英文:
Error while fetch data from db with neo4j-go-driver connection
问题
if err != nil {
logger.Log.Printf("DEBUG:1 GetStockComments : %s", err.Error())
return []Comment{}, err
}
var records []Comment
comment := Comment{}
for result.Next() {
record := result.Record()
if value, ok := record.Get("c"); ok {
node := value.(neo4j.Node)
props := node.Props()
err := mapstructure.Decode(props, &comment)
if err != nil {
logger.Log.Printf("DEBUG:2 GetStockComments : %s", err.Error())
return []Comment{}, err
}
records = append(records, comment)
}
}
在session.Run和result.Next()的某些时候出现了错误。在Postman中没有显示错误，但是当我尝试使用代码按顺序运行API时，就会出现这个错误。错误信息如下：
runtime error: invalid memory address or nil pointer dereference
goroutine 122 [running]:
net/http.(*conn).serve.func1(0xc0002ba500)
/usr/lib/go-1.13/src/net/http/server.go:1767 +0x139
panic(0x964400, 0xf64c70)
/usr/lib/go-1.13/src/runtime/panic.go:679 +0x1b2
github.com/neo4j/neo4j-go-driver/neo4j.(*result).doFetch(0xc0001f7b00, 0x0)
/root/go/pkg/mod/github.com/neo4j/neo4j-go-driver@v1.8.3/neo4j/result.go:73 +0x32
github.com/neo4j/neo4j-go-driver/neo4j.(*result).fetchAll(0xc0001f7b00)
/root/go/pkg/mod/github.com/neo4j/neo4j-go-driver@v1.8.3/neo4j/result.go:134 +0x31
github.com/neo4j/neo4j-go-driver/neo4j.(*session).consumeCurrent(0xc00020e000, 0x1, 0x0)
/root/go/pkg/mod/github.com/neo4j/neo4j-go-driver@v1.8.3/neo4j/session.go:433 +0x34
github.com/neo4j/neo4j-go-driver/neo4j.(*session).Run(0xc00020e000, 0xa1ec6a, 0x8b, 0xc000703860, 0x0, 0x0, 0x0, 0xc0002d6a80, 0x7f8ecca62008, 0x0, ...)
/root/go/pkg/mod/github.com/neo4j/neo4j-go-driver@v1.8.3/neo4j/session.go:450 +0x4a
英文:
if err != nil {
logger.Log.Printf("DEBUG:1 GetStockComments : s%", err.Error())
return []Comment{}, err
}
var records []Comment
comment := Comment{}
for result.Next() {
record := result.Record()
if value, ok := record.Get("c"); ok {
node := value.(neo4j.Node)
props := node.Props()
err := mapstructure.Decode(props, &comment)
if err != nil {
logger.Log.Printf("DEBUG:2 GetStockComments : s%", err.Error())
return []Comment{}, err
}
records = append(records, comment)
}
}
Some time on Session.run, result.Next()
Error not shown on the postman, when I try to run APIs in sequence using code then it will happen
runtime error: invalid memory address or nil pointer dereference
goroutine 122 [running]:
net/http.(*conn).serve.func1(0xc0002ba500)
/usr/lib/go-1.13/src/net/http/server.go:1767 +0x139
panic(0x964400, 0xf64c70)
/usr/lib/go-1.13/src/runtime/panic.go:679 +0x1b2
github.com/neo4j/neo4j-go-driver/neo4j.(*result).doFetch(0xc0001f7b00, 0x0)
/root/go/pkg/mod/github.com/neo4j/neo4j-go-driver@v1.8.3/neo4j/result.go:73 +0x32
github.com/neo4j/neo4j-go-driver/neo4j.(*result).fetchAll(0xc0001f7b00)
/root/go/pkg/mod/github.com/neo4j/neo4j-go-driver@v1.8.3/neo4j/result.go:134 +0x31
github.com/neo4j/neo4j-go-driver/neo4j.(*session).consumeCurrent(0xc00020e000, 0x1, 0x0)
/root/go/pkg/mod/github.com/neo4j/neo4j-go-driver@v1.8.3/neo4j/session.go:433 +0x34
github.com/neo4j/neo4j-go-driver/neo4j.(*session).Run(0xc00020e000, 0xa1ec6a, 0x8b, 0xc000703860, 0x0, 0x0, 0x0, 0xc0002d6a80, 0x7f8ecca62008, 0x0, ...)
/root/go/pkg/mod/github.com/neo4j/neo4j-go-driver@v1.8.3/neo4j/session.go:450 +0x4a
答案1
得分: 1
我已经解决了这个问题，我只是在项目启动时开始了数据库会话，但是我需要在每次查询运行时都开始和关闭。这解决了我的问题，谢谢大家...
英文:
I have solved this issue, I just start DB session on project start, but I need to start and close on every query run. This solved my problem, thanks all...
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