如何向 Strapi 中的内容类型添加非用户可编辑字段? [英] How to add a non-user-editable field to a content type in Strapi?

问题描述

假设我有一个带有以下 4 个字段的 post 内容类型:

Say I have a post content type with the following 4 fields:

• title(字符串)
• content(字符串)
• slug(字符串)
• 作者(关系)

• title (string)
• content (string)
• slug (string)
• author (relationship)

如何添加依赖于上述 4 个字段之一的值且用户不可编辑的第 5 个字段?比如说，我想要一个 wordCount 字段，其中 content 字段中的字数作为其值.为了合并此功能，我应该考虑探索什么文件?

How can I add a 5th field that depends on one of the above 4 fields for its value and isn't user-editable? Say, I wanted a wordCount field with the number of words in the content field as its value. What file should I consider exploring in order to incorporate this functionality?

P.S.:就其价值而言，我正在使用 MongoDB Atlas 来满足我的数据库需求.

P.S.: For what it's worth, I'm using MongoDB Atlas for my database needs.

推荐答案

您必须在您的内容类型中创建您的 wordCount 属性.

You will have to create your wordCount attribute in your content type.

然后在左侧菜单的内容管理器链接中，您将能够自定义编辑/创建页面的视图.您可以在此处禁用或删除页面上的字段.

Then in the content manager link in the left menu, you will be able to custom the view of your edit/create page. Here you will be able to Disable or Remove the field from the page.

之后，您必须进入./api/post/models/Post.js 文件并更新以下函数.

After that you will have to go in the ./api/post/models/Post.js file and update following functions.

如果您使用的是 NoSQL 数据库 (Mongo)

If you are using NoSQL database (Mongo)

beforeSave: async (model) => {
  if (model.content) {
    model.wordCount = model.content.length;
  }
},
beforeUpdate: async (model) => {
  if (model.getUpdate().content) {
    model.update({
      wordCount:  model.getUpdate().content.length
    });
  }
},

如果您使用 SQL(SQLite、Postgres、MySQL)

If you are using SQL (SQLite, Postgres, MySQL)

beforeSave: async (model, attrs, options) => {
  if (attrs.content) {
    attrs.wordCount = attrs.content.length;
  }
},

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