[Bug] TH doesn't find cases related to an alert's artifacts

[NicknameNotTaken]

Request Type

Bug

Work Environment

Question	Answer
OS version (server)	Debian Buster
OS version (client)	Win10
TheHive version / git hash	4.0-RC1
Package Type	DEB
Browser type & version	Firefox 73

Problem Description

I created 2 alerts via the API with the same observable. I imported one and previewed the other, but the case previously created doesn't show up.
I also tried to mark the case's observable as IOC, but no change.

However, two cases with the same observables will be flagged as related.

Steps to Reproduce

1. Create 2 alerts with the same observable
2. Import one alert as a new case
3. Preview the second one

Complementary information

The JSON returned when previewing the alert is the following:

    "_id": "45056",
    "id": "45056",
    "createdBy": "admin@localhost",
    "updatedBy": null,
    "createdAt": 1583182772662,
    "updatedAt": null,
    "_type": "alert",
    "type": "external",
    "source": "instance1",
    "sourceRef": "59722e",
    "externalLink": null,
    "case": null,
    "title": "New Alert2",
    "description": "N/A",
    "severity": 2,
    "date": 1583182770000,
    "tags": ["TheHive4Py", "sample"],
    "tlp": 3,
    "pap": 2,
    "status": "New",
    "follow": true,
    "customFields": {},
    "caseTemplate": null,
    "artifacts": [{
        "_id": "61576",
        "id": "61576",
        "createdBy": "admin@localhost",
        "createdAt": 1583182772656,
        "_type": "case_artifact",
        "dataType": "ip",
        "data": "8.8.8.8",
        "startDate": 1583182772656,
        "tlp": 2,
        "tags": [],
        "ioc": false,
        "sighted": false,
        "reports": {},
        "stats": {}
    }]
}

I'm guessing the value of the field "sighted" should be "true".

I also noticed no specific error in Cassandra's or TH's logs.

[cyberpescadito]

Hi,

Also when i'm creating an observable already declared in another case, i have to refresh the page for the relation between the two cases to be displayed. dunno if it's not a bug but a feature?