不要在mongodb文档中使用空字符串值的商店键

发布于 2025-02-13 08:34:42 字数 633 浏览 0 评论 0原文

我想在MongoDB中存储一个文档。我正在使用Mongoose进行建模，并且内容由用户使用表单创建。表单的内容附加到FormData并发送到服务器。到目前为止，这起作用了。唯一的问题是，在reqbody中将其附加为空字符串的空字段将存储在文档中。最小化我的dataschema的范围已经设置为真……

const post = req.body;
await Post.create(post);

req.body看起来像：

[Object: null prototype] {
  image: '',
  title: 'hi',
  subtitle: '',
  category: 'Jobs',
  tags: '',
  text: '',
  contactperson: '',
  contact: '',
  author: 'Felicia',
  expires: '2022-08-06'
}

我的文档看起来完全一样，但是我想让它看起来像这样：

{
  title: 'hi',
  category: 'Jobs',
  author: 'Felicia',
  expires: '2022-08-06'
}

非常感谢您的帮助！

原文

i would like to store a post as a document in mongodb. I’m using mongoose for modelling and the content is created by a user using a form. The content of the form is append to FormData and sending to server. This works so far. The only issue is, that empty fields, that are appended as empty strings in the req.body will be stored in the document. The minimalize-property of my dataschema is already set true …

const post = req.body;
await Post.create(post);

req.body looks like:

[Object: null prototype] {
  image: '',
  title: 'hi',
  subtitle: '',
  category: 'Jobs',
  tags: '',
  text: '',
  contactperson: '',
  contact: '',
  author: 'Felicia',
  expires: '2022-08-06'
}

My document looks exactly the same, but i would like to make it look like this:

{
  title: 'hi',
  category: 'Jobs',
  author: 'Felicia',
  expires: '2022-08-06'
}

Thanks so much for your help!

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她如夕阳 2025-02-20 08:34:42

您可以通过过滤req.body＆nbsp;空属性来构建对象。

const post = {};
for (const key in req.body) {
    const value = req.body[key];
    if (value && value !== '') {
        post[key] = value
    }
}
await Post.create(post);

You could build an object by filtering the req.body empty properties with:

const post = {};
for (const key in req.body) {
    const value = req.body[key];
    if (value && value !== '') {
        post[key] = value
    }
}
await Post.create(post);

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攀登最高峰 2025-02-20 08:34:42

let post = {
  image: '',
  title: 'hi',
  subtitle: '',
  category: 'Jobs',
  tags: undefined,
  text: null,
  contactperson: '',
  contact: '',
  author: 'Felicia',
  expires: '2022-08-06'
};
let payload ={}
Object.keys(post).filter((key) => !!post[key] && (payload[key] = post[key]));
console.log(payload)

let post = {
  image: '',
  title: 'hi',
  subtitle: '',
  category: 'Jobs',
  tags: undefined,
  text: null,
  contactperson: '',
  contact: '',
  author: 'Felicia',
  expires: '2022-08-06'
};
let payload ={}
Object.keys(post).filter((key) => !!post[key] && (payload[key] = post[key]));
console.log(payload)

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喵星人汪星人 2025-02-20 08:34:42

您可以使用set用于Mongoose模式的方法：

const mySchema = new mongoose.Schema(
  {
    myAttribute: {
      type: String,
      set: (attribute: string) => attribute === '' ? undefined : attribute,
    },
  },
  { strict: 'throw' },
);

如果字符串等于'，这将使字段删除。

用它来修剪字符串：
set：（a：string）=＆gt; a？.trim（）===''？未定义：

You could use the set method for Mongoose Schemas:

const mySchema = new mongoose.Schema(
  {
    myAttribute: {
      type: String,
      set: (attribute: string) => attribute === '' ? undefined : attribute,
    },
  },
  { strict: 'throw' },
);

This will unset the field if the string equals ''.

Use this to trim the strings:
set: (a: string) => a?.trim() === '' ? undefined : a

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