query object where function filter - mobile

Question

I am trying to implement my business logic in the Azure layer and I just do not grasp this node.js style of scripts on Insert.
I have T-SQL that works for this
declare #latitude decimal(23,20)
declare #longitude decimal(23,20)
declare #timeStamp datetime
set #latitude = 37.7858340000000012537
set #longitude = -122.4064170000000046911
set #timeStamp = '2012-12-25 02:58:23'
select longitude, latitude, userid
from blah.actions ba
where
(
datediff(second, ba.TimeStamp, #timeStamp) < 5 and
(ba.longitude - 0.0001 <= #longitude and ba.longitude + 0.0001 >= #longitude) and
(ba.latitude - 0.0001 <= latitude and ba.latitude + 0.0001 >= latitude)
)
The question is, how do I use a function to filter the table query within an Azure script on Insert?
So a little more work. I figured out how to filter with a function (but I am still struggling with how to debug the Azure scripts). I have the following on my Insert. I have it "working",in the fact that I no longer receive "Internal Server Error", but I have no idea how to log the results or view them (any tips on this Azure stuff are greatly appreciated). I am starting to realize just how much more work I have to do on this application.
function dateDiff(date1, date2)
{
return date1.getTime() - date2.getTime() / 1000;
}
function insert(item, user, request) {
request.execute();
var actionsTable = tables.getTable('BlahActions');
actionsTable.where(function(currentLat, currentLon, currentTime)
{
return (this.Latitude - 0.0001 <= currentLat && this.Latitude + 0.0001 >= currentLat) &&
(this.Longitude - 0.0001 <= currentLon && this.Longitude + 0.0001 >= currentLon) &&
(this.TimeStamp == currentTime);
//(dateDiff(this.TimeStamp, currentTime) <= 5);
}, item.Latitude, item.Longitude, item.TimeStamp)
.read(
{
success:function(results)
{
}
});
}
The problem with the above script is Azure pukes when using the getTime(). I need to grab all of the entries that are close to the same latitude and longitude and that have occurred within the past X seconds (yes, essentially reinventing the "bump"). This is where I am currently stuck. I will update when/if I make it passed this part.

Answer 1

A few lessons learned here.
First and foremost, the Log files are viewable with the menu at the top of the root of the mobile service where it says "LOGS"...#epicFacePalm.
Second, now that I can see the actual error message and not something generic from within my XCode IDE
The return statement inside the predicate for the where method must do simple comparisons only -- you cannot make a call to another method and check the return value in your conditional statements -- that puked on me.
The other technical detail was to change my TimeStamp column from DateTime to double -- completely simplifies the subtraction of the time stamps with no conversions necessary -- simple
With that said, I now have this in the where method
actionsTable.where(function(currentLat, currentLon, currentTime)
{
return (this.Latitude - 0.0001 <= currentLat && this.Latitude + 0.0001 >= currentLat) &&
(this.Longitude - 0.0001 <= currentLon && this.Longitude + 0.0001 >= currentLon) &&
(currentTime - this.TimeStamp <= 5);
}, item.Latitude, item.Longitude, item.TimeStamp)
to filter the results before I filter them in the success callback
.read(
{
success:function(results)
{
for (var i = 0; i < results.length; i++)
{
var obj = results[i];
for(var key in obj)
{
if (key === "id" &&
distance(obj.Longitude, obj.Latitude, item.Longitude, item.Latitude) < 30)
{
}
}
}
}
}
The whole thing for syntax clarity
function insert(item, user, request) {
request.execute();
var actionsTable = tables.getTable('blahActions');
console.log("Inserting new action '%j'", item);
actionsTable.where(function(currentLat, currentLon, currentTime)
{
return (this.Latitude - 0.0001 <= currentLat && this.Latitude + 0.0001 >= currentLat) &&
(this.Longitude - 0.0001 <= currentLon && this.Longitude + 0.0001 >= currentLon) &&
(currentTime - this.TimeStamp <= 5);
}, item.Latitude, item.Longitude, item.TimeStamp)
.read(
{
success:function(results)
{
for (var i = 0; i < results.length; i++)
{
var obj = results[i];
for(var key in obj)
{
if (key === "id" &&
distance(obj.Longitude, obj.Latitude, item.Longitude, item.Latitude) < 30)
{
}
}
}
}
});
}