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[英]Do I need to separate models, views and controllers for back-end and front-end?
[英]How do I replace front-end views with JSONs in Codeigniter 3?
我正在使用Codeigniter 3.1.8開發 博客應用程序 。
目前,它的管理區域與前端已完全分開。 后端 (管理區域)和前端都使用“經典” Codeigniter視圖顯示數據。
我認為,如果可以用JSONS替換前端的經典視圖,這樣可以獨立於經典的Codeigniter視圖而使用Vue或Angular等前端技術來格式化和顯示它們,那將是很棒的,而我只能在后端使用。
JSONS應該直接從涉及帖子和單個帖子頁面功能的控制器中刪除, 而無需使用views 。
我需要一個可靠的方法,因為控制器非常復雜。 這是Posts控制器:
class Posts extends CI_Controller {
public function __construct()
{
parent::__construct();
}
private function _initPagination($path, $totalRows, $query_string_segment = 'page') {
//load and configure pagination
$this->load->library('pagination');
$config['base_url'] = base_url($path);
$config['query_string_segment'] = $query_string_segment;
$config['enable_query_strings'] =TRUE;
$config['reuse_query_string'] =TRUE;
$config['total_rows'] = $totalRows;
$config['per_page'] = 12;
if (!isset($_GET[$config['query_string_segment']]) || $_GET[$config['query_string_segment']] < 1) {
$_GET[$config['query_string_segment']] = 1;
}
$this->pagination->initialize($config);
$limit = $config['per_page'];
$offset = ($this->input->get($config['query_string_segment']) - 1) * $limit;
return ['limit' => $limit, 'offset' => $offset];
}
public function index() {
//call initialization method
$config = $this->_initPagination("/", $this->Posts_model->get_num_rows());
$data = $this->Static_model->get_static_data();
$data['pages'] = $this->Pages_model->get_pages();
$data['categories'] = $this->Categories_model->get_categories();
//use limit and offset returned by _initPaginator method
$data['posts'] = $this->Posts_model->get_posts($config['limit'], $config['offset']);
$this->load->view('partials/header', $data);
$this->load->view('posts');
$this->load->view('partials/footer');
}
public function byauthor($authorid){
$data = $this->Static_model->get_static_data();
$data['pages'] = $this->Pages_model->get_pages();
$data['categories'] = $this->Categories_model->get_categories();
$data['posts'] = $this->Posts_model->get_posts_by_author($authorid);
$data['posts_count'] = $this->Posts_model->posts_by_author_count($authorid);
$data['posts_author'] = $this->Posts_model->posts_author($authorid);
$this->load->view('partials/header', $data);
$this->load->view('posts_by_author');
$this->load->view('partials/footer');
}
public function post($slug) {
$data = $this->Static_model->get_static_data();
$data['pages'] = $this->Pages_model->get_pages();
$data['categories'] = $this->Categories_model->get_categories();
$data['posts'] = $this->Posts_model->sidebar_posts($limit=5, $offset=0);
$data['post'] = $this->Posts_model->get_post($slug);
if ($data['categories']) {
foreach ($data['categories'] as &$category) {
$category->posts_count = $this->Posts_model->count_posts_in_category($category->id);
}
}
if (!empty($data['post'])) {
// Overwrite the default tagline with the post title
$data['tagline'] = $data['post']->title;
// Get post comments
$post_id = $data['post']->id;
$data['comments'] = $this->Comments_model->get_comments($post_id);
$this->load->view('partials/header', $data);
$this->load->view('post');
} else {
$data['tagline'] = "Page not found";
$this->load->view('partials/header', $data);
$this->load->view('404');
}
$this->load->view('partials/footer');
}
}
因此,我需要一個堅如磐石的方法來一次性將所有內容作為JSON吐出。
最好的方法是什么?
您是否嘗試過使用本地php對其進行簡單編碼? 還是這里的問題是什么?
我會這樣做:
$data['json']=json_encode($data);
因此您可以在視圖中使用$ json。
…然后是JS前端中的JSON.parse。
在控制器中創建用於回顯json輸出的方法
public $json = array();
public function render_json()
{
$this->output
->set_status_header(200)
->set_content_type('application/json')
->set_output(json_encode( $this->json ));
}
並在控制器內部的任何方法中都追加到$this->json
數組:
$this->json['key'] = 'value';
然后渲染:
$this->render_json();
順便說一句,如果您想在全球范圍內使用它,只需將其移至基本控制器即可。
例
public function fetch()
{
$this->json['key'] = 'value';
$this->render_json();
}
現在,當您通過ajax調用此方法時,它將為您提供一個JSON對象,其中包含js中$this->json
數組中的內容:
.done(function( response ) {
console.log(response.key); // = value
});
我在控制器的每個方法中都使用了以下代碼, 而不是呈現視圖 :
$this->output->set_content_type('application/json')->set_output(json_encode($data));
這就是控制器現在的樣子:
class Posts extends CI_Controller {
public function __construct()
{
parent::__construct();
}
private function _initPagination($path, $totalRows, $query_string_segment = 'page') {
//load and configure pagination
$this->load->library('pagination');
$config['base_url'] = base_url($path);
$config['query_string_segment'] = $query_string_segment;
$config['enable_query_strings'] =TRUE;
$config['reuse_query_string'] =TRUE;
$config['total_rows'] = $totalRows;
$config['per_page'] = 12;
if (!isset($_GET[$config['query_string_segment']]) || $_GET[$config['query_string_segment']] < 1) {
$_GET[$config['query_string_segment']] = 1;
}
$this->pagination->initialize($config);
$limit = $config['per_page'];
$offset = ($this->input->get($config['query_string_segment']) - 1) * $limit;
return ['limit' => $limit, 'offset' => $offset];
}
public function index() {
//call initialization method
$config = $this->_initPagination("/", $this->Posts_model->get_num_rows());
$data = $this->Static_model->get_static_data();
$data['pages'] = $this->Pages_model->get_pages();
$data['categories'] = $this->Categories_model->get_categories();
//use limit and offset returned by _initPaginator method
$data['posts'] = $this->Posts_model->get_posts($config['limit'], $config['offset']);
$this->output->set_content_type('application/json')->set_output(json_encode($data));
}
public function byauthor($authorid){
$data = $this->Static_model->get_static_data();
$data['pages'] = $this->Pages_model->get_pages();
$data['categories'] = $this->Categories_model->get_categories();
$data['posts'] = $this->Posts_model->get_posts_by_author($authorid);
$data['posts_count'] = $this->Posts_model->posts_by_author_count($authorid);
$data['posts_author'] = $this->Posts_model->posts_author($authorid);
$this->output->set_content_type('application/json')->set_output(json_encode($data));
}
public function post($slug) {
$data = $this->Static_model->get_static_data();
$data['pages'] = $this->Pages_model->get_pages();
$data['categories'] = $this->Categories_model->get_categories();
$data['posts'] = $this->Posts_model->sidebar_posts($limit=5, $offset=0);
$data['post'] = $this->Posts_model->get_post($slug);
if ($data['categories']) {
foreach ($data['categories'] as &$category) {
$category->posts_count = $this->Posts_model->count_posts_in_category($category->id);
}
}
if (!empty($data['post'])) {
// Overwrite the default tagline with the post title
$data['tagline'] = $data['post']->title;
// Get post comments
$post_id = $data['post']->id;
$data['comments'] = $this->Comments_model->get_comments($post_id);
$this->output->set_content_type('application/json')->set_output(json_encode($data));
} else {
$data['tagline'] = "Page not found";
$this->output->set_content_type('application/json')->set_output(json_encode($data));
}
$this->output->set_content_type('application/json')->set_output(json_encode($data));
}
}
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