版本号：3.3.0

问题描述：

代码生成 主子表vue3模板报错
2022-07-21 10:33:37.894 ERROR 16896 [141f6a169de97cf5] [http-nio-7001-exec-10] freemarker.runtime:60 Error executing FreeMarker template

freemarker.core.InvalidReferenceException: The following has evaluated to null or missing:
==> subMainFieldMap[sub.entityName] [in template "jvxe\onetomany\java\${bussiPackage}\${entityPackage}\vue3Native\components\${entityName}Form.vuei" at line 186, column 103]

Tip: It's the final [] step that caused this error, not those before it.

Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??

FTL stack trace ("~" means nesting-related):
- Failed at: ${subMainFieldMap[sub.entityName]} [in template "jvxe\onetomany\java\${bussiPackage}\${entityPackage}\vue3Native\components\${entityName}Form.vuei" at line 186, column 101]

at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134)
at freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:481)
at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:401)
at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:370)
at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:100)
at freemarker.core.DollarVariable.accept(DollarVariable.java:63)
at freemarker.core.Environment.visit(Environment.java:347)
at freemarker.core.Environment.visit(Environment.java:389)

截图&代码：

友情提示（为了提高issue处理效率）：

• 未按格式要求发帖，会被直接删掉;
• 请自己初判问题描述是否清楚，是否方便我们调查处理；
• 针对问题请说明是Online在线功能(需说明用的主题模板)，还是生成的代码功能；
• 描述过于简单或模糊，导致无法处理的，会被直接删掉；