C# 将null设置为文档属性,并在更新时从数据库中删除字段
我有下面的C级 我也在为我的文档使用模板,下面的模板用于演示测试C# 将null设置为文档属性,并在更新时从数据库中删除字段,c#,
elasticsearch,nest,C#,
elasticsearch,Nest,我有下面的C级 我也在为我的文档使用模板,下面的模板用于演示测试 { "version": 2, "index_patterns": "documents-test*", "order": 2, "aliases": { "docs-test": {} }, "settings": { "number_of_shards": 1 }, "mappings": { "_doc": { "dynamic": "strict",
{
"version": 2,
"index_patterns": "documents-test*",
"order": 2,
"aliases": {
"docs-test": {}
},
"settings": {
"number_of_shards": 1
},
"mappings": {
"_doc": {
"dynamic": "strict",
"properties": {
"id": {
"type": "keyword"
},
"description": {
"enabled": false
}
}
}
}
}
我正在将Description
属性设置为has值
,并为其编制索引。下面是数据库中的一个示例
{
"_index": "documents-test-2019-07-2-2",
"_type": "_doc",
"_id": "55096ff7-5072-4ded-b6a3-94b8e155c9d0",
"_score": 1,
"_source": {
"id": "55096ff7-5072-4ded-b6a3-94b8e155c9d0",
"description": "has value"
}
}
查询文档,将Description
属性设置为null
,并使用下面的嵌套IElasticClient.UpdateAsync
方法更新文档
public async Task<Result> UpdateAsync(
T document,
string indexName = null,
string typeName = null,
Refresh ? refresh = null,
CancellationToken cancellationToken =
default) {
var response = await Client.UpdateAsync<T,
object>(
document.Id,
u => u.Doc(document)
.Index(indexName ? ? DocumentMappings.IndexStrategy)
.Type(typeName ? ? DocumentMappings.TypeName)
.Refresh(refresh),
cancellationToken);
var errorMessage = response.LogResponseIfError(_logger);
return errorMessage.IsNullOrEmpty() ? Result.Ok() : Result.Fail(errorMessage);
}
public异步任务UpdateAsync(
T文件,
字符串indexName=null,
字符串typeName=null,
刷新?刷新=null,
取消令牌取消令牌=
默认值){
var response=await Client.UpdateAsync(
文件Id,
u=>u.Doc(文档)
.Index(indexName??DocumentMappings.IndexStrategy)
.Type(typeName??DocumentMappings.typeName)
.刷新(刷新),
取消令牌);
var errorMessage=response.LogResponseIfError(_logger);
返回errorMessage.IsNullOrEmpty()?Result.Ok():Result.Fail(errorMessage);
}
问题在于,在更新命令后,文档将保持不变,而说明
字段的值为has value
在我看来,最合适的解决方案是将C#classDescription
属性设置为null并更新要从文档中删除的字段
public async Task<Result> UpdateAsync(
T document,
string indexName = null,
string typeName = null,
Refresh ? refresh = null,
CancellationToken cancellationToken =
default) {
var response = await Client.UpdateAsync<T,
object>(
document.Id,
u => u.Doc(document)
.Index(indexName ? ? DocumentMappings.IndexStrategy)
.Type(typeName ? ? DocumentMappings.TypeName)
.Refresh(refresh),
cancellationToken);
var errorMessage = response.LogResponseIfError(_logger);
return errorMessage.IsNullOrEmpty() ? Result.Ok() : Result.Fail(errorMessage);
}
我已经看到了一些答案,但不确定会有什么变化,或者是否有比使用NEST忽略null(繁琐)更好的解决方案或覆盖行为,我最终创建了以下方法
public async Task<Result> UpdateAsync(
T document,
string indexName = null,
string typeName = null,
Refresh? refresh = null,
CancellationToken cancellationToken = default)
{
Guard.Argument(document, nameof(document)).NotNull();
await RemoveNullFieldsFromDocumentAsync(document, document.Id, indexName, typeName, cancellationToken);
var response = await Client.UpdateAsync<T, object>(
document.Id,
u => u.Doc(document)
.Index(indexName ?? DocumentMappings.IndexStrategy)
.Type(typeName ?? DocumentMappings.TypeName)
.Refresh(refresh),
cancellationToken);
var errorMessage = response.LogResponseIfError(_logger);
return errorMessage.IsNullOrEmpty() ? Result.Ok() : Result.Fail(errorMessage);
}
public async Task<Result> UpdateAsync(
string id,
object partialDocument,
string indexName = null,
string typeName = null,
Refresh? refresh = null,
CancellationToken cancellationToken = default)
{
Guard.Argument(partialDocument, nameof(partialDocument)).NotNull();
Guard.Argument(id, nameof(id)).NotNull().NotEmpty().NotWhiteSpace();
await RemoveNullFieldsFromDocumentAsync(partialDocument, id, indexName, typeName, cancellationToken);
var response = await Client.UpdateAsync<T, object>(
id,
u => u.Doc(partialDocument)
.Index(indexName ?? DocumentMappings.IndexStrategy)
.Type(typeName ?? DocumentMappings.TypeName)
.Refresh(refresh),
cancellationToken);
var errorMessage = response.LogResponseIfError(_logger);
return errorMessage.IsNullOrEmpty() ? Result.Ok() : Result.Fail(errorMessage);
}
private async Task<Result> RemoveNullFieldsFromDocumentAsync(
object document,
string documentId,
string indexName = null,
string typeName = null,
CancellationToken cancellationToken = default)
{
var result = Result.Ok();
var allNullProperties = GetNullPropertyValueNames(document);
if (allNullProperties.AnyAndNotNull())
{
var script = allNullProperties.Select(p => $"ctx._source.remove('{p}')").Aggregate((p1, p2) => $"{p1}; {p2};");
result = await UpdateByQueryIdAsync(
documentId,
script,
indexName,
typeName,
cancellationToken: cancellationToken);
}
return result;
}
private static IReadOnlyList<string> GetNullPropertyValueNames(object document)
{
var allPublicProperties = document.GetType().GetProperties().ToList();
var allObjects = allPublicProperties.Where(pi => pi.PropertyType.IsClass).ToList();
var allNames = new List<string>();
foreach (var propertyInfo in allObjects)
{
if (propertyInfo.PropertyType == typeof(string))
{
var isNullOrEmpty = ((string) propertyInfo.GetValue(document)).IsNullOrEmpty();
if (isNullOrEmpty)
{
allNames.Add(propertyInfo.Name.ToCamelCase());
}
}
else if (propertyInfo.PropertyType.IsClass)
{
if (propertyInfo.GetValue(document).IsNotNull())
{
var namesWithobjectName = GetNullPropertyValueNames(propertyInfo.GetValue(document))
.Select(p => $"{propertyInfo.PropertyType.Name.ToCamelCase()}.{p.ToCamelCase()}");
allNames.AddRange(namesWithobjectName);
}
}
}
return allNames;
}
public async Task<Result> UpdateByQueryIdAsync(
string documentId,
string script,
string indexName = null,
string typeName = null,
bool waitForCompletion= false,
CancellationToken cancellationToken = default)
{
Guard.Argument(documentId, nameof(documentId)).NotNull().NotEmpty().NotWhiteSpace();
Guard.Argument(script, nameof(script)).NotNull().NotEmpty().NotWhiteSpace();
var response = await Client.UpdateByQueryAsync<T>(
u => u.Query(q => q.Ids(i => i.Values(documentId)))
.Conflicts(Conflicts.Proceed)
.Script(s => s.Source(script))
.Refresh()
.WaitForCompletion(waitForCompletion)
.Index(indexName ?? DocumentMappings.IndexStrategy)
.Type(typeName ?? DocumentMappings.TypeName),
cancellationToken);
var errorMessage = response.LogResponseIfError(_logger);
return errorMessage.IsNullOrEmpty() ? Result.Ok() : Result.Fail(errorMessage);
}
public异步任务UpdateAsync(
T文件,
字符串indexName=null,
字符串typeName=null,
刷新?刷新=null,
CancellationToken CancellationToken=默认值)
{
参数(document,nameof(document)).NotNull();
Wait RemoveNullFieldsFromDocumentAsync(文档、文档.Id、索引名、类型名、取消令牌);
var response=await Client.UpdateAsync(
文件Id,
u=>u.Doc(文档)
.Index(indexName??DocumentMappings.IndexStrategy)
.Type(typeName??DocumentMappings.typeName)
.刷新(刷新),
取消令牌);
var errorMessage=response.LogResponseIfError(_logger);
返回errorMessage.IsNullOrEmpty()?Result.Ok():Result.Fail(errorMessage);
}
公共异步任务UpdateAsync(
字符串id,
对象部分文档,
字符串indexName=null,
字符串typeName=null,
刷新?刷新=null,
CancellationToken CancellationToken=默认值)
{
参数(partialDocument,nameof(partialDocument)).NotNull();
参数(id,nameof(id)).NotNull().NotEmpty().NotWhiteSpace();
Wait RemoveNullFieldsFromDocumentAsync(partialDocument、id、indexName、typeName、cancellationToken);
var response=await Client.UpdateAsync(
身份证件
u=>u.Doc(部分文件)
.Index(indexName??DocumentMappings.IndexStrategy)
.Type(typeName??DocumentMappings.typeName)
.刷新(刷新),
取消令牌);
var errorMessage=response.LogResponseIfError(_logger);
返回errorMessage.IsNullOrEmpty()?Result.Ok():Result.Fail(errorMessage);
}
专用异步任务RemoveNullFieldsFromDocumentAsync(
目标文件,
字符串documentId,
字符串indexName=null,
字符串typeName=null,
CancellationToken CancellationToken=默认值)
{
var result=result.Ok();
var allNullProperties=GetNullPropertyValueNames(文档);
if(allNullProperties.AnyAndNotNull())
{
var script=allNullProperties.Select(p=>$“ctx.\u source.remove('{p}'))).Aggregate((p1,p2)=>$”{p1};{p2};”;
结果=等待更新ByQueryIdaSync(
文档ID,
剧本
indexName,
字体名,
cancellationToken:cancellationToken);
}
返回结果;
}
私有静态IReadOnlyList GetNullPropertyValueNames(对象文档)
{
var allPublicProperties=document.GetType().GetProperties().ToList();
var allObjects=allPublicProperties.Where(pi=>pi.PropertyType.IsClass).ToList();
var allNames=新列表();
foreach(AllObject中的var propertyInfo)
{
if(propertyInfo.PropertyType==typeof(字符串))
{
var isNullOrEmpty=((字符串)propertyInfo.GetValue(文档)).isNullOrEmpty();
if(isNullOrEmpty)
{
Add(propertyInfo.Name.ToCamelCase());
}
}
else if(propertyInfo.PropertyType.IsClass)
{
if(propertyInfo.GetValue(document.IsNotNull())
{
var namesWithobjectName=GetNullPropertyValueNames(propertyInfo.GetValue(文档))
.Select(p=>$”{propertyInfo.PropertyType.Name.ToCamelCase()}.{p.ToCamelCase()});
allNames.AddRange(namesWithobjectName);
}
}
}
返回所有名称;
}
公共异步任务UpdateByQueryIdAsync(
字符串documentId,
字符串脚本,
字符串indexName=null,
字符串typeName=null,
bool waitForCompletion=false,
CancellationToken CancellationToken=默认值)
{
参数(documentId,nameof(documentId)).NotNull().NotEmpty().NotWhiteSpace();
参数(script,nameof(script)).NotNull().NotEmpty().NotWhiteSpace();
var response=await Client.UpdateByQueryAsync(
u=>u.Query(q=>q.id(i=>i.Values(documentId)))
.冲突(冲突。继续)
.Script(s=>s.Source(Script))
.Refresh()
.WaitForCompletion(WaitForCompletion)
.Index(indexName??DocumentMappings.IndexStrategy