原理图“my-comp”无法解析工厂

Posted 2023-03-13

【中文标题】原理图“my-comp”无法解析工厂

【英文标题】：Schematic "my-comp" cannot resolve the factory

【发布时间】：2019-08-09 23:11:34

【问题描述】：

我正在关注这本书：https://github.com/manfredsteyer/schematics-sample

当我执行我的原理图时

schematics .:my-comp

我收到以下错误：

An error occured:
Error: Schematic "my-comp" cannot resolve the factory.
    at NodeModulesEngineHost.createSchematicDescription (/home/.../.npm-global/lib/node_modules/@angular-devkit/schematics-cli/node_modules/@angular-devkit/schematics/tools/file-system-engine-host-base.js:174:19)
    at SchematicEngine.createSchematic (/home/.../.npm-global/lib/node_modules/@angular-devkit/schematics-cli/node_modules/@angular-devkit/schematics/src/engine/engine.js:219:38)
    at CollectionImpl.createSchematic (/home/.../.npm-global/lib/node_modules/@angular-devkit/schematics-cli/node_modules/@angular-devkit/schematics/src/engine/engine.js:69:29)
    at NodeWorkflow.execute (/home/.../.npm-global/lib/node_modules/@angular-devkit/schematics-cli/node_modules/@angular-devkit/schematics/src/workflow/base.js:99:38)
    at main (/home/.../.npm-global/lib/node_modules/@angular-devkit/schematics-cli/bin/schematics.js:202:24)
    at Object.<anonymous> (/home/.../.npm-global/lib/node_modules/@angular-devkit/schematics-cli/bin/schematics.js:293:5)
    at Module._compile (internal/modules/cjs/loader.js:701:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:712:10)
    at Module.load (internal/modules/cjs/loader.js:600:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:539:12)

这是我工厂的一部分：

    export default function myComp(options: IFlexComponentOptions): Rule 
  return (host: Tree, context: SchematicContext) => 
    console.log("options before sanatize", options);
    ...
    return rule(host, context);
  ;

我的 collectionion.json

  "$schema": "../node_modules/@angular-devkit/schematics/collection-schema.json",
  "schematics": 
    "my-comp": 
      "description": "This schematics generate an Angular Component on the current module or in an specified one",
      "factory": "./my-comp/index#myComp"
    
  

【参考方案1】：

我遇到了同样的问题，从 export default function myComp 删除 default。它应该工作。我遵循同一本书。很多不兼容的地方。

【讨论】：

这与 collections.json 文件如何引用工厂有关 - 如果您将函数导出为默认值，则不需要工厂引用中的 #helloWorld。如果您确实保留了哈希，那将是导出函数的名称，在本例中为helloWorld，如果它被导出，则默认函数名称不存在。因此，要引用默认导出，请不要在 collection.json 工厂属性中包含哈希，并且在没有默认导出的情况下，您需要哈希来识别要引用的导出函数。