Finding the Size of a Model in Google App Maker - datasource

Question

Ive been trying to figure out how Google App Maker works with models by trying to write a simple button to return the length(number of records) that exists within a model I've created and loaded temporary data into (which should have about 150 records).
I'm working with a model called Generic Logs that has ten different
app.models.GenericLogs.fields._values.length - Returns 10
alert(app.models.GenericLogs.fields.Id.maxValue) - Returns null
alert(app.models._values.length) - Returns 2 (I have a second model)
alert(app.models.GenericLogs.datasources._values.length) - Returns 1
I definitely want to get the 150+ response for all of the records (non-unique)

Answer 1

Option 1:
Set your datasource limit setting to 0 and do console.log(app.datasources.YourDatasource.items.length). The downside to this is that all records will be returned to the client and might slow down your UI.
Option 2:
Create a server function -
function YourFunction() {
var query = app.models.YourModel.newQuery();
query.limit = 0;
var results = query.run();
return results.length;
}
Create a button in your client and attach the following to the onClick event google.script.run.withSuccessHandler(function (serverresult) {console.log(serverresult)}).YourFunction()
Reference: https://developers.google.com/appmaker/scripting/server#querying_records