无法安装express-graphql

Question

我正在尝试安装express-graphql，但出现此错误。请帮忙！

npm install --save express-graphql 
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! 
npm ERR! While resolving: rest-api@1.0.0
npm ERR! Found: graphql@16.2.0
npm ERR! node_modules/graphql
npm ERR!   graphql@"^16.2.0" from the root project 
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peer graphql@"^14.7.0 || ^15.3.0" from express-graphql@0.12.0
npm ERR! node_modules/express-graphql
npm ERR!   express-graphql@"*" from the root project
npm ERR! 
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.

Answer 1

删除完整的初始化项目，然后运行以下命令：

npm init -y
npm install express express-graphql
npm install graphql

您应该express-graphql先安装graphql。

Answer 2

graphql如果存在模块，请将其卸载。然后用一个命令安装它们：

npm install graphql express-graphql

Answer 3

你可以尝试删除package-lock.json吗？根据github 问题，它可能会有所帮助。