Global variables

[Pushpendra Kumar]

Hello All,

      

                 I want to have some global variables those will be initialized on login.

                 And then I will use these variables in whole application.

                 Please suggest e an idea to have global variables and constants.

Thanks,

Pushpendra 

[Raul Vieira]

To have variables visible throughout your ng application I would consider adding them to the root scope.  If these vars need to visible outside of ng then you'll need to add them to the window (hopefully in a namespace you've created).

Raul

Sent from my iPad

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[Bernhard Rode]

I'd recommend to implement services to hold your shared data and deal with the communications etc. 

You may also bind those services to your rootScope in the applications run method.

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[Alesei N]

You can use

.value('config',{});

Then inject it in your main controller, where you could expose this config through $rootScope.

Let me know if you need more configuration.

[Jeff Hubbard]

This is what I would recommend as well. Injection is awesome, and you should use as much of it as you need--rather than polluting scopes or having a "configuration holding" service.

[Raul Vieira]

My understanding was that the config block runs during app bootstrapping.  I read the requirement to indicate on login.  If login is part of the same app then how will this work?

Sent from my iPhone

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[Martin Alix]

Angular does not have a concept of login, that is something you have to implement yourself...

.value('config',{}) will be set as soon as the application starts and available anywhere it is injected.
It just happens to be named config in this example, it could be named anything, for example .value('foo',{bar:'baz'})

[Raul Vieira]

Yes I get that login is not core. My point was regarding the requirement of a login interaction. What was described was setting globals in this interaction. This implies after app bootstrapping. How can you use config in this scenario?

I agree that using a value makes sense, but not in the use case described. Did I misunderstand the request?

Raul

Sent from my iPhone

[Alesei N]

You can write to so called "config" after you injected it.

Initial post asks how to set global variables, this is one way to do this, as this will be available through out app any where you inject it.

you could also approach this through.

app.run(function ($rootScope) {
    $rootScope.someData = {message: "hello"};
});

[Pushpendra Kumar]

Thanks a lot guys.

What about the use of app.costant("myVars", {"a":12, "b":2});

I want that once my first call goes to back end and fetch response, I want to keep this response in whole app.

Pushpendra 

[Alesei N]

That works too, if you are planning to only read it. You could use run block to execute some logic, and assign constant.

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