无法使用angular.js从表中过滤某些值

Question

i am using some Roman value(i.e-I,II,III,......VIII) in my table but when trying to filter table using these value for some value the filtration process is happening and for some value its not happening using angular.js. Please check my code below.

subject.html:

<table class="table table-bordered table-striped table-hover" id="dataTable" >
<colgroup>
<col class="col-md-1 col-sm-1">
<col class="col-md-2 col-sm-2">
<col class="col-md-2 col-sm-2">
<col class="col-md-2 col-sm-2">
<col class="col-md-2 col-sm-2">
<col class="col-md-2 col-sm-2">
<col class="col-md-1 col-sm-1">
</colgroup>
<thead>
<tr>
<th>Sl. No</th>
<th>
<select style="width:100%; border:none; font-weight:bold;" ng-options="sub.name for sub in noCourse track by sub.value" ng-model="search" ng-change="selectedCourseTable();" >
<!-- <option value="">Course Name</option>-->
</select>
</th>
<th>
<select style="width:100%; border:none; font-weight:bold;" ng-options="sem.name for sem in noSemestersTable track by sem.value" ng-model="semesterSearch">
<option value="">Semester</option>
</select>
</th>
<th>Subject Name</th>
<th>Short Name</th>
<th>Edit</th>
</tr>
</thead>

<tbody id="detailsstockid">
<tr ng-repeat="sub in subjectData | filter:{course_name:search.value, semester:semesterSearch.value }" >
<td>{{ $index+1 }}</td>
<td>{{sub.course_name}}</td>
<td>{{sub.semester}}</td>
<td>{{sub.subject_name}}</td>
<td >{{sub.short_name}}</td>
<td>
<a href='#subject?s_i={{sub.subject_id}}'>
<input type='button' class='btn btn-xs btn-green' value='Edit'>  
</a>
</td>
</tr>   
</tbody>
</table>

For bind the data dynamically in table i have some db operation and inside the database the Roman values are also stored.Check my controller file.

subjectController.js:

$http({
        method: 'GET',
        url: "php/subject/readCourse.php",
    }).then(function successCallback(response) {
        angular.forEach(response.data, function(obj){
            var Course={'name':obj.course_name , 'value':obj.course_name};
            $scope.noCourse.push(Course);
        });
    },function errorCallback(response) {

    });
$scope.selectedCourseTable=function(){
        if($scope.search.value=='Bachelor of Technology'){
            $scope.noSemestersTable=[
            {name:"I",value: "I"},
            {name:"II",value:"II"},
            {name:"III",value: "III"},
            {name:"IV",value: "IV"},
            {name:"V",value:"V"},
            {name:"VI",value: "VI"},
            {name:"VII",value:"VII"},
            {name:"VIII",value:"VIII"}
            ];
        }
        if($scope.search.value=='Master in Technology'){
            $scope.noSemestersTable=[
            {name:"I",value: "I"},
            {name:"II",value: "II"},
            {name:"III",value:"III"},
            {name:"IV",value:"IV"}
            ];
        }
        if($scope.search.value=='Master of computer application'){
            $scope.noSemestersTable=[
            {name:"I",value:"I"},
            {name:"II",value: "II"},
            {name:"III",value:"III"},
            {name:"IV",value:"IV"},
            {name:"V",value:"V"},
            {name:"VI",value:"VI"}
            ];
        }
        if($scope.search.value==''){
            $scope.noSemestersTable=null;
        }
    }

When i am selecting the value III onward the filtering is occurring properly but when i am selecting I or II from drop down its not happening ,all values are showing.Actually i am confused about this issue for some value filter is working properly but for some value not working.Please help me to resolve this issue.

Answer 1

I think it is the way how filter works. The match in the way you are using it right now is not strict. I think you should use sub in subjectData | filter:{course_name:search.value, semester:semesterSearch.value }:true.

Notice the true value at the end of the filter - this makes the comparison to be strict.