Codeigniter action form not working - php

Question

I try to understand why my form action is not taking me to the controller...I press the update button on my modal, which should update info on modal to the database...and when I press it, nothing happens, no error , no message, it just close the modal and that's it. HELP PLS !!!. Here is my code:
FORM
<div id="modal1" class="modal modal-fixed-footer">
<div class="modal-content">
<h3 class="center-align">Actualizar registro</h3>
<div class="row">
<form class="col s12" id="update_form" enctype="multipart/form-data" method="post" action ="<?= base_url()?>admin/update_politic">
<div class="row">
<div class="input-field col s6">
<input id="update_name" type="text" name="name" class="validate">
<label for="first_name">Nombre</label>
</div>
<div class="input-field col s6">
<input id="update_last_name" name="lastname" type="text" class="validate">
<label for="last_name">Apellido</label>
</div>
</div>
<div class="row">
<div class="input-field col s6">
<input id="update_side" type="text" name="side" class="validate">
<label for="partido">Partido</label>
</div>
<div class="input-field col s6">
<input id="update_charge" type="text" name="charge" class="validate">
<label for="cargo">Cargo</label>
</div>
</div>
<div class="row">
<div class="input-field col s6">
<div class="file-field input-field no-margin-top">
<div class="btn light-blue darken-4">
<span>Animación/Imagen</span>
<input type="file" name="animation_file">
</div>
<div class="file-path-wrapper">
<input class="file-path validate" id="animation" name="animation" type="text">
</div>
</div>
</div>
<div class="input-field col s6">
<select id="update_section" name="section" autocomplete="off">
<option value="" disabled selected>Seleccione una opción</option>
<option value="1">Presidencia</option>
<option value="2">Senadores</option>
<option value="3">Diputados</option>
</select>
<label>Sección</label>
</div>
</div>
<input type="hidden" name="update_politic_hide" id="update_politic_hdn" value="">
<div class="row">
<button class="btn waves-effect waves-light light-blue darken-4" id="submit_update" type="submit" name="action">Actualizar</button>
</div>
</form>
</div>
</div>
CONTROLLER
public function update_politic(){
echo "entreeeeeeee";
if (empty($_FILES['animation_file']['name']))//Compruebo si el array $_files no tiene ningun valor en su elemento name
{
//El metodo obtenerImagen me retorna los valores de dicho id
$data = $this->politic->get_file_name($this->input->post('update_politic_hide'));
$imagen = $data->POLITIC_FILE;//recupero el nombre de la imagen
}
else{
//en caso exista algun valor se procede a subir
$this->load->library("upload");
$config['upload_path'] = "./public/uploads/";
$config['allowed_types'] = "*";
$config['max_size'] = "500000";
$config['max_width'] = "2000";
$config['max_height'] = "2000";
if (!$this->upload->do_upload("animation")) {
$data['uploadError'] = $this->upload->display_errors();
echo $this->upload->display_errors();
}
else {
$file_info = $this->upload->data();
$params["name"] = $this->input->post("name");
$params["lastname"] = $this->input->post("lastname");
$params["side"] = $this->input->post("side");
$params["charge"] = $this->input->post("charge");
$params["animation"] = $file_info['file_name'];
$params["section"] = $this->input->post("section");
if ($params["section"]=="Presidencia") {
$params["section"]=1;
}
if ($params["section"]=="Senadores") {
$params["section"]=2;
}
if ($params["section"]=="Diputados") {
$params["section"]=3;
}
$this->load->model("politic");
$this->politic->update($params);
}
}
}

Answer 1

You have used base_url()?>admin/update_politic for submitting your form. But you have not mentioned about that controller. If you have admin controller then it will be ok. Otherwise, this is the reason for this submission.

Answer 2

Try This
<?php echo form_open(base_url() . 'admin/update_politic' , array('class' => 'form-horizontal form-groups-bordered validate', 'enctype' => 'multipart/form-data'));?>

Answer 3

Instead of button use <input type = "submit" value ="Submit" class="your class name here">