Hello ! 
I’m creating a GO API that can handle http request to send query or mutations to my DgraphDatabase , so far so good , i can query and mutate from postman with no problems except that when i try to mutate to and existing node by referencing the uid from that node , it always creates a new node ( that doesn’t happen when i mutate in ratel ) and i’m having trouble finding what i did wrong.
Exemple : sending this in a POST request while uid:“0x131” exists in the DB
{
"uid":"0x131",
"firstname":"johnny"
}
Returns this, And creates a new node named johnny with uid:“0x134”
txn:<start_ts:858 commit_ts:859 preds:"1-date_created" preds:"1-date_modified" preds:"1-firstname" > latency:<parsing_ns:68799 processing_ns:4069549 assign_timestamp_ns:1485334 5:5808062 > uids:<key:"dg.398602261.110" value:"0x134" >
Here is how I setup my go Struct :
type Contact struct {
uid string `json:"uid,omitempty`"
FirstName string `json:"firstname,omitempty"`
LastName string `json:"lastname,omitempty"`
OfficePhone string `json:"officephone,omitempty"`
Raw []byte `json:"raw_bytes,omitempty"`
MobilePhone string `json:"mobilephone,omitempty"`
Title string `json:"title,omitempty"`
Department string `json:"department,omitempty"`
PersonRole string `json:"role,omitempty"`
PersonnalEmail string `json:"personnalemail,omitempty"`
City string `json:"city,omitempty"`
Country string `json:"country,omitempty"`
Address string `json:"address,omitempty"`
Description string `json:"description,omitempty"`
Dtype []string `json:"dgraph.type,omitempty"`
Discussion []Discussion `json:"disc,omitempty"`
Email []Email `json:"email,omitempty"`
Document []Document `json:"doc,omitempty"`
AssignedTo *AssignedTo `json:"assignedto,omitempty"`
BelongsTo *BelongsTo `json:"belongsto,string,omitempty"`
CreatedBy string `json:"created_by,omitempty"`
DateModified time.Time `json:"date_modified,omitempty"`
DateCreated time.Time `json:"date_created,omitempty"`
}