无法导入jdl文件

Question

我对JHipster有个问题。我不能在刚刚从头创建的项目中导入任何JDL文件。即使是来自JHipster的jdl示例也不起作用。我总是会犯同样的错误：

events.js:182
  throw er; // Unhandled 'error' event
  ^

Error: ERROR! 
Error while parsing entities from JDL

at Environment.error (/project/node_modules/yeoman-environment/lib/environment.js:140:40)
at constructor.error (/project/node_modules/generator-jhipster/generators/generator-base.js:1686:18)
at constructor.parseJDL (/project/node_modules/generator-jhipster/generators/import-jdl/index.js:108:22)
at Object.<anonymous> (/project/node_modules/yeoman-generator/lib/index.js:417:23)
at /project/node_modules/run-async/index.js:25:25
at Promise (<anonymous>)
at /project/node_modules/run-async/index.js:24:19
at /project/node_modules/yeoman-generator/lib/index.js:418:9
at runCallback (timers.js:781:20)
at tryOnImmediate (timers.js:743:5)

使用-调试选项:命令：

yo jhipster:import-jdl ~/Downloads/example.jh

输出：

The jdl is being parsed.
DEBUG! Error:
{ name: 'NoSQLModelingException',
  message: 'NoSQL entities don\'t have relationships.',
  prototype: Error
at new BuildException (/Users/jega/projects/owcHandwerker/plattformapp/node_modules/jhipster-core/lib/exceptions/exception_factory.js:42:25)
at checkNoSQLModeling (/Users/jega/projects/owcHandwerker/plattformapp/node_modules/jhipster-core/lib/parser/entity_parser.js:70:11)
at Object.parse [as convertToJHipsterJSON] (/Users/jega/projects/owcHandwerker/plattformapp/node_modules/jhipster-core/lib/parser/entity_parser.js:40:5)
at constructor.parseJDL (/Users/jega/projects/owcHandwerker/plattformapp/node_modules/generator-jhipster/generators/import-jdl/index.js:93:42)
at Object.<anonymous> (/Users/jega/projects/owcHandwerker/plattformapp/node_modules/yeoman-generator/lib/index.js:417:23)
at /Users/jega/projects/owcHandwerker/plattformapp/node_modules/run-async/index.js:25:25
at Promise (<anonymous>)
at /Users/jega/projects/owcHandwerker/plattformapp/node_modules/run-async/index.js:24:19
at /Users/jega/projects/owcHandwerker/plattformapp/node_modules/yeoman-generator/lib/index.js:418:9
at runCallback (timers.js:781:20) }
Error jhipster:import-jdl /Users/jega/Downloads/example.jh --debug 

Error: ERROR! 
Error while parsing entities from JDL

at Environment.error (/usr/local/lib/node_modules/yo/node_modules/yeoman-environment/lib/environment.js:157:40)
at constructor.error (/Users/jega/projects/owcHandwerker/plattformapp/node_modules/generator-jhipster/generators/generator-base.js:1686:18)
at constructor.parseJDL (/Users/jega/projects/owcHandwerker/plattformapp/node_modules/generator-jhipster/generators/import-jdl/index.js:108:22)
at Object.<anonymous> (/Users/jega/projects/owcHandwerker/plattformapp/node_modules/yeoman-generator/lib/index.js:417:23)
at /Users/jega/projects/owcHandwerker/plattformapp/node_modules/run-async/index.js:25:25
at Promise (<anonymous>)
at /Users/jega/projects/owcHandwerker/plattformapp/node_modules/run-async/index.js:24:19
at /Users/jega/projects/owcHandwerker/plattformapp/node_modules/yeoman-generator/lib/index.js:418:9
at runCallback (timers.js:781:20)
at tryOnImmediate (timers.js:743:5)

我尝试过的JDL文件来自JHipster博客--例如：https://github.com/jhipster/jdl-samples/blob/master/blog.jh

Answer 1

您正在尝试生成在NoSQL项目中使用关系的实体。JHipster不支持NoSQL项目的关系。有关JHipster如何处理关系的更多信息，请参见管理关系上的文档

只有在使用JPA时，关系才能正常工作。如果您选择使用Cassandra或MongoDB，它们将不可用。

删除这些关系允许导入JDL。还可以使用SQL数据库选项尝试使用项目。

在JHipster (v4.10.0+)的未来版本中，JDL错误消息更详细，因此今后不需要使用--debug标志。