【发布时间】：2017-05-14 07:54:53
【问题描述】：
在我的 Spring Boot / Spring Data MongoDB 项目中，我有以下 POJO：
@Document(collection = "decision_analysis")
public class DecisionAnalysis {
private String id;
private DecisionAnalysisRequest decisionAnalysisRequest;
private DecisionMatrixPageResponse decisionMatrixPage;
private Date createDate;
private HttpRequestData httpRequestData;
...
}
DecisionAnalysisRequest:
public class DecisionAnalysisRequest implements Serializable {
private static final long serialVersionUID = 1493180175756424789L;
private String decisionNameFilterPattern;
private Set<BaseQuery> filterQueries;
private Set<Long> sortCriteriaIds;
private String sortWeightCriteriaDirection;
private String sortTotalVotesCriteriaDirection;
private Map<String, Double> sortCriteriaCoefficients;
private Long sortCharacteristicId;
...
}
我需要通过DecisionAnalysisRequest 查找DecisionAnalysis 文档，因此我使用以下方法创建了一个Spring Data MongoDB 存储库：
@Repository
public interface DecisionAnalysisRepository extends MongoRepository<DecisionAnalysis, String> {
DecisionAnalysis findByDecisionAnalysisRequest(DecisionAnalysisRequest decisionAnalysisRequest);
}
目前此方法仅在filterQueries 为空时有效。但是当filterQueries 不为null 时，该方法连续不返回任何结果。
filterQueries是一个复合对象数组，例如：
"filterQueries":[
{
"type":"AnyInQuery",
"characteristicId":711903,
"characteristicName":"Body type",
"value":[
"Compact"
],
"operator":"OR"
},
{
"type":"RangeQuery",
"characteristicId":712745,
"characteristicName":"Sensor photo detectors (megapixels)",
"value":[
10,
53
]
}
]
我做错了什么以及如何调整我的代码以便通过DecisionAnalysisRequest 正确查找DecisionAnalysis 文档，即使filterQueries 包含数据。
更新
这是一个示例DecisionAnalysisRequest 文档，我将使用它作为键（此文档中的信息每次在 UI 上选择的每个用户都会有所不同）：
{
"sortCriteriaIds":[
711882,
711887,
711884,
711899,
711896,
711897,
711890,
711891,
711888,
711889,
711895,
711892,
711893
],
"sortCriteriaCoefficients":{
},
"pageNumber":0,
"pageSize":10,
"sortWeightCriteriaDirection":"DESC",
"sortid":null,
"sortCharacteristicDirection":null,
"sortDecisionPropertyName":null,
"sortDecisionPropertyDirection":null,
"decisionsIds":[
],
"persistent":true,
"includeChildids":null,
"excludeChildids":null,
"filterQueries":[
{
"type":"AnyInQuery",
"characteristicId":711913,
"characteristicName":"Body material",
"value":[
"Aluminium alloy",
"Brass",
"Carbon fiber"
],
"operator":"OR"
},
{
"type":"AnyInQuery",
"characteristicId":711903,
"characteristicName":"Body type",
"value":[
"Compact SLR",
"Compact"
],
"operator":"OR"
},
{
"type":"EqualQuery",
"characteristicId":712746,
"characteristicName":"Sensor size",
"value":"1/1.7\" (7.44 x 5.58 mm)"
},
{
"type":"AnyInQuery",
"characteristicId":712895,
"characteristicName":"Color space",
"value":[
"Adobe RGB",
"ECI RGB",
"Primary color space"
],
"operator":"OR"
},
{
"type":"AnyInQuery",
"characteristicId":712145,
"characteristicName":"Other resolutions",
"value":[
"1008 x 672",
"1024 x 1024",
"1024 x 576"
],
"operator":"OR"
},
{
"type":"AnyInQuery",
"characteristicId":712738,
"characteristicName":"Image ratio w:h",
"value":[
"1:1",
"3:2",
"4:3"
],
"operator":"OR"
},
{
"type":"RangeQuery",
"characteristicId":712744,
"characteristicName":"Effective pixels (megapixels)",
"value":[
9,
44
]
},
{
"type":"EqualQuery",
"characteristicId":712901,
"characteristicName":"Color filter array",
"value":"RGB color filter array"
},
{
"type":"EqualQuery",
"characteristicId":712921,
"characteristicName":"Image stabilization",
"value":"Sensor-shift"
},
{
"type":"AnyInQuery",
"characteristicId":712944,
"characteristicName":"Uncompressed format",
"value":[
"No",
"RAW",
"TIFF"
],
"operator":"OR"
},
{
"type":"AnyInQuery",
"characteristicId":712928,
"characteristicName":"Image parameters",
"value":[
"Brightness",
"Color",
"Color Space",
"Color Tone",
"Contrast"
],
"operator":"OR"
},
{
"type":"RangeQuery",
"characteristicId":712919,
"characteristicName":"White balance presets",
"value":[
2,
10
]
},
{
"type":"RangeQuery",
"characteristicId":712917,
"characteristicName":"Boosted ISO (minimum)",
"value":[
1762,
10741
]
},
{
"type":"AnyInQuery",
"characteristicId":712950,
"characteristicName":"File format",
"value":[
"3FR",
"AGIF",
"ARW"
],
"operator":"OR"
},
{
"type":"RangeQuery",
"characteristicId":712918,
"characteristicName":"Boosted ISO (maximum)",
"value":[
339298,
2878034
]
},
{
"type":"RangeQuery",
"characteristicId":713340,
"characteristicName":"Normal focus range (cm)",
"value":[
22,
131
]
},
{
"type":"EqualQuery",
"characteristicId":713343,
"characteristicName":"Lens mount",
"value":"Leica M"
},
{
"type":"AnyInQuery",
"characteristicId":713325,
"characteristicName":"Autofocus",
"value":[
"Center",
"Continuous",
"Contrast Detect (sensor)",
"Face Detection",
"Live View"
],
"operator":"OR"
},
{
"type":"RangeQuery",
"characteristicId":713341,
"characteristicName":"Macro focus range (cm)",
"value":[
19,
75
]
},
{
"type":"RangeQuery",
"characteristicId":713342,
"characteristicName":"Number of focus points",
"value":[
78,
468
]
},
{
"type":"RangeQuery",
"characteristicId":713388,
"characteristicName":"Viewfinder resolution (dots)",
"value":[
633548,
3722581
]
},
{
"type":"RangeQuery",
"characteristicId":713386,
"characteristicName":"Viewfinder coverage %",
"value":[
84,
97
]
}
]
}
【问题讨论】：
-
这是因为它会尝试将 mongo 中的对象与您作为参数传递给使用
equals方法的方法的对象进行比较。如果你的类中没有，它将采用默认的 Equals 方法并且会失败，因为它会进行深度比较。尝试在您的 DecisionAnalysisRequest 类中定义一个 equals（当然还有哈希码）方法，并且不要在您的 equals 方法定义中包含filterQueries。（不用说，您也不应该在您的哈希码中包含它） -
另一种解决方案可能是在
DecisionAnalysisRequest类中包含一个唯一字段（如 id）并使用该 id 进行查询。如果您的新 Unique 字段名为id，那么您的 repositoryMethod 将类似于findByDecisionAnalysisRequest_Id(...) -
@pvpkiran 感谢您的回答。为什么我不需要在我的 equals/hashcode 方法中包含
filterQueries？filterQueries是DecisionAnalysisRequest对象唯一性的重要组成部分。另外，我不能使用任何代理 ID 字段，根据我的业务逻辑，密钥是DecisionAnalysisRequest本身，其中包含所有数据（也包括filterQueries） -
当然可以使用。那么在这种情况下，您应该对每个子字段进行深入比较
-
我已经尝试过了，但由于某种原因它不起作用..
标签： java spring mongodb spring-data spring-data-mongodb