A Database Error Occurred In codeigniter Error Number: 1048 - php

Question

i have problem at the time of input data to the database
this is error message
A Database Error Occurred
Error Number: 1048
Column 'username_member' cannot be null
INSERT INTO member (id_member, username_member,
password_member, nama_member, jk_member, hp_member,
alamat_member, email_member) VALUES (NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL)
Filename: C:/AppServ/www/PROJEK/system/database/DB_driver.php
Line Number: 691
my controller
function tambah()
{
$data = array(
'aksi' => site_url('member/tambah_aksi'),
'id_member' => set_value('id_member'),
'username_member' => set_value('username_member'),
'password_member' => set_value('password_member'),
'nama_member' => set_value('nama_member'),
'jk_member' => set_value('jk_member'),
'hp_member' => set_value('hp_member'),
'alamat_member' => set_value('alamat_member'),
'email_member' => set_value('email_member'),
'button' => 'DAFTAR'
);
$this->load->view('Utama/member_form', $data);
}
function tambah_aksi()
{
$data = array(
'id_member' => $this->input->post('id_member'),
'username_member' => $this->input->post('username_member'),
'password_member' => $this->input->post('password_member'),
'nama_member' => $this->input->post('nama_member'),
'jk_member' => $this->input->post('jk_member'),
'hp_member' => $this->input->post('hp_member'),
'alamat_member' => $this->input->post('alamat_member'),
'email_member' => $this->input->post('email_member')
);
$this->member_model->tambah_data($data);
redirect('Login_member');
}
View
<h3> FORM <i class="icon-arrow-left"></i> LANJUT BERBELANJA </h3> <hr class="soft"/> <table class="table table-bordered">
<tr><th> FORM DAFTAR MEMBER </th></tr>
<form action="<?php echo $aksi; ?>" method="get" class="form-horizontal" enctype="multipart/form-data">
<tr>
<td>
<div class="control-group">
<label class="control-label" for="inputUsername">Username</label>
<div class="controls">
</td>
<td>
<input type="text" name="username_member" class="form-control" placeholder="Inputkan Username" value="">
</div>
</div>
</td>
<tr>
<td>
<div class="control-group">
<label class="control-label" for="inputPassword1">Password</label>
<div class="controls">
</td>
<td>
<input type="password" name="password_member" placeholder="Password" value="">
</div>
</div>
</td>
</tr>
<tr>
<td>
<div class="control-group">
<label class="control-label" for="inputPassword1">Nama Member</label>
<div class="controls">
</td>
<td>
<input type="text" name="nama_member" placeholder="ex : Eden Hazard" value="">
</div>
</div>
</td>
</tr>
<tr>
<td>
<div class="control-group">
<label class="control-label" for="inputPassword1">Jenis Kelamin</label>
<div class="controls">
</td>
<td>
<input type="radio" name="jk_member" value="Laki">Pria
<br>
<input type="radio" name="jk_member" value="Wanita">Wanita
</div>
</div>
</td>
</tr>
<tr>
<td>
<div class="control-group">
<label class="control-label" for="inputPassword1">No Hp</label>
<div class="controls">
</td>
<td>
<input type="text" name="hp_member" placeholder="ex : 08127516331" value="">
</div>
</div>
</td>
</tr>
<tr>
<td>
<div class="control-group">
<label class="control-label" for="inputPassword1">Alamat Lengkap</label>
<div class="controls">
</td>
<td>
<input type="text" name="alamat_member" placeholder="ex : perum pandau blok c.19 no.16, Pekanbaru, Riau" value="">
</div>
</div>
</td>
</tr>
<tr>
<td>
<div class="control-group">
<label class="control-label" for="inputPassword1">Email</label>
<div class="controls">
</td>
<td>
<input type="text" name="email_member" placeholder="ex : randy#yahoo.com" value="">
</div>
</div>
</td>
</tr>
<tr>
<td>
<input type="hidden" name="id_member" value="<?php echo $id_member; ?>">
<button class="btn btn-primary" type="submit"><?php echo $button; ?></button>
</td>
</tr>
</form>

Answer 1

You want to change your forms method from get to post as you are processing POST data.
So your line
<form action="<?php echo $aksi; ?>" method="get" class="form-horizontal" enctype="multipart/form-data">
Change the get to post for your method.
<form action="<?php echo $aksi; ?>" method="post" class="form-horizontal" enctype="multipart/form-data">
See how that flies.