Question

我很难获取班级部分的所有在读学生

我正在尝试使用ajax获取每节的学生人数，以确定是否达到了学生人数，或者我们可以像上图那样调整座位数。

这是我的JavaScript

<script type="text/javascript">
  $(document).ready(function () {
    var section_id_post = '<?php echo $student['section_id']; ?>';
    var class_id_post = '<?php echo $student['class_id']; ?>';
    populateSection(section_id_post, class_id_post);
    function populateSection(section_id_post, class_id_post) {
        $('#section_id').html("");
        var base_url = '<?php echo base_url() ?>';
        var div_data = '<option value=""><?php echo $this->lang->line('select'); ?></option>';
        $.ajax({
            type: "GET",
            url: base_url + "sections/getByClass",
            data: {'class_id': class_id_post},
            dataType: "json",
            success: function (data) {
                $.each(data, function (i, obj)
                {
                    var select = "";
                    if (section_id_post == obj.section_id) {
                        var select = "selected=selected";
                    }
                    div_data += "<option value=" + obj.section_id + " " + select + ">" + obj.section + "</option>";
                });

                $('#section_id').append(div_data);
            }
        });
    }

    $(document).on('change', '#class_id', function (e) {
        $('#section_id').html("");
        var class_id = $(this).val();
        var base_url = '<?php echo base_url() ?>';
        var div_data = '<option value=""><?php echo $this->lang->line('select'); ?></option>';
        $.ajax({
            type: "GET",
            url: base_url + "sections/getByClass",
            data: {'class_id': class_id},
            dataType: "json",
            success: function (data) {
                $.each(data, function (i, obj)
                {   
                    div_data += "<option value=" + obj.section_id + ">" + obj.section + "</option>";
                });
                $('#section_id').append(div_data);
            }
        });
    });



    var date_format = '<?php echo $result = strtr($this->customlib->getSchoolDateFormat(), ['d' => 'dd', 'm' => 'mm', 'Y' => 'yyyy',]) ?>';
    $('#dob,#admission_date').datepicker({
        format: date_format,
        autoclose: true
    });
});

这是我的观点

<div class="col-md-3">
  <div class="form-group">
    <label>Select Section</label>
      <select  id="section_id" name="section_id" class="form-control" >
         <option value="">Select</option>
      </select>
  </div>
</div>
<div class="col-md-2">
  <div class="form-group"><label>Number of Students</label>
       <input id="noStd" name="noStd" class="form-control" readonly="readonly"/>
  </div>
</div>

我的控制

function numberOfStd() {
   $section_id = $this->section_model->get('section_id');
    foreach ($section_id as $key => $value) {
        if ($value["id"] != 0) {
            $count_student[$value["section"]] = $this->studentsession_model->countStudentBySessionBySection($value["id"]);
        }
    }
    $data["count_student_section"] = $count_student;
}

我的模特

 public function countStudentBySessionBySection($id){
    $query = $this->db->select("*")->join("students", "students.id = student_session.student_id")->where("student_session.section_id", $id)->get("student_session");
    return $query->num_rows();
}

在ajax和codeigniter activer记录的文本框中按组显示计数

0 个答案: