UPDATE DATA

/-- Controller --/
==================
    public function update(){
        $data = array('success' => false, 'messages' => array(), 'result' => array());

        $this->load->library('form_validation');

        $this->form_validation->set_rules('Txt_Kode', 'Kode Barang', 'trim|required');
        $this->form_validation->set_rules('Txt_Nama', 'Nama Barang', 'trim|required');
        $this->form_validation->set_rules('Txt_Harga', 'Harga Barang', 'trim|required');

        $this->form_validation->set_error_delimiters('<span class="help-block">', '</span>');

        if ($this->form_validation->run()) {
            $data['success'] = true;

            foreach ($_POST as $key => $value) {
                $data['result'][$key] = (object) $this->input->post($key);
            }

            $update = [
                'barang_nama'   => $data['result']['Txt_Nama'],
                'barang_harga'  => $data['result']['Txt_Harga']
            ];

            $kunci = [
                'barang_kode'   => $data['result']['Text_Kode']
            ];

            //$this->barang->update($kunci, $update);

        } else {
            foreach ($_POST as $key => $value) {
                $data['messages'][$key] = form_error($key);
            }
        }

        echo json_encode($data);

    }


/-- Model --/
=============
    public function update_barang($key, $data){
        return $this->db->update("tbl_barang", $data, $key);
    }


/-- View --/
============
    <div class="row">
        <div class="col-lg-12">
            <div class="panel panel-default">
                <?php echo form_open('#', ['id' => 'form', 'class' => 'form-horizontal']);?>
                    <div class="panel-body">
                        <div class="form-group">
                            <?php echo form_label('Kode Barang', 'Txt_Kode', ['class' => 'control-label col-xs-3']);?>
                            <div class="col-xs-9">
                                <?php echo form_input('Txt_Kode', '', ['class' => 'form-control', 'placeholder' => 'Kode Barang', 'style' => 'width: 335px;']);?>
                                <?php echo form_hidden('Text_Kode');?>
                            </div>
                        </div>
                        <div class="form-group">
                            <?php echo form_label('Nama Barang', 'Txt_Nama', ['class' => 'control-label col-xs-3']);?>
                            <div class="col-xs-9">
                                <?php echo form_input('Txt_Nama', '', ['id' => 'Txt_Nama', 'class' => 'form-control', 'placeholder' => 'Nama Barang', 'style' => 'width: 335px;']);?>
                            </div>
                        </div>
                        <div class="form-group">
                            <?php echo form_label('Harga Barang', 'Txt_Harga', ['class' => 'control-label col-xs-3']);?>
                            <div class="col-xs-9">
                                <?php echo form_input('Txt_Harga', '', ['id' => 'Txt_Harga', 'class' => 'form-control', 'placeholder' => 'Harga Barang', 'style' => 'width: 335px;']);?>
                            </div>
                        </div>
                        <div class="form-group">
                            <div class="col-xs-offset-3">
                                <?php echo form_button(['type' => 'button', 'class' => 'btn btn-primary', 'id' => 'Tombol', 'content' => '<i class="fa fa-save"></i> Simpan', 'onclick' => 'tombol()']);?>
                                <?php echo form_button(['type' => 'button', 'class' => 'btn btn-danger', 'id' => 'Reset', 'content' => '<i class="fa fa-refresh"></i> Reset']);?>
                            </div>
                        </div>
                    </div>
                <?php echo form_close();?>
            </div>
        </div>
    </div>