我想从第1学期到第2学期推广一批学生。
---------------控制器--------------------
npm install -g @angular/cli@latest
-------------------模型---------------------
public function display_promote_student()
{
if (isset($_SESSION['logged_in']) && $_SESSION['logged_in'] === true && $_SESSION['role'] === '1' && $_SESSION['role_des'] === 'admin')
{
$data['batch']=$this->Student_model->get_all_batch();
$data['course']=$this->Student_model->get_all_course();
$data['sem']=$this->Student_model->get_all_sem();
if($data)
{
$this->load->view('Admin/header');
$this->load->view('Admin/promote_students', $data);
}
else
{
redirect('Admin/index','refresh');
}
}
else
{
redirect('Admin/index');
}
}
public function list_promote_student_view()
{
if (isset($_SESSION['logged_in']) && $_SESSION['logged_in'] === true && $_SESSION['role'] === '1' && $_SESSION['role_des'] === 'admin')
{
$course=$this->input->post('course');
$sem=$this->input->post('sem');
$batch=$this->input->post('batch');
$data['course']=$course;
$data['sem']=$sem;
$data['batch']=$batch;
$data['promote'] = $this->Student_model->get_all_student_by_cour_sem($course,$sem,$batch);
$this->load->view('Admin/header');
$this->load->view('Admin/list_promote_students',$data);
}
}
public function promote_semester_processing()
{
if (isset($_SESSION['logged_in']) && $_SESSION['logged_in'] === true && $_SESSION['role'] === '1' && $_SESSION['role_des'] === 'admin')
{
$course=$this->input->post('course');
$sem=$this->input->post('sem');
$batch=$this->input->post('batch');
$new_sem=$this->input->post('newsem');
$results = $this->Student_model->get_all_student_by_cour_sem($course,$sem,$batch);
$dep_id = [$results];
//var_dump( $dep_id);die();
$prodate = date('Y-m-d');
$month = strtotime($prodate);
$promonth = date('m',$month);
foreach($results as $val)
{
$dep_id = $val['student_id'];
$db_date = $val['promote_date'];
$db_month = strtotime($db_date);
$pro_month = date('m',$db_month);
$cal = $pro_month +5;
$data = array(
'sem_id' =>$new_sem,
'promote_date' =>$prodate);
if($db_date == 0)
{
$id=$this->Student_model->update_semester($dep_id,$data);
if($id)
{
$this->session->set_flashdata('msg','<div class="alert alert-success text-center">Promote Semester Successfully... </div>');
redirect('Admin/display_promote_student');
}
else
{
$this->session->set_flashdata('msg','<div class="alert alert-success text-center">Promote Semester not Successfully... </div>');
redirect('Admin/display_promote_student');
}
}
elseif ($promonth == $cal)
{
$id=$this->Student_model->update_semester($dep_id,$data);
}
else
{
$this->session->set_flashdata('msg','<div class="alert alert-success text-center">You can promote only after six months... </div>');
redirect('Admin/display_promote_student');
}
}
}
}
-------------------------视图--------------------- ---
promote_student
public function get_all_student_by_cour_sem($course,$sem,$batch)
{
$this->db->select( 'tbl_student.*, tbl_course.*,tbl_semester.*,tbl_batch.*');
$this->db->from('tbl_student');
$this->db->join('tbl_course','tbl_course.course_id = tbl_student.course_id','left');
$this->db->join('tbl_semester', 'tbl_semester.sem_id = tbl_student.sem_id','left');
$this->db->join('tbl_batch', 'tbl_batch.batch_id = tbl_student.stud_batch_id','left');
$this->db->where('tbl_student.course_id',$course);
$this->db->where('tbl_student.sem_id',$sem);
$this->db->where('tbl_student.stud_batch_id',$batch);
$query = $this->db->get();
return $query->result_array();
}
public function update_semester($dep_id,$data)
{
$this->db->where('student_id',$dep_id);
return $query = $this->db->update('tbl_student',$data);
}
List_promote_students
<div class="container">
<div class="col-md-10 col-md-offset-1">
<h4><?php echo $this->session->flashdata('msg'); ?></h4><br>
<div class="panel panel-default">
<div class="panel-heading">
<h3>Promote Students</h3>
</div>
<?php $attributes = array("name" => "promote", "class" => "form-horizontal");
echo form_open_multipart("Admin/list_promote_student_view", $attributes);?>
<div class="panel-body">
<div class="form-group has-feedback">
<label for="title" class="col-sm-2 control-label">Course</label>
<div class="col-sm-6">
<select class="form-control" name="course" required>
<option>--Choose a Course--</option>
<?php
foreach($course as $row)
{
echo '<option value="'.$row->course_id.'">'.$row->c_name.'</option>';
}?>
</select>
<span class="text-danger"><?php echo form_error('course'); ?></span>
</div>
</div>
<div class="form-group has-feedback">
<label for="semester" class="col-sm-2 control-label" placeholder="">Semester</label>
<div class="col-sm-6">
<select class="form-control" name="sem" required>
<option>--Choose a Semester--</option>
<?php
foreach($sem as $row)
{
echo '<option value="'.$row->sem_id.'">'.$row->sem_code.'</option>';
}?>
</select>
<span class="text-danger"><?php echo form_error('semester'); ?></span>
</div>
</div>
<div class="form-group has-feedback">
<label for="title" class="col-sm-2 control-label">Year</label>
<div class="col-sm-6">
<select class="form-control" name="batch" required>
<option>--Choose Batch--</option>
<?php
foreach($batch as $row)
{
echo '<option value="'.$row->batch_id.'">'.$row->batch_year.'</option>';
}?>
</select>
</div>
<span class="text-danger"><?php echo form_error('year'); ?></span>
</div>
</div>
<div class="box-footer col-md-offset-4">
<button type="submit" class="btn btn-warning">Submit</button>
</div>
<?php echo form_close(); ?>
</div>
</div>
</div>
只有一名学生获得此代码的晋升机会。但我想在下学期推广一批学生。我该怎么做？
请尽早帮助我。
答案 0 :(得分：0)
目前您正在使用循环逐个更新学生，但您应该在模型的 update_semester（$ dep_id）中使用codeigniter的 update_batch 功能，$ data）功能。您还必须在$ data参数中传递所有学生数据。
Codeigniter update_batch function link
您的代码中的问题： - 问题出在您的控制器的 promote_semester_processing（）功能中。在 foreach循环中，只要第一个用户的学期成功更新，您就可以使用重定向（＆＃39; Admin / display_promote_student＆＃39;）; 设置Flash数据 $ this-＆gt; session-＆gt; set_flashdata（＆＃39; msg＆＃39;，＆＃39;促进学期成功......＆＃39;）; ，刷新页面，因此下一个更新查询将永远不会执行。
在您发表评论后更新了promote_semester_processing（）函数
public function promote_semester_processing()
{
if (isset($_SESSION['logged_in']) && $_SESSION['logged_in'] === true && $_SESSION['role'] === '1' && $_SESSION['role_des'] === 'admin')
{
$course=$this->input->post('course');
$sem=$this->input->post('sem');
$batch=$this->input->post('batch');
$new_sem=$this->input->post('newsem');
$results = $this->Student_model->get_all_student_by_cour_sem($course,$sem,$batch);
$dep_id = [$results];
//var_dump( $dep_id);die();
$prodate = date('Y-m-d');
$month = strtotime($prodate);
$promonth = date('m',$month);
$response_array = array(); // Declare an empty array to store all responses
foreach($results as $val)
{
$dep_id = $val['student_id'];
$db_date = $val['promote_date'];
$db_month = strtotime($db_date);
$pro_month = date('m',$db_month);
$cal = $pro_month +5;
$data = array(
'sem_id' =>$new_sem,
'promote_date' =>$prodate
);
if($db_date == 0)
{
$id=$this->Student_model->update_semester($dep_id,$data);
if($id)
{
//$this->session->set_flashdata('msg','<div class="alert alert-success text-center">Promote Semester Successfully... </div>');
//redirect('Admin/display_promote_student');
$response_array[] = array(
'student_id' => $dep_id, // you can use anything here according to your requirement
'msg' => '<div class="alert alert-success text-center">Promote Semester Successfully... </div>'
);
}
else
{
//$this->session->set_flashdata('msg','<div class="alert alert-success text-center">Promote Semester not Successfully... </div>');
//redirect('Admin/display_promote_student');
$response_array[] = array(
'student_id' => $dep_id, // you can use anything here according to your requirement
'msg' => '<div class="alert alert-success text-center">Promote Semester not Successfully... </div>'
);
}
}
elseif ($promonth == $cal)
{
$id=$this->Student_model->update_semester($dep_id,$data);
}
else
{
//$this->session->set_flashdata('msg','<div class="alert alert-success text-center">You can promote only after six months... </div>');
//redirect('Admin/display_promote_student');
$response_array[] = array(
'student_id' => $dep_id, // you can use anything here according to your requirement
'msg' => '<div class="alert alert-success text-center">You can promote only after six months... </div>'
);
}
}
$this->session->set_flashdata('msg', $response_array);
redirect('Admin/display_promote_student');
}
}
由于我使用了一个数组用于flashdata，所以你必须相应地更改重定向页面上的代码。
一些指导
1-您应该使用codeigniter form_validation库。
2-每当要更新数据库中的多行时，请使用update_batch函数。