let
// Define the function to accept an optional nextPageToken.
fnGetAllJiraIssuesWithAllFields = (optional nextPageToken as text) as list =>
let
// Construct the query parameters record dynamically.
// We only add the nextPageToken field if it is not null.
QueryOptions = [
jql = "project=PROJECTNAME",
fields = "*all",
maxResults = "1000"
] & (if nextPageToken <> null then [nextPageToken = nextPageToken] else []), // Call the Web.Contents function with the dynamically built query options.
Source = Web.Contents(
"https://SERVERNAME.atlassian.net",
[
RelativePath = "/rest/api/3/search/jql",
Query = QueryOptions
]
), // Process the JSON response.
Json = Json.Document(Source),
Issues = Json[issues], // Check if there is a next page token.
// Record.HasFields is a safe way to check for the field's existence.
NextPageToken = if Record.HasFields(Json, "nextPageToken") then Json[nextPageToken] else null, // Perform the recursion if a next page token exists.
NextPageIssues = if NextPageToken <> null then
@fnGetAllJiraIssuesWithAllFields(NextPageToken)
else
{}, // Combine the results.
AllIssues = Issues & NextPageIssues
in
AllIssues
in
fnGetAllJiraIssuesWithAllFields | 
