Question

您好我正在尝试进行简单连接

mongoose.connect('mongodb://JFalcon:john2522@ds119476.mlab.com:19476/hidonshabat', {useMongoClient: true}, function(err){
    if(err) {
        console.log('Some problem with the connection ' +err);
    } else {
        console.log('The Mongoose connection is ready');
    }
})

正如您所看到的，这是网址！请帮帮我

Answer 1

mongoose.connect('mongodb://localhost:27017/myapp', **{useNewUrlParser: true}**);

摘自官方文档：

useNewUrlParser-基础的MongoDB驱动程序已弃用其当前的连接字符串解析器。因为这是一个重大变化，所以他们添加了useNewUrlParser标志，以允许用户使用旧的如果他们在新的解析器中发现错误，则解析器。 您应该设置 useNewUrlParser：true ，除非它阻止您连接。注意如果您指定useNewUrlParser：true，则您必须在您的连接字符串，例如mongodb：// localhost：27017 / dbname。新的网址解析器不支持没有端口，例如mongodb：// localhost / dbname。

Answer 2

请更正如下

@Entity
@Table(name="act_re_deployment")
public class ActivitiProcessDeployment implements Serializable{

    @OneToOne (cascade=CascadeType.ALL, mappedBy="deployment")
    private ActivitiProcessDefinition activitiProcessDefinition;
}

@Entity
@Table(name="act_re_procdef")
public class ActivitiProcessDefinition implements Serializable {

    @JsonIgnore
    @OneToOne
    @JoinColumn(name="deployment_id_", unique= true)
    private ActivitiProcessDeployment deployment;

    //remove this
    //@JsonProperty
    //@Column(name="deployment_id_")
    //private String deploymentId;

    @JsonProperty
    public int getDeploymentId(){
        return deployment.getId();
    }
}

Answer 3

var Mongoose=require("mongoose");
var dbURI='mongodb://JFalcon:john2522@ds119476.mlab.com:19476/hidonshabat';
Mangoose.connect(dbURI,function(err){    
    if(err){
    console.log('Some problem with the connection ' +err)   
    } 
    else {
    console.log('The Mongoose connection is ready')  
    }

})
module.exports={Mongoose};

用猫鼬连接到Mlab

3 个答案: