How to solve error when adding big number of tables

问题

I have this Google Script where I am creating a document using a template table that lives in another document.

The new document will have a number of small tables (like cards) in it. The code bellow works fine for 100, 200 tables and it finishes in less than 10 seconds. But it fails for more than 500 tables. There is no error message in the Executions window.

I have tried the saveAndClose() function (commented out) but the error continues and it just takes longer to run.

I ran out of ideas how to fix that. Any help or ideas will be appreciated.


function insertSpecification_withSection(){
  startTime = new Date()
  console.log("Starting Function... "); 
  
  // Retuns a Table Template Copied from another Document
  reqTableItem = RequirementTemplate_Copy();
  
  
  // Creates X number of separated tables from the template
  for (var i = 0; i < 500; i++){
    table = DocumentApp.getActiveDocument().getBody().appendTable(reqTableItem.copy());

    //    if((i % 100) === 0) {
    //      DocumentApp.getActiveDocument().saveAndClose();
    //    }
    //    
    
  }
  endTime = new Date();
  timeDiff = endTime - startTime;
  console.log("Ending Function..."+ timeDiff + " ms"); 
  
}

function RequirementTemplate_Copy() {

  //---------------------------------------------------------------------------------------------------------------------------------------------------
  var ReqTableID = PropertiesService.getDocumentProperties().getProperty('ReqTableID');
  try{
    var templatedoc = DocumentApp.openById(ReqTableID);
  } catch (error) {
    DocumentApp.getUi().alert("Could not find the document. Confirm it was not deleted and that anyone have read access with the link.");
    //Logger.log("Document not accessible", ReqTableID)
  } 
  var reqTableItem = templatedoc.getChild(1).copy();
  //---------------------------------------------------------------------------------------------------------------------------------------------------
  return reqTableItem
}

回答1:

Instead of using a long method chaining to append the tables inside the for loop, declare a variable for the document body before the for and use it inside the for. In other words,

replace

 // Creates X number of separated tables from the template
  for (var i = 0; i < 500; i++){
    table = DocumentApp.getActiveDocument().getBody().appendTable(reqTableItem.copy());

 var body = DocumentApp.getActiveDocument().getBody();
 // Creates X number of separated tables from the template
  for (var i = 0; i < 500; i++){
    table = body.appendTable(reqTableItem.copy());

The above code was tested with the following template

The script finished without errors. The resulting document has 50 pages.

回答2:

Just like mentioned in the other answer, it is best to save the document outside the loop and call it when needed. Same goes for the body of the document.

let currentDoc = DocumentApp.getActiveDocument();
let bodyDoc = currentDoc.getBody();
for (var i = 0; i < 500; i++){
    table = bodyDoc.appendTable(reqTableItem.copy());
    //    if((i % 100) === 0) {
    //      currentDoc.saveAndClose();
    //    }
    //    
  }

However, since you are mentioning that you are receiving the Exception: Service Documents failed while accessing document with id error, you might want to take a look at this issue on Issue Tracker since what you are experiencing might be a bug with Apps Script.

If this is the situation, I recommend you to star the issue and eventually add a comment saying that you are affected by it.

Reference

Apps Script Best Practices.

来源：https://stackoverflow.com/questions/64828185/how-to-solve-error-when-adding-big-number-of-tables

标签

google-apps-script

google-docs