CODEWITHSUNDEEP
google-apps-scriptgmail-api
Vytautas
Vytautas

Reputation: 2286

Gmail API message.list from trigger

I am having a problem creating an google script that would run every night. The code runs fine when I run it from the script file and behaves as expected, however when performed by an installed trigger I get the following:

TypeError: Cannot read property "length" from undefined. (line 17, file "Main")

EDIT: To be clear I know that the particular query used has to return results as running the same script from the script editor works fine

Code:

function doGet(query) {
  var sSheet = sheetSelect(),  //calls spreadsheet selection function and assigns the spreadsheet to variable
      queriedMessages,         //object to store the queried messages list
      pageToken,               //string token value that will be pulled from the queredMessages
      auth = 'me';

  if (!query) query = 'in:all newer_than:1d -is:chats -in:trash';
  do {
    queriedMessages = Gmail.Users.Messages.list(auth, {'q':query, 'pageToken':pageToken});  //callls the Gmail API to query messages
    dataOutput(sSheet, queriedMessages.messages, queriedMessages.messages.length);          //calls function to output all data to spreadsheet from the current list
        pageToken = queriedMessages.nextPageToken;                                              //gets the next page token from the list
      }

  while (pageToken);                                                                        //the loop is executed until there are no more next page tokens left
}

Any ideas why it behaves so differently? I have tried providing userId for a specific e-mail. Seems like this might be some kind of authentication issue but I cannot figure out how to fix it other than forgetting about Gmail API and go a roundabout way of using Gmail App as it seems to be an issue with Gmail API method messages.list()

Thank You for any help in advance!

I managed to fix the issue. The problem was me wanting to leave an option to pass on a query with the function call. The problem then is that the installed trigger actually passed on a variable to the query variable and a new one is then not set.

Upvotes: 2

Views: 710

Answers (1)

Tholle
Tholle

Reputation: 112827

I think it's much simpler than that. If I list messages in the last day, I get:

Request:

GET https://www.googleapis.com/gmail/v1/users/me/messages?q=newer_than%3A1d

Response:

{
 "messages": [
    {
     "id": "150612f9d7f83db9",
     "threadId": "150611d4e92b7a5f"
    }, ...
  ]
}

If I list messages in the last second, I get:

Request:

GET https://www.googleapis.com/gmail/v1/users/me/messages?q=newer_than%3A1s

Response:

{
 "resultSizeEstimate": 0
}

In other words, queriedMessages.messages will be undefined if you get no messages with that particular query, and queriedMessages.messages.length will give rise to your error.

Upvotes: 1

Related Questions