Once the content’s structure is declared on our API, logical links between Students and Knowledge Nodes are created. We could call that « subscriptions ». But it goes further than that since this link is also the container of all the results, data computations and analysis for the student. A Student is automatically related to all the Knowledge Nodes.\\

{{ :api2:knowledge_structure:kns.jpg?400 | knowledge_node_students }}

===Object resources===
^ Property     ^ Type      ^ Description         ^
| id | Integer | identifier for the database of Domoscio's API |
| knowledge_node_id | Integer | The knowledge node the knowledge node student belongs to |
| knowledge_node_uid | String | Unique identifier for your database of the knowledge node |
| student_id | Integer | The student the knowledge node student belongs to |
| student_uid | Integer | Unique identifier for your database of the student |
| active | Boolean | It becomes false when the reviewing has been done to the end |
| score | Float | The estimated level of the student |
| next_review_at | DateTime | The next reviewing date computed by the engine |
| created_at | DateTime | Date of creation of the object |
| updated_at | DateTime | Last time the object has been modified |


===Fetch (GET)===

^ Method | GET |
^ URL | /knowledge_node_students/{knowledge_node_student_id} |

If no knowledge_node_student_id is provided it will fetch all the Knowledge Node Students for your instance. You can choose to filter the output by providing the following parameters:\\
^ Property     ^ Type      ^ Description         ^
| knowledge_node_id | Integer | The knowledge node the knowledge node student belongs to |
| student_id | Integer | The student the knowledge node student belongs to |

==Get the response (JSON output example)==

**With ID provided**\\

<code>
{
    "id": 762,
    "knowledge_node_id": 2717,
    "student_id": 267,
    "created_at": null,
    "updated_at": "2017-09-20T14:35:45.256Z",
    "next_review_at": "2017-09-22T14:35:45.252Z",
    "active": true,
    "score": 0.875,
    "theta": 3,
    "knowledge_node_uid": "fin_bank",
    "student_uid": "bpraly"
}
</code>


**Without ID provided**\\
<code>
[
    {
        "id": 759,
        "knowledge_node_id": 2714,
        "student_id": 267,
        "created_at": "2017-09-15T17:37:45.226Z",
        "updated_at": "2017-11-20T09:53:09.642Z",
        "next_review_at": "2017-11-22T09:53:09.621Z",
        "active": true,
        "score": null,
        "theta": 0,
        "knowledge_node_uid": "fin_asset",
        "student_uid": "bpraly"
    },
    {
        "id": 762,
        "knowledge_node_id": 2717,
        "student_id": 267,
        "created_at": "2017-09-15T17:37:45.226Z",
        "updated_at": "2017-09-20T14:35:45.256Z",
        "next_review_at": "2017-09-22T14:35:45.252Z",
        "active": true,
        "score": 0.875,
        "theta": 3,
        "knowledge_node_uid": "fin_bank",
        "student_uid": "bpraly"
    }
]
</code>

===Fetch Knowledge Node Students by Student (GET)===

^ Method | GET |
^ URL | /students/{student_id}/knowledge_node_students/ |