How to filter following JSON with ionic filter bar - angularjs

Question

Using Ionic Filter Bar for implementing search in ionic app, I need to to search on "parent_type" and "child_type" from following json,
{
"status": {
"code": 200,
"message": "all data grabbed successfully",
"cause": ""
},
"ParentData": [
{
"id": 67,
"parent_type": "Parent Type",
"child": [
{
"id": 86,
"child_type": "Child Type"
},
{
"id": 93,
"child_type": "Child Type1"
}
]
},
{
"id": 68,
"parent_type": "Parent Type 1",
"child": [
{
"id": 87,
"child_type": "Child Type 1"
},
{
"id": 94,
"child_type": "Child Type 2"
}
]
}
]
}
its working fine for "parent_type" with following code
Here is the filter code
$scope.showFilterBar = function () {
filterBarInstance = $ionicFilterBar.show({
//setting parentData in following way after rest service call
//$scope.parentData = jsondata.ParentData
items: $scope.parentData,
update: function (filteredItems, filterText) {
$scope.parentData = filteredItems;
if (filterText) {
console.log(filterText);
}
},
filterProperties: ['parent_type']
});
};
But not able to search on "child_type"
So is there any way to set filterProperties so it will work for both "parent_type" and "child_type" or any other way to search this Json?
Thanks.

Answer 1

You should remove the "filterProperties" key and then add "expression" key.
Your "filterBarInstance" will be something like this:
$scope.showFilterBar = function () {
filterBarInstance = $ionicFilterBar.show({
items: $scope.parentData,
update: function (filteredItems, filterText) {
$scope.parentData = filteredItems;
if (filterText) {
console.log(filterText);
}
},
expression: function(filterText,value,index,array){
// This function is called for every ParentData object.
// "value" will be the current ParentData object,
// you'll need to iterate over all the "child" array in order to
// check if any of the "child_type" keys contains the "filterText"
// so if "parent_type" contains the "filterText" and any(? or all)
// of the the "child[x].child_type" values also contains the
// "filterText" return true
}
});
};
Check https://github.com/djett41/ionic-filter-bar for the original documentation.
Sorry for my english :)