添加链接 注册    登录
link之家
链接快照平台
  • 输入网页链接，自动生成快照
  • 标签化管理网页链接
相关文章推荐
调皮的斑马  ·  配置文件简介 - PowerShell | ...·  1 年前    · 
潇洒的山楂  ·  vba判断word表格中单元格内空是否为空_ ...·  2 年前    · 
慈祥的砖头  ·  怎样在word转PDF的时候自动生成目录_w ...·  2 年前    · 
至今单身的保温杯  ·  jquery 监听 show事件传参数-掘金·  2 年前    · 
俊秀的松球  ·  哪种票据打印机耐用？汉印等厂家典型产品推荐 ...·  2 年前    · 
link之家  ›  ConditionalOperators.IfNull (Spring Data MongoDB 4.1.0 API)
https://docs.spring.io/spring-data/mongodb/docs/current/api/org/springframework/data/mongodb/core/aggregation/ConditionalOperators
兴奋的铅笔
2 年前
Package org.springframework.data.mongodb.core.aggregation

Class ConditionalOperators.IfNull

java.lang.Object
org.springframework.data.mongodb.core.aggregation.ConditionalOperators.IfNull
All Implemented Interfaces:
AggregationExpression , MongoExpression
Enclosing class:
ConditionalOperators
public static class ConditionalOperators.IfNull extends Object implements AggregationExpression
Encapsulates the aggregation framework $ifNull operator. Replacement values can be either field references , expressions , values of simple MongoDB types or values that can be converted to a simple MongoDB type.
Author:
Mark Paluch
See Also:
  • https://docs.mongodb.com/manual/reference/operator/aggregation/ifNull/
    • Description
    static ConditionalOperators.IfNull.ThenBuilder
    ifNull ( String fieldReference)
    Creates new ConditionalOperators.IfNull .
    static ConditionalOperators.IfNull.ThenBuilder
    ifNull ( AggregationExpression expression)
    Creates new ConditionalOperators.IfNull .
    org.bson.Document
    toDocument ( AggregationOperationContext context)
    Turns the AggregationExpression into a Document within the given AggregationOperationContext .

    Methods inherited from class java.lang. Object

    clone , equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait

    Methods inherited from interface org.springframework.data.mongodb.core.aggregation. AggregationExpression

    toDocument

    ifNull

    public static ConditionalOperators.IfNull.ThenBuilder ifNull ( String fieldReference)
    Creates new ConditionalOperators.IfNull .
    Parameters:
    fieldReference - the field to check for a null value, field reference must not be null.
    Returns:
    never null.

    ifNull

    public static ConditionalOperators.IfNull.ThenBuilder ifNull ( AggregationExpression expression)
    Creates new ConditionalOperators.IfNull .
    Parameters:
    expression - the expression to check for a null value, field reference must not be null.
    Returns:
    never null.

    toDocument

    public org.bson.Document toDocument ( AggregationOperationContext context)
    Description copied from interface: AggregationExpression
    Turns the AggregationExpression into a Document within the given AggregationOperationContext .
    Specified by:
    toDocument in interface AggregationExpression
    Parameters:
    context - must not be null.
    Returns:
    the MongoDB native ( Document ) form of the expression.
     
    推荐文章
    调皮的斑马  ·  配置文件简介 - PowerShell | Microsoft Learn
    1 年前
    潇洒的山楂  ·  vba判断word表格中单元格内空是否为空_vba判断单元格是否为空-CSDN博客
    2 年前
    慈祥的砖头  ·  怎样在word转PDF的时候自动生成目录_word转pdf目录-CSDN博客
    2 年前
    至今单身的保温杯  ·  jquery 监听 show事件传参数-掘金
    2 年前
    俊秀的松球  ·  哪种票据打印机耐用？汉印等厂家典型产品推荐 - 腾讯云开发者社区-腾讯云
    2 年前
    今天看啥   ·   Py中国   ·   codingpro   ·   小百科   ·   link之家   ·   卧龙AI搜索
    删除内容请联系邮箱 2879853325@qq.com
    link之家 - 链接快照平台
    © 2024 ~ 沪ICP备11025650号