I am trying to find a proper solution for some protected employee userData that I want extend with additional entries/data for easy access
Here's a rough example of what I'm trying to do:
This works, but I dont like that I have to put all the custom logic inside the index function
setmetatable(self, {
__index = function(t,k)
if k == "isDriving" then --custom data
return user.inCar and user.onRoad
elseif k == "isLateToWork" then --custom data
return user.wokeUpLate and user.startTime < user.arrivalTime
else
return user[k] --original userData
end
end
})
and how I access the custom data:
print(employee.isDriving)
Ideally I would want to put the custom logic in a separate function, like the example below:
This doesnt work, can also not pass an argument (returns nil)...
if k == "isDriving" then --custom data
return self:IsDriving(t) --t holds carData and roadData
How can I solve this problem? Are there better solutions?
self:IsDriving(t) is sugar for self.IsDriving(self,t).
So, the first time the index metamethod is called with k equal to IsDriving, create a function that does what you want, rawset it to IsDriving, and return it.
However, it's simply easier to create a plain method called IsDriving in the first place.