属性名称是字符串的预期类型，但得到的apollo-codegen为null错误

debugcn 发表于 Dev

李钟锡

大家！

希望您的帮助...！

我用CRA创建了一个React项目，

后端是graphql +端口3000上的节点。

它工作正常“ http：// localhost：5000 ”

脚本“ precodegen”也可以正常工作，因此，在客户端生成了schema.json。

但是，在codegen命令中发生以下错误。

请帮帮我...！谢谢〜！

package.json

  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject",
    "precodegen": "apollo-codegen introspect-schema http://localhost:5000/graphql --output schema.json",
    "codegen": "apollo-codegen generate './src/**/!(*.local).ts'  --addTypename  --schema schema.json --target typescript --output ./src/__generated__/api.d.ts"
  },

终端错误

yarn codegen
yarn run v1.17.3
$ apollo-codegen introspect-schema http://localhost:5000/graphql --output schema.json
$ apollo-codegen generate './src/**/!(*.local).ts'  --addTypename  --schema schema.json --target typescript --output ./src/__generated__/api.d.ts
TypeError: Property name expected type of string but got null
    at validate (/Users/jongseoklee/dev/ts-graphql/client/node_modules/@babel/types/lib/definitions/utils.js:159:13)
    at Object.validate (/Users/jongseoklee/dev/ts-graphql/client/node_modules/@babel/types/lib/definitions/utils.js:196:7)
    at validateField (/Users/jongseoklee/dev/ts-graphql/client/node_modules/@babel/types/lib/validators/validate.js:24:9)
    at validate (/Users/jongseoklee/dev/ts-graphql/client/node_modules/@babel/types/lib/validators/validate.js:17:3)
    at builder (/Users/jongseoklee/dev/ts-graphql/client/node_modules/@babel/types/lib/builders/builder.js:38:27)
    at Object.Identifier (/Users/jongseoklee/dev/ts-graphql/client/node_modules/@babel/types/lib/builders/generated/index.js:334:31)
    at nonNullableTypeFromGraphQLType (/Users/jongseoklee/dev/ts-graphql/client/node_modules/apollo-codegen-typescript/src/helpers.ts:47:34)
    at TypescriptAPIGenerator.typeFromGraphQLType (/Users/jongseoklee/dev/ts-graphql/client/node_modules/apollo-codegen-typescript/src/helpers.ts:55:20)
    at TypescriptAPIGenerator.handleFieldValue (/Users/jongseoklee/dev/ts-graphql/client/node_modules/apollo-codegen-typescript/src/codeGeneration.ts:428:20)
    at /Users/jongseoklee/dev/ts-graphql/client/node_modules/apollo-codegen-typescript/src/codeGeneration.ts:347:20
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

内森

我试图仅在我的项目中使用yarn安装apollo-codegen，但出现此错误。当我按照说明全局安装apollo-codegen时，此错误消失了。不是我想要的解决方案，但目前看来还不错。

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