Update model using associative form array

maybe something like this:

foreach ($collection as $element_id => $element_data){
    $myElement = MyModel::find($element_id);
    $myElement->fill($element_data);
    $myElement->save();
}

Edit: also I think you would need to be sure your attributes are part of the fillable attributes of your model by adding

protected $fillable = ['activity', 'location', 'time', 'duration', 'days'];

to your model.

Thanks @Gog0 - is the best way to get the 'collection' from the form using;

$collection = array_except(Input::all(), '_method');

or should I be using something else?

You can use request->all(); as well

Use the update() method for Eloquent.

@integreatmedia don't really know how your form is done here but your inputs should come as an array by using the same name attribute, for example name="mycollectionname[1001][activity].

You would then just use

$collection = $request->input('mycollectionname');

I prefer using dependency injection by adding Request $request to the controller method parameters and use Illuminate\Http\Request; to the controller instead of using the Input Facade, as suggested by @balistikbill

Also you could use update() as suggested by @ejdelmonico

foreach ($collection as $element_id => $element_data){
    MyModel::where('id', $element_id)
                  ->update($element_data);
}

Sounds actually more relevant as you don't really need to retrieve your entity before updating it. Just keep in mind that if you make use of saved and updated events on your model they would not be fired that way.