英文:
File type validation in strapi v4
问题
我正在使用Strapi作为我的后端。我在集合中有一些字段，其中一些应该只接受zip文件，而另一些应该只接受图像等。
我从Strapi提供的数据类型中选择了文件类型。
尽管我没有选择图像作为数据类型，但当我在Postman中传递一个图像到字段时，它仍然接受图像，我认为这是显而易见的行为，因为图像也是一种文件类型。
我的问题是，是否可以进行任何验证，以便这些字段只允许上传zip文件或我想要上传的任何文件类型？
英文:
I am using strapi as my backend. I have some fields in collection from which some should accept only zip file while some should accept only images etc.
I selected file type from datatypes available in strapi.
Though I have not selected images as data type but when I hit the endpoint with postman passing an image in the field then it accepts the image which I believe that obvious behavior as image is also one type of file.
My question is that is there any validation I can put such that these fields should allow only zip or whatever type of file I want to upload?
答案1
得分: 1
没有已知的内置解决方案来验证字段，但在实体创建过程开始之前有一些执行选项：
- 模型生命周期，
beforeCreate事件 - 策略
- 中间件
所以 Google 建议，如果抛出错误，beforeCreate 应该阻止实体创建：
首先，让我们创建一个包含 media 字段并接受 single 媒体文件的内容类型。
让我们为此内容类型创建生命周期文件：
src/api/contentType/content-types/contentType/lifecycles.js
const { ForbiddenError } = require("@strapi/utils").errors;
module.exports = {
beforeCreate(event) {
const { data, where, select, populate } = event.params;
// 请注意，如果您通过管理界面创建，该行可能会有所不同
const media = await strapi.db
.query("plugin::upload.file")
.findOne({ where: { id: data.media } });
if (media.mime !== "application/x-zip-compressed")
throw new ForbiddenError("文件不是 ZIP 格式");
}
}
备注：如果您通过 rest api 创建，与 media 相关的部分可能会不同。
英文:
there is no known build in solution for validating fields, however there is few options that executing before entity creation process started:
- model lifecycle,
beforeCreateevent - policy
- middleware
So google suggests beforeCreate should prevent entity creation if you throw an error:
First, let's create an content-type that has media field that accepts single media file.
let's create lifecycles file for this content type:
src/api/contentType/content-types/contentType/lifecycles.js
const { ForbiddenError } = require("@strapi/utils").errors;
module.exports = {
beforeCreate(event) {
const { data, where, select, populate } = event.params;
// PLS NOTE THAT LINE MAYBE DIFFERENT IF YOU CREATE FROM ADMIN VS REST
const media = await strapi.db
.query("plugin::upload.file")
.findOne({ where: { id: data.media } });
if (media.mime !== "application/x-zip-compressed")
throw new ForbiddenError("File is not ZIP");
}
P.S. Tested with create from admin ui if you create via rest api the part with media maybe different
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