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How to document merge a parent record and all of its child records

I'm creating a document merge (mail merge) from Google App Maker to a Google Document template. I can do so successfully when merging one single record, but how do you merge several records into the one document?
I have an purchase_orders parent record which has several purchase_order_line_items child records but I can't seem to get all of these records into a single document merge.
A similar question (Document Merge with Google App Maker) was asked by by Johan W with a comprehensive answer by Markus Malessa and Pavel Shkleinik (thank you!). However, it only caters for cases when you are merging one single record.
I have tried to build on their answer by using a second for loop to get the data of all associated child records. The script runs but only seems to merge the first child record; not all of them.
Here is an example of the server-side code I've tried to use:
function Export(key, key2) {
// Get the parent record by its key, which was passed by the first parameter above
var record = app.models.Purchase_Orders.getRecord(key);
// Get the first child record by its key, which was passed by the second parameter above
var childRecord = app.models.Purchase_Order_Line_Items.getRecord(key2);
// Get the Google Document which will be used as a template for this merge
var templateId = '1Xbt8camqHJYrhBnx0a6G2-RvTvybqU0PclHifcdiLLA';
//Set the filename of the new merge document to be created
var filename = 'Document for Customer ' + new Date();
//Make a copy of the template to use as the merge document
var copyFile = DriveApp.getFileById(templateId).makeCopy(filename);
//Get the Google Docs ID of the newly created merge document
var copyDoc = DocumentApp.openById(copyFile.getId());
var copyBody = copyDoc.getBody();
// Replace the field names in the template with the field data from the parent record
var fields = app.metadata.models.Purchase_Orders.fields;
for (var i in fields) {
console.log(i);
var text = '<<' + fields[i].name + '>>';
var data = record[fields[i].name];
if (data !== null) {
copyBody.replaceText(text, data);
} else {
// do nothing
}
}
// Replace the field names in the template with the field data from the child records
childFields = app.metadata.models.Purchase_Order_Line_Items.fields;
for (i in childFields) {
console.log(i);
var childtext = '<<' + childFields[i].name + '>>';
var childdata = childRecord[childFields[i].name];
if (childdata !== null) {
copyBody.replaceText(childtext, childdata);
} else {
// do nothing
}
}
}
How can I improve my code so that all associated child records are merged into a single document?
How can I set up my Google Document template to cater for any number of child records?

Rather than passing in the child record key via a second parameter, I would suggest just passing in the parent key and then changing your function as follows:
function Export(key) {
// Get the parent record by its key, which was passed by the first parameter above
var record = app.models.Purchase_Orders.getRecord(key);
// Get the first child record by its key, which was passed by the second parameter above
var childRecords = record.Purchase_Order_Line_Items;
// Get the Google Document which will be used as a template for this merge
var templateId = '1Xbt8camqHJYrhBnx0a6G2-RvTvybqU0PclHifcdiLLA';
//Set the filename of the new merge document to be created
var filename = 'Document for Customer ' + new Date();
//Make a copy of the template to use as the merge document
var copyFile = DriveApp.getFileById(templateId).makeCopy(filename);
//Get the Google Docs ID of the newly created merge document
var copyDoc = DocumentApp.openById(copyFile.getId());
var copyBody = copyDoc.getBody();
// Replace the field names in the template with the field data from the parent record
var fields = app.metadata.models.Purchase_Orders.fields;
for (var i in fields) {
console.log(i);
var text = '<<' + fields[i].name + '>>';
var data = record[fields[i].name];
if (data !== null) {
copyBody.replaceText(text, data);
} else {
// do nothing
}
}
// Replace the field names in the template with the field data from the child records
var childFields = app.metadata.models.Purchase_Order_Line_Items.fields;
var table = [];
var tableheader = [];
for (i in childFields) {
console.log(i);
tableheader.push(childFields[i].displayName);
}
table.push(tableheader);
for (i in childRecords) {
var data = [];
for (var j in childFields) {
data.push(childRecords[i][childFields[j].name]);
}
table.push(data);
}
copyBody.appendTable(table);
The table building is based on a 2D array and the documentation is here https://developers.google.com/apps-script/reference/document/table. But you will also need to remove your prebuilt table in favor of just appending a table instead. This way you are not dependent on the quantity of child records being fixed like they currently are in your document template. Also, the variable for childRecords may or may not work, I have not tested this since I am unsure if prefetch works in conjunction with .getRecord(key). This may require some additional testing but hopefully this will provide enough guidance.
Thought I would add this as an alternative. Lets say you keep your table but remove all the rows with exception for the header row then you could still use DocumentApp service to add your rows to the table like so:
var tableheaderfieldnames = ['Quantity_for_PO', 'Inventory_Item.id', 'Unit_Price']; //set a fixed table header with the field names, uncertain if the table header for the related inventory item will work or not
var table = copyBody.getTables()[0];
for (i in childRecords) {
var row = table.appendRow();
for (var j in tableheaderfieldnames) {
row.appendTableCell(childRecords[i][tableheaderfieldnames[j]]);
}
}
Keep in mind that AM does not allow you to use FK references, so for your inventory item that appears to use a fk field you may need to tinker around with setting the proper name reference for when you are trying to fill in the item in your table.

Add a new child in Firebase

So my situation is a bit different to issues found online.
I want the node Societies to be updated with a new child node Foot19 when the button is pressed. The context is that it is a list of school groups that when the user presses on the button to 'follow' them, the ID to that group is added to their personal data section.
So when they click addFootballSoc button Foot19 is added as a new child node to their specific Societies node.
The key values in the at the start of each sUsers node is equivalent to their authentication uid which is why I'm calling it using firebase.auth()
document.getElementById('addFootballSoc').onclick = function() {addFootball()};
function addFootball(){
var runUid = firebase.auth().currentUser.uid;
var searchRef = firebase.database().ref('sUsers');
var newSearchRef = searchRef.child(runUid);
var mm = newSearchRef.child('Societies')
mm.child.set('Foot19'){}
}
I want it to add a new child for each group they join so they can't overwrite either, for example if I were to add a 'Arts' group button
EDIT:
changed the function so the onclick works and it does now write to where I want,
however, if I were to add another child node alongside Foot19 it will delete Foot19 and replace it, I would use push but I don't want to have the unique key added to my nodes. How can I change this to ensure more nodes can be added?
document.getElementById('addFootballSoc').onclick = function() {addFootball()};
function addFootball(){
var runUid = firebase.auth().currentUser.uid;
var searchRef = firebase.database().ref('sUsers');
var newSearchRef = searchRef.child(runUid);
var mm = newSearchRef.child('Societies')
mm.child.set('Foot19'){}
}

You may be calling the function immediately addFootball() on page load before you have the uid back/resolved from Firebase or looks like you are handing .set the wrong type of data. Try this.
document.getElementById('addFootballSoc').addEventListener("click", function(evt) {
var runUid = firebase.auth().currentUser.uid;
if(runUid){
var searchRef = firebase.database().ref('sUsers');
var newSearchRef = searchRef.child(runUid);
var mm = newSearchRef.child('Societies')
mm.child.set({'Foot19':true});
} else {
console.log("no uid");
}
});

Solved it.
screengrab
The screen grab shows the entries being placed in the child node societies within the users ùid node. The extra entires ALT5 & ASN11 are where I changed the value on line 6 to test that new nodes would not be overwritten.
function addFootball(){
var runUid = firebase.auth().currentUser.uid;
var searchRef = firebase.database().ref('sUsers');
var newSearchRef = searchRef.child(runUid);
newSearchRef.child('Societies').update({
Foot19 : true
})
}

How to delete specific record in firebase having specified Title

I was using Firebase Database in Web App, and have data like this yet:
How can i delete the entire record having "Apple" in title (marked in picture)?
I wrote the below code but it's not working.
Kindly Help.
var abc = firebase.database().ref('firebase-test');
var key_to_delete = 'Apple';
var query = abc.orderByChild('KISNx87aYigsH3ILp0D').equalTo(key_to_delete);
query.on('child_added', function(snapshot)
{
snapshot.ref.remove();
});
It's not giving me any error in Console.

You're ordering/filtering on the wrong property. You have the value of he title property, so should order on that:
var abc = firebase.database().ref('firebase-test');
var key_to_delete = 'Apple';
var query = abc.orderByChild('title').equalTo(key_to_delete);
query.on('child_added', function(snapshot)
{
snapshot.ref.remove();
});
Alternative, since you know the key of the item you want to delete, you can also delete that item without a query:
var abc = firebase.database().ref('firebase-test');
abc.child("KISNx87aYigsH3ILp0D").remove();

How insert,update,delete value of an XML element with Extendscript scriptui

I am learning extendscript for scripting adobe illustrator.It is very difficult for me to write xml related parsing.
My problem statement is given below:- "I have taken three text boxes namely name,city and country."name" is a unique key.when i click ok button the data must be saved in xml if name does not exist else update the previous name with out creating duplicate.All the names in xml file are displayed in list box.The date of particular name could be deleted by remove button.which will remove data in selected item of list box.
The code i tried to do is:-
var myWindow = new Window ("dialog", "Form");
var txt1 = myWindow.add ("edittext");//name unique
var txt2 = myWindow.add ("edittext");//city
var txt3 = myWindow.add ("edittext");//country
var btn=myWindow.add ("button", undefined, "OK");
btn.onClick = function () {
for (i=0;i<numberofnamesinxml;i++)//coding required
{
if(txt1.text!=xmlname[i]) // to verify name not there since it is like primary key
xmlFile.open("a");
xmlFile.write(root.toXMLString());
xmlFile.copy ('C:/data.xml');
xmlFile.close();
//myList refresh
}
}
var myList = myWindow.add ("listbox");
for (i=0;i<numberofnamesinxml;i++)//coding required
{
config='C:/data.xml';
config.open("r");
data= xmlname[i] //here i need to set data to
config.close();
myList.add ("item", data);
}
var btn1=myWindow.add ("button", undefined, "remove");
btn1.onClick = function () {
myList.remove (myList1.selection[i]);
//xml data having this list name must be removed
}
myWindow.show ();
Please kindly help me.

This should not be considered a full answer. I still post it because it might help finding one.
This is what I tried to write as an answer. The read/write part works but the checking of an element exists fails.
if the child is not an exact match, xml.contains(xml) will not return true.
var path = '~/Desktop/test.xml';
var xmlfile = File(path);
if (!xmlfile.exists) {
$.writeln('xml file does not exist. Creating new one');
xmlfile = new File(path);
xmlfile.open('w');
xmlfile.write('<Root></Root>');
xmlfile.close();
}
xmlfile.open('r');
xmlcontent = xmlfile.read();
xmlfile.close();
//$.writeln(xmlcontent);
var xml = new XML(xmlcontent);
// here the problems start
// the check is only working for known elements
var child = new XML('<name data="bob"></name>');
if (xml.contains(child)) {
child.#data = 'jim';
$.writeln('A child called "name" exists. Update');
xml.replace('name', child);
} else {
$.writeln('no child called "name" exists. Append');
child.#data = 'bob';
xml.appendChild(child);
}
xmlfile.open('w');
xmlfile.write(xml.toXMLString());
xmlfile.close();
My real answer is:
Use JSON instead.

Can bind $scope but can't access array unless add Alert()

I am using the SharePoint JavaScript Object Model within an Angular controller to retrieve data from the Taxonomy (term store). By using $scope.apply, I am able to bind the array to scope and use the values in a dropdown since SharePoint's JavaScript Object Model is not a normal Angular function understood by scope. This works as intended.
Now I need to set the value of the field to the current value stored in the database. This works with the following for dropdown/choice based fields where I retrieve the index of the item via a search of the array. Example:
var currentCategoryIndex = $scope.categoryValues.map(function (e) { return e.value; }).indexOf(currentCategoryValue);
$scope.vm.selectedCategory = $scope.categoryValues[currentCategoryIndex];
However, I can't access my array within the controller to check for the index (see code below). It does, however, bind the $scope for use in the dropdown via the $scope.$apply.
Something else really odd is if I add an alert, it will start working, like it somehow forces scope back. But using an alert on page load every time just to get the array working is not realistic.
I need to access the array so I can compare against it and get the index so I can set the field value to the correct item currently stored in the database.
Here is the function in my controller. Note that I need to run a sub function to get all the values. This works to create the $scope.termsArray binding that I use in my dropdown, it is the setting of $scope.vm.selectedCategory where the issue is occurring:
var termsArray = [];
// Query Term Store and get terms for use in Managed Metadata picker stored in an array named "termsArray".
function execOperation() {
// Current Context
var context = SP.ClientContext.get_current();
// Current Taxonomy Session
var taxSession = SP.Taxonomy.TaxonomySession.getTaxonomySession(context);
// Term Stores
var termStores = taxSession.get_termStores();
// Name of the Term Store from which to get the Terms. Note, that if you receive the following error "Specified argument was out of the range of valid values. Parameter name: index", you may need to check the term store name under Term Store Management to ensure it was not changed by Microsoft
var termStore = termStores.getByName("Taxonomy1234");
// GUID of Term Set from which to get the Terms
var termSet = termStore.getTermSet("1234");
var terms = termSet.getAllTerms();
context.load(terms);
context.executeQueryAsync(function () {
var termEnumerator = terms.getEnumerator();
while (termEnumerator.moveNext()) {
var currentTerm = termEnumerator.get_current();
var guid = currentTerm.get_id();
var guidString = guid.toString();
var termLabel = currentTerm.get_name();
// Get labels (synonyms) for each term and push values to array
getLabels(guid, guidString, termLabel);
}
// Set $scope to terms array
$scope.$apply(function () {
$scope.termsArray = termsArray;
console.log($scope.termsArray); // DOES NOT LOG ARRAY
});
var currentFacilityIndex = termsArray.map(function (e) { return e.termGUID; }).indexOf(currentFacilityGUID);
console.log(currentFacilityIndex);
$scope.term.selected = termsArray[currentFacilityIndex];
}, function (sender, args) {
console.log(args.get_message());
});
// Get labels (synonyms) for each term and push values to array
function getLabels(termguid, guidString, termLabel) {
var clientContext = SP.ClientContext.get_current();
var taxSession = SP.Taxonomy.TaxonomySession.getTaxonomySession(clientContext);
var termStores = taxSession.get_termStores();
// The name of the term store. Note, that if you receive the following error "Specified argument was out of the range of valid values. Parameter name: index", you may need to check the term store name under Term Store Management to ensure it was not changed by Microsoft
var termStore = termStores.getByName("Taxonomy1234");
// GUID of Term Set from which to get the Terms
var termSet = termStore.getTermSet("1234");
var term = termSet.getTerm(termguid);
var labelColl = term.getAllLabels(1033);
clientContext.load(labelColl);
clientContext.executeQueryAsync(function () {
var labelEnumerator = labelColl.getEnumerator();
var synonyms = "";
while (labelEnumerator.moveNext()) {
var label = labelEnumerator.get_current();
var value = label.get_value();
synonyms += value + " | ";
}
termsArray.push({
termName: termLabel,
termGUID: guidString,
termSynonyms: synonyms
});
}, function (sender, args) {
console.log(args.get_message());
});
}
};
// Execute function
execOperation();
UPDATE: I tried setting the $scope.termsArray = []; per the suggestion below, but it didn't work. What is really odd is that if I have an alert as follows, it somehow forces the console to log/grants me access to the array in the controller.
$scope.$apply(function () {
$scope.termsArray = termsArray;
alert("hey");
console.log($scope.termsArray);
});

I found a bit hard to follow your code.
My first guess would be to instantiate the array with empty value before anything else.
$scope.termsArray = [];
This trick tells Angular that this property exists and will exist at later stage.