Opencart网站默认的后台分类显示只有5个显示 如何显示更多产品分类 category autocomplete feature，assign a parent category to a new category or product

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Opencart默认的后台分类显示只有5个，对于分类比较多的不太好用，一般的网站，怎么也不会少于5个分类的。要怎么修改呢？

找到这个文件
admin/controller/catalog/category.php   

//下面的5改成你要的数字 大致在589行

if (isset($this->request->get['filter_name'])) {
    $this->load->model('catalog/category');
$filter_data = array(
    'filter_name' => $this->request->get['filter_name'],
    'sort' => 'name',
    'order' => 'ASC',
    'start' => 0,
    'limit' => 5
);

你可以改为： 'limit' => 50，
或者，你直接删除这个代码，当然注销也是最好的方式，那就是没有限制了。很难理解，这个opencart开发者，不知在想什么，不知为什么要做这个限制。
这样，就会自动弹出所有的分类了。

The code snippet you've found in the catalog.php file is related to the category autocomplete feature, which is likely why only 5 categories are being displayed in the parent category selection dropdown when you're adding or editing categories. Specifically, this part of the code limits the number of categories shown to 5:

This limitation means that only the first 5 categories are returned in the autocomplete search. To resolve this and allow more categories to be shown in the dropdown, you can increase the limit value.
Solution:

• Increase the Limit:
  Modify the line where the limit is set. Change the limit from 5 to a larger number (or remove the limit entirely if you want all categories to show).
  php
  'limit' => 50  // Or any higher number depending on how many categories you want to display
• Remove the Limit (optional):
  If you want to remove the limit entirely and allow all categories to appear, you can set the limit to a very large number or simply remove the line entirely (though the limit might still be set in other parts of the code). For instance:
  php
  // Remove or comment out this line to let all categories appear//'limit' => 5
  However, be mindful that removing the limit could slow down the autocomplete search if there are many categories in your system.
• Clear Cache (optional):
  After making this change, clear your OpenCart cache and refresh your admin panel to ensure the changes take effect.
  

Considerations:

• Performance:
  If your store has a large number of categories, displaying them all at once can affect performance, especially in terms of how fast the dropdown loads. It's a good idea to limit the categories in cases where the total number of categories is large, but you can increase the limit to a reasonable number like 20, 50, or more based on your store's needs.
• Autocomplete:
  The autocomplete feature is useful for speeding up category selection when there are many categories. If you're expecting a large number of categories and don't want to overload the interface, keeping the limit in place but allowing more categories to appear might be a good middle ground.
  

By adjusting this line of code, you should be able to show more categories in the parent category dropdown in your OpenCart admin panel.

还有哪些原因，弹不出所有的分类呢？ 可以参考。

In OpenCart, if not all categories are appearing when you try to assign a parent category to a new category or product, there are a few common causes to check:
1. Category Hierarchy:

• OpenCart allows for a hierarchical structure where categories can have parent-child relationships. If a category is set as a child of another category, it won't show as a "parent" in the category selection unless it is assigned as a parent itself.
• Check if a category is set as a child: If you have categories set as children of other categories, they won't be available for selection as parent categories when you're adding a new one.
  

2. Category Status:

• Ensure that the categories you're trying to assign as parents are active and not set to "disabled" in the system. Disabled categories will not be available for selection in the parent dropdown.
• To check this: Go to Catalog > Categories in the admin panel, and make sure the status of the categories is set to "Enabled."
  

3. Category Sort Order:

• The categories in the parent dropdown are often displayed based on their sort order. If you’ve set custom sort orders for categories, some categories might appear lower in the list or be missing if the sort order is misconfigured.
• To adjust this: When editing a category, check the Sort Order field to ensure categories are ordered in a way that makes sense.
  

4. Category or Product Limitations:

• Sometimes, OpenCart has limitations on the number of categories or products that can be loaded into the dropdown due to system constraints or configurations (though this is less common).
• If you're adding a lot of categories, it might also slow down or result in an incomplete display.
  

5. Database Issues:

• In some cases, the database might have missing or incomplete data, which can prevent categories from displaying correctly.
• Check the database: If you're comfortable with database management, you can inspect the category table to ensure that all categories are properly saved and connected.
  

6. Cache Issues:

• OpenCart heavily relies on caching for faster page loads. After making changes to categories, such as adding a new one, you might need to refresh the cache to see changes reflected.
• To clear the cache: Go to Dashboard > Extensions > Extension Installer and click on Refresh. You can also clear the browser cache to ensure you're seeing the most up-to-date data.
  

7. Permissions:

• If you're using user groups or permissions in OpenCart, make sure that the admin user has permission to view and manage the categories you’re trying to select as parents.
• To check this: Go to System > Users > User Groups and ensure your admin user has appropriate permissions under "Access Permission" and "Modify Permission."
  

8. Extensions or Modifications:

• If you are using third-party extensions or modifications (like VQMod or OCMOD), they might interfere with the way categories are displayed or managed.
• Disable or check extensions: Try disabling any third-party extensions temporarily to see if the problem persists. If this solves the issue, you may need to update or configure the extension correctly.
  

By addressing these possible issues, you should be able to resolve why all categories are not appearing when assigning a parent to a category or product.