dede channel type是什么？

Of course! This is a fundamental concept in the DedeCMS (织梦内容管理系统) system.

In DedeCMS, the Channel Type (频道模型) is the core structure that defines what a specific channel (or section) on your website will contain and how it will behave. Think of it as a blueprint or a template for creating different types of content sections.

Instead of forcing every section of your site to be a simple "article," you can create custom models for different purposes, like a product catalog, a download center, an image gallery, or a news portal.

Here’s a detailed breakdown of the Channel Type concept.

What is a Channel Type?

A Channel Type is a pre-defined set of fields and settings that determine:

• What kind of data can be stored in that channel (e.g., title, author, content, price, download link, image dimensions).
• How the content is displayed on the frontend (via specific templates).
• What functions are available for managing that content (e.g., can users comment? can it be rated?).

The Two Main Types of Channels

DedeCMS distinguishes between two types of channels, which are directly related to the Channel Type you choose:

A. Primary Channel (主栏目)

• What it is: This is a top-level section that can only hold other sub-channels (Secondary Channels). It cannot hold content articles directly.
• Common Use Cases:
  • Website navigation menus (e.g., "Products," "Services," "About Us").
  • Grouping related sections together (e.g., a "News" primary channel that contains "Latest News" and "Archive News" as sub-channels).
• Channel Type: By default, a Primary Channel uses the "Channel" (频道) model. This model is minimal because it's not meant to store content.

B. Secondary Channel (栏目)

• What it is: This is a content-holding channel. It can contain articles and can also have its own sub-channels. This is the most common type of channel used for actual content.
• Common Use Cases:
  • A "Product Reviews" section where you publish individual review articles.
  • A "Software Download" section for listing different software programs.
  • A "Photo Gallery" for showcasing images.
• Channel Type: This is where you choose your custom Channel Type (频道模型). You are not limited to the default "Article" (文章) model. You can select from any you have created, like "Download" (下载), "Product" (产品), or a custom one you built yourself.

Common Built-in Channel Types

DedeCMS comes with several pre-configured channel types. Understanding these is key to building your site.

How to Create a Custom Channel Type

This is one of the most powerful features of DedeCMS. If the built-in models don't fit your needs, you can create your own.

Here is the general workflow:

1. Go to the Channel Type Manager:

   • In the DedeCMS backend, navigate to [Core] -> [Channel Model] -> [Channel Type Management] (频道模型 -> 频道类型管理).

2. Add a New Type:

   • Click the [Add New Type] (增加新类型) button.
   • Give your new type a name (e.g., "Video Tutorial", "Teacher Profile").
   • Set other basic options like whether it supports articles, comments, etc.
   • Click [Save] (保存).

3. Define the Fields (The Most Important Step):

   • After creating the type, you need to define the custom fields for it.
   • Go to [Core] -> [Channel Model] -> [Content Field Management] (频道模型 -> 内容字段管理).
   • Click [Add New Field] (增加新字段).
   • For each field, you will configure:
     • Field Name: A simple name like video_url, teacher_name, course_duration.
     • Field Alias: A more formal name for display, like "Video Link", "Instructor", "Course Length".
     • Data Type: Choose from various types:
       • Text Textfield (单行文本)
       • Textarea Textarea (多行文本)
       • Editor Editor (编辑器)
       • Select Dropdown (下拉选择)
       • Checkbox (复选框)
       • Radio (单选按钮)
       • Image Uploader (图片上传)
       • Remote Media (远程多媒体) - for videos from platforms like YouTube.
     • Default Value: A pre-filled value.
     • Whether to display on the list: If checked, this field will appear in the content management table, making it easier to browse.

4. Use Your New Channel Type:

   • When you create a new Secondary Channel (栏目), you will now see your custom "Video Tutorial" type in the dropdown menu.
   • Select it, and your new channel will now use the fields you defined.

Summary