中继编译 Relay Modern 代码时变量不在范围内错误

Posted 2023-03-08

【中文标题】中继编译 Relay Modern 代码时变量不在范围内错误

【英文标题】：Variable is not in scope error when relay-compiling Relay Modern code

【发布时间】：2018-02-21 12:53:38

【问题描述】：

我有以下简单的 Relay Modern 代码：

import React,  Component  from 'react';
import PropTypes from 'prop-types';

import 
    QueryRenderer,
    graphql
 from 'react-relay'


import environment from '../../../../../environment'

const CompanyItemQuery = graphql`

query CompanyItem_Query 
  node(id: $companyId) 
    id
    ...on Company 
      id
      name
    
 

`

class CompanyItem extends Component 

    render() 

        return (
                <QueryRenderer
                    environment=environment
                    query=CompanyItemQuery
                    variables=
                        companyId: 'test',
                    
                    render=(error, props) => 
                        <div>
                            <p>Relay loaded props.name company</p>
                        </div>
                
                />
        );
    
;

export default CompanyItem;

我正在尝试在运行之前对代码进行中继编译，但出现以下错误：

> relay-compiler --src ./src --schema ./src/data/schema.graphql

HINT: pass --watch to keep watching for changes.
Parsed default in 0.08s

Writing default
Invariant Violation: RelayApplyFragmentArgumentTransform: variable `companyId` is not in scope.
    at invariant (D:\DEV\WORKSPACE\client\node_modules\fbjs\lib\invariant.js:44:15)
    at transformValue (D:\DEV\WORKSPACE\client\node_modules\relay-compiler\bin\relay-compiler:4505:28)
    at D:\DEV\WORKSPACE\client\node_modules\relay-compiler\bin\relay-compiler:4497:18
    at Array.map (native)
    at transformArguments (D:\DEV\WORKSPACE\client\node_modules\relay-compiler\bin\relay-compiler:4496:16)
    at transformField (D:\DEV\WORKSPACE\client\node_modules\relay-compiler\bin\relay-compiler:4417:15)
    at D:\DEV\WORKSPACE\client\node_modules\relay-compiler\bin\relay-compiler:4476:24
    at Array.forEach (native)
    at transformSelections (D:\DEV\WORKSPACE\client\node_modules\relay-compiler\bin\relay-compiler:4461:15)
    at transformNode (D:\DEV\WORKSPACE\client\node_modules\relay-compiler\bin\relay-compiler:4385:21)

npm ERR! Windows_NT 10.0.14393
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "relay"
npm ERR! node v6.9.2
npm ERR! npm  v3.10.9
npm ERR! code ELIFECYCLE
npm ERR! mom-client@3.0.0 relay: `relay-compiler --src ./src --schema ./src/data/schema.graphql`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the mom-client@3.0.0 relay script 'relay-compiler --src ./src --schema ./src/data/schema.graphql'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the mom-client package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     relay-compiler --src ./src --schema ./src/data/schema.graphql
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs mom-client
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls mom-client
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     D:\DEV\WORKSPACE\client\npm-debug.log

我不知道为什么我的变量 companyId 不在范围内，因为它是在文档中所述的 QueryRenderer 的 variables 部分中定义的。

如果我对 id 使用固定值（例如 node id: "Company:59b2cda12504b914cc398100"），代码将被中继编译，我可以正常获取我的数据。当我需要动态选择 id 时，就会出现问题。

【参考方案1】：

您似乎错过了在查询名称中声明变量（和类型） - 所以这个：

query CompanyItem_Query($companyId: ID!) 

而不是这个：

query CompanyItem_Query 

您可以在中继站点上的示例中看到更多上下文 - https://facebook.github.io/relay/docs/query-renderer.html

【讨论】：

是的，很简单。