Question

我正在用jHipster做一个实验。

我创建了两个由DTO支持的实体A和B（mapstruct）。他们之间有多对多的关系。他们俩也与用户建立了多对一的关系。

直到创建最后一个关系，一切正常。创建最后的多对一关系后，我收到以下错误：

[INFO] --- maven-processor-plugin:2.2.4:process (process) @ m2m ---
[ERROR] diagnostic: /Users/andy/jhipster-m2m/src/main/java/com/m2m/web/rest/mapper/AMapper.java:18: error: Ambiguous mapping methods found for mapping property "java.lang.Long userId" to com.m2m.domain.User: com.m2m.domain.User userFromId(java.lang.Long id), com.m2m.domain.User com.m2m.web.rest.mapper.BMapper.userFromId(java.lang.Long id).
A aDTOToA(ADTO aDTO);
  ^
[ERROR] error on execute: error during compilation

定义非常简单：对于A：

{
  "relationships": [
    {
        "relationshipId": 1,
        "relationshipName": "b",
        "otherEntityName": "b",
        "relationshipType": "many-to-many",
        "otherEntityField": "id",
        "ownerSide": true
    },
    {
        "relationshipId": 2,
        "relationshipName": "user",
        "otherEntityName": "user",
        "relationshipType": "many-to-one",
        "otherEntityField": "id"
    }
],
"fields": [
    {
        "fieldId": 1,
        "fieldName": "nameA",
        "fieldType": "String"
    }
],
"changelogDate": "20150909165353",
"dto": "mapstruct",
"pagination": "no"

}

对于B：

{
"relationships": [
    {
        "relationshipId": 1,
        "relationshipName": "a",
        "otherEntityName": "a",
        "relationshipType": "many-to-many",
        "ownerSide": false,
        "otherEntityRelationshipName": "b"
    },
    {
        "relationshipId": 2,
        "relationshipName": "user",
        "otherEntityName": "user",
        "relationshipType": "many-to-one",
        "otherEntityField": "id"
    }
],
"fields": [
    {
        "fieldId": 1,
        "fieldName": "nameB",
        "fieldType": "String"
    }
],
"changelogDate": "20150909165433",
"dto": "mapstruct",
"pagination": "no"

}

我真的坚持这个。非常感谢任何帮助!!

编辑：提供演示问题的{github repo https://github.com/andyverbunt/jhipster-m2m.git

Answer 1

这似乎是上面评论中提到的错误。暂时你可以从一个mapper中删除方法，或者在任何一个mapper中重命名方法，我们需要研究如何在Jhipster生成过程中避免这种情况

这也可以通过使用MapStruct限定符来修复（参见参考文档中的Selection based on Qualifiers）。

Answer 2

这似乎是一个错误，但不像上面提到的那样。 JHipster映射器生成器未正确地将@Mapper（...，users = {UserMapper.class}）添加到Mapper类。我在一年后回答这个问题，因为JHipster 3.12.2仍然如此。

在您分享的来源中，替换以下行：

@Mapper(componentModel = "spring", uses = {BMapper.class, })

有了这个：

@Mapper(componentModel = "spring", uses = {BMapper.class, UserMapper.class})

如何修复模糊的映射方法

2 个答案: