Graphql : Cannot return null for non-nullable field #902
Description
Hello,
I've got a very strange problem using graphql.
When I list some Contacts (note: this is the entity used by doctrine_user_provider to check login) :
{
contacts(first: 30, after: "MjAw") {
edges {
node {
_id
salesforceId
email
role
passwordSent
firstName
lastName
phone
mobilePhone
function {
id
label
}
contactOwner {
id
salesforceId
}
account {
salesforceId
}
contactTitle {
salesforceId
}
department {
salesforceId
}
lastUpstreamSync
}
}
}
}
I've got for one contact (id 219) this error :
{
"errors": [
{
"debugMessage": "Cannot return null for non-nullable field Contact.role.",
"message": "Internal server error",
"category": "internal",
"locations": [
{
"line": 8,
"column": 9
}
],
"path": [
"contacts",
"edges",
16,
"node",
"role"
]
}
],
"data": {
"contacts": {
"edges": [
// some contacts...
{
"node": null
},
// some contacts...
]
}
}
}
All other Contacts are returning fine, just this one (and only this one) fails to return properly. I've double checked what value in db could lead to such a problem, the record seems fine, no strange data, some expected null fields, no null in not null fields...
If I query this item with the same fields, it's all ok:
{
contact(id: "/v2/contacts/219") {
_id
salesforceId
email
role
passwordSent
firstName
lastName
phone
mobilePhone
function {
id
label
}
contactOwner {
id
salesforceId
}
account {
salesforceId
}
contactTitle {
salesforceId
}
department {
salesforceId
}
lastUpstreamSync
}
}
returns:
{
"data": {
"contact": {
"_id": 219,
"salesforceId": "obfurscated",
"email": "obfurscated@obfurscated.fr",
"role": "ROLE_ADMINISTRATOR",
"passwordSent": false,
"firstName": "obfurscated",
"lastName": "obfurscated",
"phone": "",
"mobilePhone": "obfurscated",
"function": {
"id": "\/v2\/contact_functions\/18",
"label": "Direction"
},
"contactOwner": null,
"account": null,
"contactTitle": {
"salesforceId": "obfurscated"
},
"department": {
"salesforceId": "obfurscated"
},
"lastUpstreamSync": null
}
}
}
If i change the field role to accept nullable :
/**
* @var string role
*
* @ORM\Column(type="string", length=60, unique=false, nullable=true)
*/
private $role = "NO_ACCESS";
Then the list query raises no error but returns this :
{
"data": {
"contacts": {
"edges": [
// some contacts...
{
"node": {
"_id": 219,
"salesforceId": "obfurscated",
"email": null,
"role": null,
"passwordSent": null,
"firstName": null,
"lastName": null,
"phone": null,
"mobilePhone": null,
"function": null,
"contactOwner": null,
"account": null,
"contactTitle": null,
"department": null,
"lastUpstreamSync": null
}
},
// some contacts...
]
}
}
}
What could lead to such a behavior, where should I look ?