如何在 Elastic.Clients.Elasticsearch for .Net 中创建索引映射

Question

我正在使用 .NET nuget 包“Elastic.Clients.Elasticsearch”（版本 8）并尝试基于以下模型创建索引映射。如何映射 Employee 成员及其 JobRole 成员？我尝试使用“对象”和“嵌套”，但没有运气。

此外，如何排除属性被索引？属性映射如：

[Text(Name = "last_name")]

...版本 8 不再支持。唯一的选项是“流畅映射”。

不幸的是，只有版本 7 可用的文档， https://www.elastic.co/guide/en/elasticsearch/client/net-api/7.17/ Fluent-mapping.html

public class Company
{
    public string CompanyName { get; set; }
    public Employee EmployeeInfo { get; set; }
}


public class Employee
{
    public string EmployeeName { get; set; }
    public JobRole[] JobRoles { get; set; }
}


public class JobRole
{
    public string RoleName { get; set; }
}

这是我的代码，正如你所看到的，我中途迷路了..

var createIndexResponse = client.Indices.Create<Company>("myindex", c => c
            .Mappings(m => m
                .Properties(p => p
                    .Keyword(s => s.CompanyName)
                 .Object<Employee> (x=>x.EmployeeInfo.EmployeeName  // Got lost here...
                )
            )
        );

任何人？

Answer 1

创建新属性时，它请求的 IProperty 是您分配给字段的属性类型。如 TextProperty、ObjectProperty、NestedProperty、LongProperty：

    var response = await _client.Indices.CreateAsync<Company>("myindex", c => c
        .Mappings(map => map
            .Properties(p => p
            .Text(t => t.CompanyName)
            .Object(o => o.EmployeeInfo, objConfig => objConfig
                .Properties(p => p
                    .Text(t => t.EmployeeInfo.EmployeeName)
                    .Object(n => n.EmployeeInfo.JobRoles, objConfig => objConfig
                        .Properties(p => p
                            .Text(t => t.EmployeeInfo.JobRoles.First().RoleName)
                        )
                    )
                )
            )
        )
    ));

ObjectProperty jobRolesProperty = new ();
    jobRolesProperty.Properties.Add("roleName", new TextProperty());

    var response = await _client.Indices.CreateAsync<Company>("myindex", c => c
        .Mappings(map => map
            .Properties(
                new Properties<Company>()
                {
                    { "companyName", new TextProperty() },
                    { "employeeInfo", new ObjectProperty()
                    {
                            Properties = new Properties<Employee>()
                            {
                                { "employeeName", new TextProperty() },
                                { "jobRoles", jobRolesProperty }
                            }
                        }
                    }
                }
            )
        )
    );

 //Another syntax usage
ObjectProperty jobRolesProperty = new ();
    jobRolesProperty.Properties.Add("roleName", new TextProperty());

        var response = await _client.Indices.CreateAsync<Company>("myindex", c => c
        .Mappings(map => map
            .Properties(p => p
            .Text(t => t.CompanyName)
            .Object(o => o.EmployeeInfo, objConfig => objConfig
                .Properties(
                            new Properties<Employee>()
                            {
                                { "employeeName", new TextProperty() },
                                { "jobRoles", jobRolesProperty }
                            }
                )
            )
        )
    ));

创建的映射：

{
"mappings": {
    "properties": {
        "companyName": {
            "type": "text"
        },
        "employeeInfo": {
            "properties": {
                "employeeName": {
                    "type": "text"
                },
                "jobRoles": {
                    "properties": {
                        "roleName": {
                            "type": "text"
                        }
                    },
                    "type": "object"
                }
            },
            "type": "object"
        }
    }
}

}

要管理设置，您可以检查此答案： Elastic Search 8 Defining Analyticsrs