CodeIgniter 3博客应用：更新文章后重定向失败求助

Hey there! Let's get that post-update redirect sorted out for your CodeIgniter blog. This is a common hiccup, but easy to fix once you check a few key spots:

1. Verify Your Controller's Update Logic #

First, make sure your update() method in the Posts controller is handling the redirect correctly after the post is successfully updated. Here's a clean example of how it should look:

public function update() {
    // Run form validation first (you should have this already!)
    $this->form_validation->set_rules('title', 'Title', 'required');
    // Add other validation rules for content, author, etc.

    if ($this->form_validation->run() === FALSE) {
        // If validation fails, reload the edit view with existing data
        $data['post'] = $this->post_model->get_post($this->input->post('id'));
        $this->load->view('posts/edit', $data);
    } else {
        // Grab the post ID from the form submission
        $post_id = $this->input->post('id');
        
        // Prepare update data
        $update_data = [
            'title' => $this->input->post('title'),
            'content' => $this->input->post('content'),
            'updated_at' => date('Y-m-d H:i:s') // Add timestamp if needed
        ];
        
        // Update the post via your model
        $this->post_model->update_post($post_id, $update_data);

        // Redirect to the updated post's view page
        // Adjust the URL to match your route structure!
        redirect('posts/view/' . $post_id);
    }
}

• Critical Check: Never output anything (like echo, var_dump, or loading a view) before calling redirect(). CodeIgniter uses HTTP headers to redirect, and any prior output will break this functionality entirely.

2. Confirm the Post ID is Being Passed Correctly #

Double-check that the hidden id field in your form is actually sending a valid value. Add a quick debug line at the top of your update() method to verify:

// At the start of update()
$post_id = $this->input->post('id');
var_dump($post_id); // Should show a valid number, not NULL

If it's empty, ensure the $post->id variable is properly populated when you load the edit view (double-check your model's get_post method if needed).

3. Match Your Redirect to Custom Routes #

If you've set up custom routes in application/config/routes.php, make sure your redirect URL aligns with those rules. For example, if you have:

// Custom route for single post view
$route['post/(:num)'] = 'posts/view/$1';

Your redirect should use this custom URL instead:

redirect('post/' . $post_id);

4. Rule Out Output Buffering Conflicts #

In rare cases, unintended output buffering can mess with redirects. If you're still stuck, try adding ob_clean() right before the redirect (though this is a band-aid—better to track down and fix any accidental output in your code):

ob_clean();
redirect('posts/view/' . $post_id);

Once you adjust these areas, your post update should smoothly redirect to the updated article's page.

内容的提问来源于stack exchange，提问作者Razvan Zamfir