使用 Spring Boot 查询 mongoDB 中的对象数组

Question

我有 mongoDB 集合如下

{
  "_id": "ba4d5a0e-1759-4e88-bd57-5e7781d46da7",
  "name": "Doc 3 updated",
  "documentClass": "033a1f67-b382-43f5-b1e4-7ade26f1522c",
  "documentClassName": "Sample Document",
  "meta": [
    {
      "index_field_id": "9e744f36-1c63-45e8-8180-3ceef894b724",
      "value": "a"
    },
    {
      "index_field_id": "08afba06-9a7e-4df8-a946-a8cccbefda8b",
      "value": "asafsf"
    }
  ],
  "version": 2,
  "archived": false,
  "checkedOut": false,
  "checkedOutBy": "svpadm",
  "created": {
    "$date": "2023-12-24T11:12:39.580Z"
  },
  "modified": {
    "$date": "2024-01-09T19:48:29.785Z"
  },
  "owner": "79866869-398a-4920-975b-032decc12461",
  "ownerClear": "svpadm",
  "tenant": "ECMDEV01-T",
  "updatedBy": "79866869-398a-4920-975b-032decc12461",
  "updatedByClear": "svpadm",
  "_class": "de.metasonic.cloud.models.database.Document"
}

然后我想通过

phrase

搜索这个文档，然后想检查以下

indexFieldsId

中的任何

List<String> indexFieldIds

是否存在于

meta

对象数组中，所以我找到了一个查询

@Query("{$and: ["
            + " {$or: ["
            + "  {'name': {$regex: ?0, $options: 'i'}}, "
            + "  {'documentClass': {$regex: ?0, $options: 'i'}}, "
            + "  {'documentClassName': {$regex: ?0, $options: 'i'}}, "
            + "  {'workbookId': {$regex: ?0, $options: 'i'}}, "
            + "  {'owner': {$regex: ?0, $options: 'i'}}, "
            + "  {'ownerClear': {$regex: ?0, $options: 'i'}}, "
            + "  {'tenant': {$regex: ?0, $options: 'i'}}, "
            + "  {'updatedBy': {$regex: ?0, $options: 'i'}}, "
            + "  {'updatedByClear': {$regex: ?0, $options: 'i'}}, "
            + "  {'linkedDocuments': {$elemMatch: {$regex: ?0, $options: 'i'}}}, "
            + "  {'providerState': {$regex: ?0, $options: 'i'}}, "
            + "  {'providerMetaData': {$elemMatch: {$regex: ?0, $options: 'i'}}}"
            + " ]},"
            + " {'meta': {$elemMatch: {'index_field_id': {$in: ?1}}}}"
            + "]}"
    )
    Page<Document> searchByPhraseAndIndexFieldIds(String searchPhrase, List<String> indexFieldIds, Pageable pageable);

但这给了我一个例外

Exception : org.springframework.data.mongodb.UncategorizedMongoDbException: Query failed with error code 2 with name 'BadValue' and error message '$elemMatch needs an Object' on server localhost:27018; nested exception is com.mongodb.MongoQueryException: Query failed with error code 2 with name 'BadValue' and error message '$elemMatch needs an Object' on server localhost:27018

有人可以帮我吗

Answer 1

使用

$elemMatch

时，您似乎只有一个查询条件。 文档状态：

如果您在

$elemMatch

表达式中仅指定单个条件，并且不在

$not

内部使用

$ne

或

$elemMatch

运算符，则可以省略

$elemMatch

。

我不使用 Spring，这个错误不会发生在 Node 中，但这意味着你可以更改为：

{'linkedDocuments': {$regex: ?0, $options: 'i'}},

和

 {'providerMetaData': {$regex: ?0, $options: 'i'}}"

而不是使用

$elemMatch

。