我需要保存一个Map< Object,List< Object>>.当我填充包含类时,将保存该节点,但不会保存该地图.
这是我用于实体的代码
@NodeEntity
public class UserAlias{
@GraphId
private Long id;
@Fetch
private Map<IdentityType,List<Permission>> aliases;
private String name;
}
......
userAliasRepo.save(userAlias)
IdentityType是一个Enum,Permission是另一个未使用@NodeEntity注释的类.
userAliasRepo扩展了GraphRepository.
所以我该如何保存Map,我是Spring Data Neo4j版本3.3.0.RELEASE
我要实现的是将以下json与UserAlias NodeEntity相关联
{
"name": "Bond",
"permissions": {
"Level5Acess": {
"READ": false,
"WRITE": false,
"CREATE": false,
"DEL": true
},
"Level4Acess": {
"READ": false,
"WRITE": false,
"CREATE": false,
"DEL": true
},
"Level1Acess": {
"READ": true,
"WRITE": true,
"CREATE": true,
"DEL": true
},
"Level0Acess": {
"READ": true,
"WRITE": true,
"CREATE": true,
"DEL": true
}
}
}
解决方法:
如@ frant.hartm指定
Other collection types than Set are not supported so far, also
currently NO Map>.
但是可以使用org.springframework.data.neo4j.fieldaccess.DynamicProperties代替映射,然后再映射到节点属性.唯一的权衡是,它仅支持原始数据类型及其对应的数组.
@NodeEntity
public class Person {
@GraphId
private Long graphId;
private DynamicProperties personalProperties;
public void setProperty(String key, Object value) {
personalProperties.setProperty(key, value);
}
public Object getProperty(String key) {
return personalProperties.getProperty(key);
}
}
@Test
public void testCreateOutsideTransaction() {
Person p = new Person("James", 35);
p.setProperty("s", "String");
p.setProperty("x", 100);
p.setProperty("pi", 3.1415);
persist(p);
assertEquals(3, IteratorUtil.count(p.getPersonalProperties().getPropertyKeys()));
assertProperties(nodeFor(p));
p.setProperty("s", "String two");
persist(p);
assertEquals("String two", nodeFor(p).getProperty("personalProperties-s"));
}