Weather.getCurrentConditions().attribute crashes when data is not available SDK 3.2.1

Hi Jim,

What you're doing there is similar to my workaround, although I am not following your use of makeTemp.

Here's my full function:

	static function getTemperature() {
		
		var value;		
		var degreeSign = StringUtil.utf8ArrayToString([0xC2,0xB0]);
		var units = degreeSign + Ui.loadResource(Rez.Strings.degC);
		var unitsNum = Sys.getDeviceSettings().temperatureUnits;
		
		if (Weather.getCurrentConditions() == null) {
			value = "-- ";
			
			if (unitsNum == 1) {
				units = degreeSign + Ui.loadResource(Rez.Strings.degF);
			}
		}
		else {
			value = Weather.getCurrentConditions().temperature;  // units are degC

			if (unitsNum == 1) {
				value = ((value * (9.0d / 5.0d)) + 32).toNumber();
				units = degreeSign + Ui.loadResource(Rez.Strings.degF);
			}
		}
		
		var reading = value + units;
		
		return reading;
	}

The app crashes when I try this:

if (Weather.getCurrentConditions().temperature == null) {

// do something

}

I'm relatively new at coding and Connect IQ. Is this behavior normal for attributes?

Hi Jim,

What you're doing there is similar to my workaround, although I am not following your use of makeTemp.

Here's my full function:

	static function getTemperature() {
		
		var value;		
		var degreeSign = StringUtil.utf8ArrayToString([0xC2,0xB0]);
		var units = degreeSign + Ui.loadResource(Rez.Strings.degC);
		var unitsNum = Sys.getDeviceSettings().temperatureUnits;
		
		if (Weather.getCurrentConditions() == null) {
			value = "-- ";
			
			if (unitsNum == 1) {
				units = degreeSign + Ui.loadResource(Rez.Strings.degF);
			}
		}
		else {
			value = Weather.getCurrentConditions().temperature;  // units are degC

			if (unitsNum == 1) {
				value = ((value * (9.0d / 5.0d)) + 32).toNumber();
				units = degreeSign + Ui.loadResource(Rez.Strings.degF);
			}
		}
		
		var reading = value + units;
		
		return reading;
	}

The app crashes when I try this:

if (Weather.getCurrentConditions().temperature == null) {

// do something

}

I'm relatively new at coding and Connect IQ. Is this behavior normal for attributes?

"although I am not following your use of makeTemp."

makeTemp is just a helper function that does things like C to F conversion. 

Hi Jim,

Thanks for the tip. I have this function in a separate Util.mc file, but in this case the strings are so simple I can just use "C" and "F" instead of calling resources.

Since temperature is the only thing I need, at first I did not even think about using the broader function Weather.getCurrentConditions() by itself. But after reading the API and seeing that it should return null, I decided to try it.

This is the error I get in the console:

Error: Unexpected Type Error
Details: Failed invoking <symbol>
Stack:
- getTemperature() at C:\...\source\Util.mc:211 0x1000071d

- ...

- ...

After I this code: 

The line reference is the same line as the if statement.

Just a general comment, but some of the stuff you're doing each time the function is called can just be done once when the app starts. No need to do the loadResource each time for example.  That's something that hits the file system, so can be expensive.

"temp" in my code is just short for temperature.  It's the sting I'll be displaying.

You shouldn't need to null check Weather.getCurrentConditions().temperature

What is the error you see, and which line is referenced?