像neo4j中的查询一样参数化

Question

我想将此查询创建为参数化查询.

var query = ["Match (name:Name)-[r:IN_CLASS]->(class:Class)-[r1:HAS_STUDENTS]->(s:Student) where id(s)=",rollno," and lower(s.Name)=~'.*",name,".*' RETURN id(s),s.Name limit 5"].join('');

我试过这段代码,但它给出了错误:

var query = ["Match (name:Name)-[r:IN_CLASS]->(class:Class)-[r1:HAS_STUDENTS]->(s:Student) where id(s)=",rollno," and lower(s.Name)=~'.*{name}.*' RETURN id(s),s.Name limit 5"].join('');

db.query(query , {name : name} , function(err,results){
    if (err) return callback(err);
    if(results){
        return callback(null,results);
    }
    else{
        return callback(null,false);
    }
});

请告诉我哪里错了？

Answer 1

您不能拥有属于文字的参数.你试过了

... WHERE ... lower(s.Name)=~'.*{name}.*'

相反,整个正则表达式需要是参数值:

... WHERE ... lower(s.Name)=~ {name}

你需要与你的串联值.*以.*<value>.*在客户端和传递这个作为参数值.

编辑:

您也可以在Cypher中连接:

... WHERE ... lower(s.Name)=~'.*'+{name}+'.*'

对于不区分大小写的正则表达式使用:

... WHERE ... s.Name =~'(?i).*'+{name}+'.*'