Updating input values filled out by ng-repeat | Angular js - angularjs

Question

I have to update the value of multiple Inputs using ng-repeat. i usually get the value with JQuery $(class/id).val() and get its value. but now i have no idea how to access the input values since i only have one id for each. (i have like 20 input in the table)
View:
<tr ng-repeat="i in list">
<td><input list="itemNames" class="item_name" ng-model="i.item_name" value="{{i.item_name}}" type="text"/></td>
<datalist id="itemNames">
<option ng-repeat="ii in list" class="idI" ng-model="ii.idI" data-item="{{ii.idI}}" value="{{ii.item_name}} {{ii.idI}}">
</datalist>
<td><input class="quantity" ng-model="i.quantity" value="{{i.quantity}}" type="number"/></td>
<td><input class="price" ng-model="i.price" value="{{i.price}}" type="number"/></td>
<tr>
<td ng-click="updateAll()">UPDATE</td>
</tr>
</tr>
I expect to store all values in an arrays, but what i got is only values of the first row.
JS:
$scope.updateAll=function(){
// getting vallues
var item_name=$(".item_name").val();
var quantity=$(".quantity").val();
var price=$(".price").val();
}

Answer 1

I think your list is a scope variable. So, in controller its defined as $scope.list. You need not to think about id as you are using angular code, angular framework will do it for you.
As you used the two way data binding with ng-model, so any change to the bind variable will be immediately visible to controller and html view.
The use of ng-model ensures the immediate update to the $scope.list variable.
For example, if you add any text for "item_name" in the control index 0 from html view, the variable $scope.list[0].item_name will be automatically updated, also the change in $scope.list[0].item_name = "Some name" in controller will be automatically reflected in the view.
So, your given code can be re-written as following:
<tr ng-repeat="i in list">
<td><input list="itemNames_{{$index}}" class="item_name" id="txt_name_{{$index}}" ng-model="selectedValue" ng-change = "getSelectedId(selectedValue, $index)" type="text"/></td>
<datalist id="itemNames_{{$index}}">
<option ng-repeat="ii in list" class="idI" ng-model="ii.idI" data-item="{{ii.idI}}" value="{{ii.item_name}} {{ii.idI}}">
</datalist>
<td><input class="quantity" ng-model="i.quantity" value="{{i.quantity}}" type="number"/></td>
<td><input class="price" ng-model="i.price" value="{{i.price}}" type="number"/></td>
<tr>
<td ng-click="updateAll()">UPDATE</td>
</tr>
The javascript method can be written as:
var getSelectedId = function(selectedValue, index) {
var val = document.getElementById('txt_name_' + index).value;
var text = $('#itemNames_' + index).find('option[value="' + val + '"]').attr('data-item');
alert(text);
}