spring-boot中配置Mongodbd的问题小结

错误1：

Description:

Parameter 1 of method standardMongoSettingsCustomizer in org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration$MongoClientSettingsConfiguration required a bean of type
 'org.springframework.boot.autoconfigure.mongo.MongoConnectionDetails' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'org.springframework.boot.autoconfigure.mongo.MongoConnectionDetails' in your configuration.

注意版本，由于我开始写了版本号,如下：

 <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-mongodb -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
            <version>4.0.0</version>   最好去掉版本号，自动寻找兼容的
        </dependency>

改成如下：

<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-mongodb -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
        </dependency>

错误2：

Caused by: com.mongodb.MongoQueryException: Command failed with error 2 (BadValue): 'Field 'locale' is invalid in: { locale: "userinfo" }' on server localhost:27017. 
The full response is {"ok": 0.0, "errmsg": "Field 'locale' is invalid in: { locale: \"userinfo\" }", "code": 2, "codeName": "BadValue"}

这个问题我找了很久的原因，

‌问题原因‌：

• 在 @Document 注解中，你很可能将 collection 写成了 collation
• collation 用于指定字符串比较规则，而 collection 才是用来指定集合名称的
• 由于这两个属性名称非常相似，很容易混淆写错

解决方法‌：
将注解中的 collation 改为 collection：

// 错误写法
@Document(collation = "userinfo")

// 正确写法  
@Document(collection = "userinfo")