv4.NewString(githubv4.String(*input.Title))
		}
		if input.Body != nil {
			gqlInput.Body = githubv4.NewString(githubv4.String(*input.Body))
		}
		if input.CategoryID != nil {
			id := githubv4.ID(*input.CategoryID)
			gqlInput.CategoryID = &id
		}

		var mutation struct {
			UpdateDiscussion struct {
				Discussion struct {
					discussionListNode
				}
			} `graphql:"updateDiscussion(input: $input)"`
		}

		variables := map[string]interface{}{
			"input": gqlInput,
		}

		if err := c.gql.Mutate(repo.RepoHost(), "UpdateDiscussion", &mutation, variables); err != nil {
			return nil, err
		}

		node = &mutation.UpdateDiscussion.Discussion.discussionListNode
	}

	var secondaryErrs []error
	if hasLabelUpdate {
		labelNode, err := c.editDiscussionLabels(repo, input.DiscussionID, input.AddLabelIDs, input.RemoveLabelIDs)
		if err != nil {
			secondaryErrs = append(secondaryErrs, err)
		} else {
			node = labelNode
		}
	}

	if node == nil {
		return nil, errors.Join(secondaryErrs...)
	}