Cannot decode null into a string type
1
I am trying to decode a struct which contains a result field, where the result field is either a null or string value. I'm trying to decode this into a string pointer but I get the error:
type MyStruct struct {
Result *string `json:"result,omitempty" bson:"result"`
}
The bson/json is something like:
{"result" : null}
or
{"result" : "somedata"}
Decode with:
var result MyStruct
err := collection.FindOne(ctx, filter).Decode(&result)
if err != nil {
s.logFile.Fatal(err)
}
Error:
cannot decode null into a string type
I'm using the official driver: "github.com/mongodb/mongo-go-driver/mongo" & "github.com/mongodb/mongo-go-driver/x/bsonx"
mongodb go
edited Nov 21 '18 at 15:51
Flimzy
39.8k136699
asked Nov 21 '18 at 14:54
budgebudge
149213
|
show 1 more comment
1
I am trying to decode a struct which contains a result field, where the result field is either a null or string value. I'm trying to decode this into a string pointer but I get the error:
type MyStruct struct {
Result *string `json:"result,omitempty" bson:"result"`
}
The bson/json is something like:
{"result" : null}
or
{"result" : "somedata"}
Decode with:
var result MyStruct
err := collection.FindOne(ctx, filter).Decode(&result)
if err != nil {
s.logFile.Fatal(err)
}
Error:
cannot decode null into a string type
I'm using the official driver: "github.com/mongodb/mongo-go-driver/mongo" & "github.com/mongodb/mongo-go-driver/x/bsonx"
mongodb go
edited Nov 21 '18 at 15:51
Flimzy
39.8k136699
asked Nov 21 '18 at 14:54
budgebudge
149213
Far better is avoid null. Empty string is better than pointer.
– Alex Pliutau
Nov 21 '18 at 15:07
Your code should work rightfully. It looks the unmarshaling process is not the reverse of the marshaling process. The official MongoDB driver is in alpha phase. Report this at their site and hope they make this work sometime in the future.
– icza
Nov 21 '18 at 15:31
Why are you traying to have point to stirng. I think your problem may solve if you use Result string
– Ehsan.Saradar
Nov 21 '18 at 16:06
1
I'm parsing data from another teams mongodb, and I think they do it because the value wasn't set, instead of it being set but empty. I'll make a ticket on the mongo driver GitHub. Thanks
– budge
Nov 21 '18 at 16:18
You can try like this play.golang.org/p/K6Nlhg3LN5W.
– Shudipta Sharma
Nov 21 '18 at 17:47
|
show 1 more comment
1
1
1
I am trying to decode a struct which contains a result field, where the result field is either a null or string value. I'm trying to decode this into a string pointer but I get the error:
type MyStruct struct {
Result *string `json:"result,omitempty" bson:"result"`
}
The bson/json is something like:
{"result" : null}
or
{"result" : "somedata"}
Decode with:
var result MyStruct
err := collection.FindOne(ctx, filter).Decode(&result)
if err != nil {
s.logFile.Fatal(err)
}
Error:
cannot decode null into a string type
I'm using the official driver: "github.com/mongodb/mongo-go-driver/mongo" & "github.com/mongodb/mongo-go-driver/x/bsonx"
mongodb go
edited Nov 21 '18 at 15:51
Flimzy
39.8k136699
asked Nov 21 '18 at 14:54
budgebudge
149213
I am trying to decode a struct which contains a result field, where the result field is either a null or string value. I'm trying to decode this into a string pointer but I get the error:
type MyStruct struct {
Result *string `json:"result,omitempty" bson:"result"`
}
The bson/json is something like:
{"result" : null}
or
{"result" : "somedata"}
Decode with:
var result MyStruct
err := collection.FindOne(ctx, filter).Decode(&result)
if err != nil {
s.logFile.Fatal(err)
}
Error:
cannot decode null into a string type
I'm using the official driver: "github.com/mongodb/mongo-go-driver/mongo" & "github.com/mongodb/mongo-go-driver/x/bsonx"
mongodb go
mongodb go
edited Nov 21 '18 at 15:51
Flimzy
39.8k136699
asked Nov 21 '18 at 14:54
budgebudge
149213
edited Nov 21 '18 at 15:51
Flimzy
39.8k136699
asked Nov 21 '18 at 14:54
budgebudge
149213
edited Nov 21 '18 at 15:51
Flimzy
39.8k136699
edited Nov 21 '18 at 15:51
Flimzy
39.8k136699
edited Nov 21 '18 at 15:51
Flimzy
39.8k136699
39.8k136699
asked Nov 21 '18 at 14:54
budgebudge
149213
asked Nov 21 '18 at 14:54
budgebudge
149213
asked Nov 21 '18 at 14:54
budgebudge
149213
149213
Far better is avoid null. Empty string is better than pointer.
– Alex Pliutau
Nov 21 '18 at 15:07
Your code should work rightfully. It looks the unmarshaling process is not the reverse of the marshaling process. The official MongoDB driver is in alpha phase. Report this at their site and hope they make this work sometime in the future.
– icza
Nov 21 '18 at 15:31
Why are you traying to have point to stirng. I think your problem may solve if you use Result string
– Ehsan.Saradar
Nov 21 '18 at 16:06
1
I'm parsing data from another teams mongodb, and I think they do it because the value wasn't set, instead of it being set but empty. I'll make a ticket on the mongo driver GitHub. Thanks
– budge
Nov 21 '18 at 16:18
You can try like this play.golang.org/p/K6Nlhg3LN5W.
– Shudipta Sharma
Nov 21 '18 at 17:47
|
show 1 more comment
Far better is avoid null. Empty string is better than pointer.
– Alex Pliutau
Nov 21 '18 at 15:07
Your code should work rightfully. It looks the unmarshaling process is not the reverse of the marshaling process. The official MongoDB driver is in alpha phase. Report this at their site and hope they make this work sometime in the future.
– icza
Nov 21 '18 at 15:31
Why are you traying to have point to stirng. I think your problem may solve if you use Result string
– Ehsan.Saradar
Nov 21 '18 at 16:06
1
I'm parsing data from another teams mongodb, and I think they do it because the value wasn't set, instead of it being set but empty. I'll make a ticket on the mongo driver GitHub. Thanks
– budge
Nov 21 '18 at 16:18
You can try like this play.golang.org/p/K6Nlhg3LN5W.
– Shudipta Sharma
Nov 21 '18 at 17:47
Far better is avoid null. Empty string is better than pointer.
– Alex Pliutau
Nov 21 '18 at 15:07
Far better is avoid null. Empty string is better than pointer.
– Alex Pliutau
Nov 21 '18 at 15:07
Your code should work rightfully. It looks the unmarshaling process is not the reverse of the marshaling process. The official MongoDB driver is in alpha phase. Report this at their site and hope they make this work sometime in the future.
– icza
Nov 21 '18 at 15:31
Your code should work rightfully. It looks the unmarshaling process is not the reverse of the marshaling process. The official MongoDB driver is in alpha phase. Report this at their site and hope they make this work sometime in the future.
– icza
Nov 21 '18 at 15:31
Why are you traying to have point to stirng. I think your problem may solve if you use Result string
– Ehsan.Saradar
Nov 21 '18 at 16:06
Why are you traying to have point to stirng. I think your problem may solve if you use Result string
– Ehsan.Saradar
Nov 21 '18 at 16:06
1
1
I'm parsing data from another teams mongodb, and I think they do it because the value wasn't set, instead of it being set but empty. I'll make a ticket on the mongo driver GitHub. Thanks
– budge
Nov 21 '18 at 16:18
I'm parsing data from another teams mongodb, and I think they do it because the value wasn't set, instead of it being set but empty. I'll make a ticket on the mongo driver GitHub. Thanks
– budge
Nov 21 '18 at 16:18
You can try like this play.golang.org/p/K6Nlhg3LN5W.
– Shudipta Sharma
Nov 21 '18 at 17:47
You can try like this play.golang.org/p/K6Nlhg3LN5W.
– Shudipta Sharma
Nov 21 '18 at 17:47
|
show 1 more comment
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Far better is avoid null. Empty string is better than pointer.
– Alex Pliutau
Nov 21 '18 at 15:07
Your code should work rightfully. It looks the unmarshaling process is not the reverse of the marshaling process. The official MongoDB driver is in alpha phase. Report this at their site and hope they make this work sometime in the future.
– icza
Nov 21 '18 at 15:31
Why are you traying to have point to stirng. I think your problem may solve if you use Result string
– Ehsan.Saradar
Nov 21 '18 at 16:06
1
I'm parsing data from another teams mongodb, and I think they do it because the value wasn't set, instead of it being set but empty. I'll make a ticket on the mongo driver GitHub. Thanks
– budge
Nov 21 '18 at 16:18
You can try like this play.golang.org/p/K6Nlhg3LN5W.
– Shudipta Sharma
Nov 21 '18 at 17:47