[英]Installed module 'express-validator' cannot be found in NodeJS/Express project
我想验证端点在调用它时收到的输入。 因此,我在我的 NodeJS web 应用程序中安装了express-validator 。 但是,当我尝试使用它时,它会引发错误:
Cannot find module 'express-validator' or its corresponding type declarations
当我导入它(即import { validationResult } from "express-validator";
)或将其设置为常量并要求它时,就会发生这种情况。 在后者中,它声明它找不到模块。 我已经对项目进行了码头化,这是我设置的 dockerfile:
FROM node:12
WORKDIR /app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 8000
CMD ["npm", "run", "dev"]
目前,我没有运行生产版本,这就是我使用 dev 运行的原因。 这是我的 docker-compose 文件:
services:
db:
image: postgres:12
environment:
- POSTGRES_DB=server_side
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=123321
app:
build:
context: .
dockerfile: Dockerfile
volumes:
- ./src:/app/src
ports:
- "8000:8000"
depends_on:
- db
environment:
- POSTGRES_DB=server_side
- POSTGRES_USER=postgres
- POSTGRES_PASSWORD=123321
- POSTGRES_HOST=db
安装模块时,它被添加到我的依赖项中:
{
"name": "Servier-side",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"build": "tsc",
"dev": "concurrently \"nodemon\" \"nodemon -x tsoa spec\"",
"start": "node build/index.js",
"predev": "npm run swagger",
"prebuild": "npm run swagger",
"swagger": "tsoa spec",
"typeorm": "node --require ts-node/register ./node_modules/typeorm/cli.js",
"migrate:generate": "npm run typeorm migration:generate -- -n",
"migrate:run": "npm run typeorm migration:run",
"migrate:revert": "npm run typeorm migration:revert",
"schema:drop": "npm run typeorm schema:drop"
},
"keywords": [],
"author": "",
"license": "ISC",
"devDependencies": {
"@types/express": "^4.17.13",
"@types/morgan": "^1.9.3",
"@types/node": "^16.11.10",
"@types/swagger-ui-express": "^4.1.3",
"concurrently": "^6.4.0",
"nodemon": "^2.0.15",
"ts-node": "^10.4.0",
"typescript": "^4.5.2"
},
"dependencies": {
"express": "^4.17.1",
"express-validator": "^6.13.0",
"morgan": "^1.10.0",
"pg": "^8.7.1",
"reflect-metadata": "^0.1.13",
"swagger-ui-express": "^4.1.6",
"tsoa": "^3.2.1",
"typeorm": "^0.2.41"
},
"nodemonConfig": {
"watch": [
"src"
],
"ext": "ts",
"exec": "ts-node src/index.ts"
}
}
如果有人能阐明此事,我将不胜感激。 只是为了排除可能的原因,我也尝试过Joi ,但我最终遇到了同样的问题。 所以,我想了解是什么导致了这个问题 - 为什么对依赖项的 rest 有效,而不是这个,应该怎么做才能解决这个问题?
这种错误通常是当您需要为模块添加@types 依赖项时。
使用构建标志docker-compose up --build
运行 docker compose 修复了该问题。
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